diff --git a/BUILD b/BUILD
index 51c76aa579f..41b23bb700f 100644
--- a/BUILD
+++ b/BUILD
@@ -639,7 +639,6 @@ cc_library(
     "src/cpp/server/secure_server_credentials.h",
     "src/cpp/client/channel.h",
     "src/cpp/common/create_auth_context.h",
-    "src/cpp/server/thread_pool.h",
     "src/cpp/client/secure_channel_arguments.cc",
     "src/cpp/client/secure_credentials.cc",
     "src/cpp/common/secure_auth_context.cc",
@@ -659,12 +658,12 @@ cc_library(
     "src/cpp/proto/proto_utils.cc",
     "src/cpp/server/async_generic_service.cc",
     "src/cpp/server/create_default_thread_pool.cc",
+    "src/cpp/server/fixed_size_thread_pool.cc",
     "src/cpp/server/insecure_server_credentials.cc",
     "src/cpp/server/server.cc",
     "src/cpp/server/server_builder.cc",
     "src/cpp/server/server_context.cc",
     "src/cpp/server/server_credentials.cc",
-    "src/cpp/server/thread_pool.cc",
     "src/cpp/util/byte_buffer.cc",
     "src/cpp/util/slice.cc",
     "src/cpp/util/status.cc",
@@ -683,6 +682,7 @@ cc_library(
     "include/grpc++/config_protobuf.h",
     "include/grpc++/create_channel.h",
     "include/grpc++/credentials.h",
+    "include/grpc++/fixed_size_thread_pool.h",
     "include/grpc++/generic_stub.h",
     "include/grpc++/impl/call.h",
     "include/grpc++/impl/client_unary_call.h",
@@ -727,7 +727,6 @@ cc_library(
   srcs = [
     "src/cpp/client/channel.h",
     "src/cpp/common/create_auth_context.h",
-    "src/cpp/server/thread_pool.h",
     "src/cpp/common/insecure_create_auth_context.cc",
     "src/cpp/client/channel.cc",
     "src/cpp/client/channel_arguments.cc",
@@ -743,12 +742,12 @@ cc_library(
     "src/cpp/proto/proto_utils.cc",
     "src/cpp/server/async_generic_service.cc",
     "src/cpp/server/create_default_thread_pool.cc",
+    "src/cpp/server/fixed_size_thread_pool.cc",
     "src/cpp/server/insecure_server_credentials.cc",
     "src/cpp/server/server.cc",
     "src/cpp/server/server_builder.cc",
     "src/cpp/server/server_context.cc",
     "src/cpp/server/server_credentials.cc",
-    "src/cpp/server/thread_pool.cc",
     "src/cpp/util/byte_buffer.cc",
     "src/cpp/util/slice.cc",
     "src/cpp/util/status.cc",
@@ -767,6 +766,7 @@ cc_library(
     "include/grpc++/config_protobuf.h",
     "include/grpc++/create_channel.h",
     "include/grpc++/credentials.h",
+    "include/grpc++/fixed_size_thread_pool.h",
     "include/grpc++/generic_stub.h",
     "include/grpc++/impl/call.h",
     "include/grpc++/impl/client_unary_call.h",
diff --git a/Makefile b/Makefile
index 9694068a17a..506c79cd477 100644
--- a/Makefile
+++ b/Makefile
@@ -339,10 +339,10 @@ CACHE_MK =
 HAS_PKG_CONFIG ?= $(shell command -v $(PKG_CONFIG) >/dev/null 2>&1 && echo true || echo false)
 
 ifeq ($(HAS_PKG_CONFIG), true)
-CACHE_MK += HAS_PKG_CONFIG = true\n
+CACHE_MK += HAS_PKG_CONFIG = true,
 endif
 
-PC_TEMPLATE = prefix=$(prefix)\nexec_prefix=\$${prefix}\nincludedir=\$${prefix}/include\nlibdir=\$${exec_prefix}/lib\n\nName: $(PC_NAME)\nDescription: $(PC_DESCRIPTION)\nVersion: $(VERSION)\nCflags: -I\$${includedir} $(PC_CFLAGS)\nRequires.private: $(PC_REQUIRES_PRIVATE)\nLibs: -L\$${libdir} $(PC_LIB)\nLibs.private: $(PC_LIBS_PRIVATE)
+PC_TEMPLATE = prefix=$(prefix),exec_prefix=\$${prefix},includedir=\$${prefix}/include,libdir=\$${exec_prefix}/lib,,Name: $(PC_NAME),Description: $(PC_DESCRIPTION),Version: $(VERSION),Cflags: -I\$${includedir} $(PC_CFLAGS),Requires.private: $(PC_REQUIRES_PRIVATE),Libs: -L\$${libdir} $(PC_LIB),Libs.private: $(PC_LIBS_PRIVATE)
 
 # gpr .pc file
 PC_NAME = gRPC Portable Runtime
@@ -417,7 +417,7 @@ HAS_SYSTEM_PERFTOOLS ?= $(shell $(PERFTOOLS_CHECK_CMD) 2> /dev/null && echo true
 ifeq ($(HAS_SYSTEM_PERFTOOLS),true)
 DEFINES += GRPC_HAVE_PERFTOOLS
 LIBS += profiler
-CACHE_MK += HAS_SYSTEM_PERFTOOLS = true\n
+CACHE_MK += HAS_SYSTEM_PERFTOOLS = true,
 endif
 endif
 
@@ -426,20 +426,20 @@ ifndef REQUIRE_CUSTOM_LIBRARIES_$(CONFIG)
 HAS_SYSTEM_OPENSSL_ALPN ?= $(shell $(OPENSSL_ALPN_CHECK_CMD) 2> /dev/null && echo true || echo false)
 ifeq ($(HAS_SYSTEM_OPENSSL_ALPN),true)
 HAS_SYSTEM_OPENSSL_NPN = true
-CACHE_MK += HAS_SYSTEM_OPENSSL_ALPN = true\n
+CACHE_MK += HAS_SYSTEM_OPENSSL_ALPN = true,
 else
 HAS_SYSTEM_OPENSSL_NPN ?= $(shell $(OPENSSL_NPN_CHECK_CMD) 2> /dev/null && echo true || echo false)
 endif
 ifeq ($(HAS_SYSTEM_OPENSSL_NPN),true)
-CACHE_MK += HAS_SYSTEM_OPENSSL_NPN = true\n
+CACHE_MK += HAS_SYSTEM_OPENSSL_NPN = true,
 endif
 HAS_SYSTEM_ZLIB ?= $(shell $(ZLIB_CHECK_CMD) 2> /dev/null && echo true || echo false)
 ifeq ($(HAS_SYSTEM_ZLIB),true)
-CACHE_MK += HAS_SYSTEM_ZLIB = true\n
+CACHE_MK += HAS_SYSTEM_ZLIB = true,
 endif
 HAS_SYSTEM_PROTOBUF ?= $(HAS_SYSTEM_PROTOBUF_VERIFY)
 ifeq ($(HAS_SYSTEM_PROTOBUF),true)
-CACHE_MK += HAS_SYSTEM_PROTOBUF = true\n
+CACHE_MK += HAS_SYSTEM_PROTOBUF = true,
 endif
 else
 # override system libraries if the config requires a custom compiled library
@@ -451,10 +451,10 @@ endif
 
 HAS_PROTOC ?= $(shell $(PROTOC_CHECK_CMD) 2> /dev/null && echo true || echo false)
 ifeq ($(HAS_PROTOC),true)
-CACHE_MK += HAS_PROTOC = true\n
+CACHE_MK += HAS_PROTOC = true,
 HAS_VALID_PROTOC ?= $(shell $(PROTOC_CHECK_VERSION_CMD) 2> /dev/null && echo true || echo false)
 ifeq ($(HAS_VALID_PROTOC),true)
-CACHE_MK += HAS_VALID_PROTOC = true\n
+CACHE_MK += HAS_VALID_PROTOC = true,
 endif
 else
 HAS_VALID_PROTOC = false
@@ -475,7 +475,7 @@ endif
 endif
 
 ifeq ($(HAS_SYSTEMTAP),true)
-CACHE_MK += HAS_SYSTEMTAP = true\n
+CACHE_MK += HAS_SYSTEMTAP = true,
 endif
 
 # Note that for testing purposes, one can do:
@@ -852,6 +852,7 @@ cxx_byte_buffer_test: $(BINDIR)/$(CONFIG)/cxx_byte_buffer_test
 cxx_slice_test: $(BINDIR)/$(CONFIG)/cxx_slice_test
 cxx_time_test: $(BINDIR)/$(CONFIG)/cxx_time_test
 end2end_test: $(BINDIR)/$(CONFIG)/end2end_test
+fixed_size_thread_pool_test: $(BINDIR)/$(CONFIG)/fixed_size_thread_pool_test
 generic_end2end_test: $(BINDIR)/$(CONFIG)/generic_end2end_test
 grpc_cli: $(BINDIR)/$(CONFIG)/grpc_cli
 grpc_cpp_plugin: $(BINDIR)/$(CONFIG)/grpc_cpp_plugin
@@ -877,7 +878,6 @@ server_crash_test_client: $(BINDIR)/$(CONFIG)/server_crash_test_client
 status_test: $(BINDIR)/$(CONFIG)/status_test
 sync_streaming_ping_pong_test: $(BINDIR)/$(CONFIG)/sync_streaming_ping_pong_test
 sync_unary_ping_pong_test: $(BINDIR)/$(CONFIG)/sync_unary_ping_pong_test
-thread_pool_test: $(BINDIR)/$(CONFIG)/thread_pool_test
 thread_stress_test: $(BINDIR)/$(CONFIG)/thread_stress_test
 chttp2_fake_security_bad_hostname_test: $(BINDIR)/$(CONFIG)/chttp2_fake_security_bad_hostname_test
 chttp2_fake_security_cancel_after_accept_test: $(BINDIR)/$(CONFIG)/chttp2_fake_security_cancel_after_accept_test
@@ -1514,7 +1514,7 @@ buildtests: buildtests_c buildtests_cxx
 
 buildtests_c: privatelibs_c $(BINDIR)/$(CONFIG)/alarm_heap_test $(BINDIR)/$(CONFIG)/alarm_list_test $(BINDIR)/$(CONFIG)/alarm_test $(BINDIR)/$(CONFIG)/alpn_test $(BINDIR)/$(CONFIG)/bin_encoder_test $(BINDIR)/$(CONFIG)/chttp2_status_conversion_test $(BINDIR)/$(CONFIG)/chttp2_stream_encoder_test $(BINDIR)/$(CONFIG)/chttp2_stream_map_test $(BINDIR)/$(CONFIG)/dualstack_socket_test $(BINDIR)/$(CONFIG)/fd_conservation_posix_test $(BINDIR)/$(CONFIG)/fd_posix_test $(BINDIR)/$(CONFIG)/fling_client $(BINDIR)/$(CONFIG)/fling_server $(BINDIR)/$(CONFIG)/fling_stream_test $(BINDIR)/$(CONFIG)/fling_test $(BINDIR)/$(CONFIG)/gpr_cancellable_test $(BINDIR)/$(CONFIG)/gpr_cmdline_test $(BINDIR)/$(CONFIG)/gpr_env_test $(BINDIR)/$(CONFIG)/gpr_file_test $(BINDIR)/$(CONFIG)/gpr_histogram_test $(BINDIR)/$(CONFIG)/gpr_host_port_test $(BINDIR)/$(CONFIG)/gpr_log_test $(BINDIR)/$(CONFIG)/gpr_slice_buffer_test $(BINDIR)/$(CONFIG)/gpr_slice_test $(BINDIR)/$(CONFIG)/gpr_stack_lockfree_test $(BINDIR)/$(CONFIG)/gpr_string_test $(BINDIR)/$(CONFIG)/gpr_sync_test $(BINDIR)/$(CONFIG)/gpr_thd_test $(BINDIR)/$(CONFIG)/gpr_time_test $(BINDIR)/$(CONFIG)/gpr_tls_test $(BINDIR)/$(CONFIG)/gpr_useful_test $(BINDIR)/$(CONFIG)/grpc_auth_context_test $(BINDIR)/$(CONFIG)/grpc_base64_test $(BINDIR)/$(CONFIG)/grpc_byte_buffer_reader_test $(BINDIR)/$(CONFIG)/grpc_channel_stack_test $(BINDIR)/$(CONFIG)/grpc_completion_queue_test $(BINDIR)/$(CONFIG)/grpc_credentials_test $(BINDIR)/$(CONFIG)/grpc_json_token_test $(BINDIR)/$(CONFIG)/grpc_jwt_verifier_test $(BINDIR)/$(CONFIG)/grpc_security_connector_test $(BINDIR)/$(CONFIG)/grpc_stream_op_test $(BINDIR)/$(CONFIG)/hpack_parser_test $(BINDIR)/$(CONFIG)/hpack_table_test $(BINDIR)/$(CONFIG)/httpcli_format_request_test $(BINDIR)/$(CONFIG)/httpcli_parser_test $(BINDIR)/$(CONFIG)/httpcli_test $(BINDIR)/$(CONFIG)/json_rewrite $(BINDIR)/$(CONFIG)/json_rewrite_test $(BINDIR)/$(CONFIG)/json_test $(BINDIR)/$(CONFIG)/lame_client_test $(BINDIR)/$(CONFIG)/message_compress_test $(BINDIR)/$(CONFIG)/multi_init_test $(BINDIR)/$(CONFIG)/multiple_server_queues_test $(BINDIR)/$(CONFIG)/murmur_hash_test $(BINDIR)/$(CONFIG)/no_server_test $(BINDIR)/$(CONFIG)/poll_kick_posix_test $(BINDIR)/$(CONFIG)/resolve_address_test $(BINDIR)/$(CONFIG)/secure_endpoint_test $(BINDIR)/$(CONFIG)/sockaddr_utils_test $(BINDIR)/$(CONFIG)/tcp_client_posix_test $(BINDIR)/$(CONFIG)/tcp_posix_test $(BINDIR)/$(CONFIG)/tcp_server_posix_test $(BINDIR)/$(CONFIG)/time_averaged_stats_test $(BINDIR)/$(CONFIG)/time_test $(BINDIR)/$(CONFIG)/timeout_encoding_test $(BINDIR)/$(CONFIG)/timers_test $(BINDIR)/$(CONFIG)/transport_metadata_test $(BINDIR)/$(CONFIG)/transport_security_test $(BINDIR)/$(CONFIG)/uri_parser_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_bad_hostname_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_cancel_after_accept_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_cancel_after_accept_and_writes_closed_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_cancel_after_invoke_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_cancel_before_invoke_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_cancel_in_a_vacuum_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_census_simple_request_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_channel_connectivity_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_disappearing_server_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_early_server_shutdown_finishes_inflight_calls_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_early_server_shutdown_finishes_tags_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_empty_batch_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_graceful_server_shutdown_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_invoke_large_request_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_max_concurrent_streams_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_max_message_length_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_no_op_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_ping_pong_streaming_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_registered_call_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_request_response_with_binary_metadata_and_payload_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_request_response_with_metadata_and_payload_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_request_response_with_payload_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_request_response_with_payload_and_call_creds_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_request_response_with_trailing_metadata_and_payload_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_request_with_flags_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_request_with_large_metadata_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_request_with_payload_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_server_finishes_request_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_simple_delayed_request_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_simple_request_test $(BINDIR)/$(CONFIG)/chttp2_fake_security_simple_request_with_high_initial_sequence_number_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_bad_hostname_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_cancel_after_accept_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_cancel_after_accept_and_writes_closed_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_cancel_after_invoke_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_cancel_before_invoke_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_cancel_in_a_vacuum_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_census_simple_request_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_channel_connectivity_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_disappearing_server_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_early_server_shutdown_finishes_inflight_calls_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_early_server_shutdown_finishes_tags_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_empty_batch_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_graceful_server_shutdown_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_invoke_large_request_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_max_concurrent_streams_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_max_message_length_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_no_op_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_ping_pong_streaming_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_registered_call_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_request_response_with_binary_metadata_and_payload_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_request_response_with_metadata_and_payload_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_request_response_with_payload_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_request_response_with_payload_and_call_creds_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_request_response_with_trailing_metadata_and_payload_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_request_with_flags_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_request_with_large_metadata_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_request_with_payload_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_server_finishes_request_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_simple_delayed_request_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_simple_request_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_simple_request_with_high_initial_sequence_number_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_bad_hostname_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_cancel_after_accept_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_cancel_after_accept_and_writes_closed_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_cancel_after_invoke_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_cancel_before_invoke_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_cancel_in_a_vacuum_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_census_simple_request_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_channel_connectivity_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_disappearing_server_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_early_server_shutdown_finishes_inflight_calls_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_early_server_shutdown_finishes_tags_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_empty_batch_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_graceful_server_shutdown_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_invoke_large_request_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_max_concurrent_streams_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_max_message_length_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_no_op_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_ping_pong_streaming_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_registered_call_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_request_response_with_binary_metadata_and_payload_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_request_response_with_metadata_and_payload_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_request_response_with_payload_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_request_response_with_payload_and_call_creds_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_request_response_with_trailing_metadata_and_payload_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_request_with_flags_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_request_with_large_metadata_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_request_with_payload_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_server_finishes_request_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_simple_delayed_request_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_simple_request_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_simple_request_with_high_initial_sequence_number_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_with_poll_bad_hostname_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_with_poll_cancel_after_accept_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_with_poll_cancel_after_accept_and_writes_closed_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_with_poll_cancel_after_invoke_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_with_poll_cancel_before_invoke_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_with_poll_cancel_in_a_vacuum_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_with_poll_census_simple_request_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_with_poll_channel_connectivity_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_with_poll_disappearing_server_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_with_poll_early_server_shutdown_finishes_inflight_calls_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_with_poll_early_server_shutdown_finishes_tags_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_with_poll_empty_batch_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_with_poll_graceful_server_shutdown_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_with_poll_invoke_large_request_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_with_poll_max_concurrent_streams_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_with_poll_max_message_length_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_with_poll_no_op_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_with_poll_ping_pong_streaming_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_with_poll_registered_call_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_with_poll_request_response_with_binary_metadata_and_payload_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_with_poll_request_response_with_metadata_and_payload_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_with_poll_request_response_with_payload_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_with_poll_request_response_with_payload_and_call_creds_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_with_poll_request_response_with_trailing_metadata_and_payload_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_with_poll_request_with_flags_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_with_poll_request_with_large_metadata_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_with_poll_request_with_payload_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_with_poll_server_finishes_request_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_with_poll_simple_delayed_request_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_with_poll_simple_request_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_with_poll_simple_request_with_high_initial_sequence_number_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_bad_hostname_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_cancel_after_accept_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_cancel_after_accept_and_writes_closed_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_cancel_after_invoke_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_cancel_before_invoke_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_cancel_in_a_vacuum_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_census_simple_request_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_channel_connectivity_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_disappearing_server_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_early_server_shutdown_finishes_inflight_calls_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_early_server_shutdown_finishes_tags_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_empty_batch_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_graceful_server_shutdown_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_invoke_large_request_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_max_concurrent_streams_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_max_message_length_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_no_op_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_ping_pong_streaming_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_registered_call_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_request_response_with_binary_metadata_and_payload_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_request_response_with_metadata_and_payload_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_request_response_with_payload_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_request_response_with_payload_and_call_creds_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_request_response_with_trailing_metadata_and_payload_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_request_with_flags_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_request_with_large_metadata_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_request_with_payload_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_server_finishes_request_test 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$(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_disappearing_server_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_early_server_shutdown_finishes_inflight_calls_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_early_server_shutdown_finishes_tags_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_empty_batch_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_graceful_server_shutdown_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_invoke_large_request_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_max_concurrent_streams_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_max_message_length_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_no_op_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_ping_pong_streaming_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_registered_call_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_request_response_with_binary_metadata_and_payload_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_request_response_with_metadata_and_payload_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_request_response_with_payload_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_request_response_with_trailing_metadata_and_payload_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_request_with_flags_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_request_with_large_metadata_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_request_with_payload_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_server_finishes_request_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_simple_delayed_request_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_simple_request_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_simple_request_with_high_initial_sequence_number_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_with_poll_bad_hostname_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_with_poll_cancel_after_accept_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_with_poll_cancel_after_accept_and_writes_closed_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_with_poll_cancel_after_invoke_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_with_poll_cancel_before_invoke_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_with_poll_cancel_in_a_vacuum_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_with_poll_census_simple_request_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_with_poll_channel_connectivity_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_with_poll_disappearing_server_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_with_poll_early_server_shutdown_finishes_inflight_calls_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_with_poll_early_server_shutdown_finishes_tags_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_with_poll_empty_batch_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_with_poll_graceful_server_shutdown_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_with_poll_invoke_large_request_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_with_poll_max_concurrent_streams_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_with_poll_max_message_length_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_with_poll_no_op_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_with_poll_ping_pong_streaming_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_with_poll_registered_call_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_with_poll_request_response_with_binary_metadata_and_payload_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_with_poll_request_response_with_metadata_and_payload_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_with_poll_request_response_with_payload_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_with_poll_request_response_with_trailing_metadata_and_payload_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_with_poll_request_with_flags_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_with_poll_request_with_large_metadata_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_with_poll_request_with_payload_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_with_poll_server_finishes_request_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_with_poll_simple_delayed_request_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_with_poll_simple_request_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_with_poll_simple_request_with_high_initial_sequence_number_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_bad_hostname_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_cancel_after_accept_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_cancel_after_accept_and_writes_closed_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_cancel_after_invoke_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_cancel_before_invoke_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_cancel_in_a_vacuum_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_census_simple_request_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_channel_connectivity_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_disappearing_server_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_early_server_shutdown_finishes_inflight_calls_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_early_server_shutdown_finishes_tags_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_empty_batch_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_graceful_server_shutdown_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_invoke_large_request_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_max_concurrent_streams_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_max_message_length_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_no_op_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_ping_pong_streaming_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_registered_call_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_request_response_with_binary_metadata_and_payload_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_request_response_with_metadata_and_payload_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_request_response_with_payload_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_request_response_with_trailing_metadata_and_payload_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_request_with_flags_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_request_with_large_metadata_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_request_with_payload_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_server_finishes_request_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_simple_delayed_request_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_simple_request_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_fullstack_with_poll_simple_request_with_high_initial_sequence_number_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_bad_hostname_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_cancel_after_accept_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_cancel_after_accept_and_writes_closed_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_cancel_after_invoke_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_cancel_before_invoke_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_cancel_in_a_vacuum_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_census_simple_request_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_early_server_shutdown_finishes_inflight_calls_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_early_server_shutdown_finishes_tags_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_empty_batch_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_graceful_server_shutdown_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_invoke_large_request_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_max_concurrent_streams_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_max_message_length_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_no_op_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_ping_pong_streaming_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_registered_call_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_request_response_with_binary_metadata_and_payload_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_request_response_with_metadata_and_payload_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_request_response_with_payload_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_request_response_with_trailing_metadata_and_payload_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_request_with_flags_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_request_with_large_metadata_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_request_with_payload_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_server_finishes_request_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_simple_request_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_simple_request_with_high_initial_sequence_number_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_bad_hostname_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_cancel_after_accept_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_cancel_after_accept_and_writes_closed_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_cancel_after_invoke_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_cancel_before_invoke_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_cancel_in_a_vacuum_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_census_simple_request_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_early_server_shutdown_finishes_inflight_calls_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_early_server_shutdown_finishes_tags_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_empty_batch_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_graceful_server_shutdown_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_invoke_large_request_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_max_concurrent_streams_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_max_message_length_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_no_op_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_ping_pong_streaming_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_registered_call_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_request_response_with_binary_metadata_and_payload_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_request_response_with_metadata_and_payload_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_request_response_with_payload_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_request_response_with_trailing_metadata_and_payload_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_request_with_flags_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_request_with_large_metadata_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_request_with_payload_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_server_finishes_request_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_simple_request_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_simple_request_with_high_initial_sequence_number_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_with_grpc_trace_bad_hostname_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_with_grpc_trace_cancel_after_accept_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_with_grpc_trace_cancel_after_accept_and_writes_closed_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_with_grpc_trace_cancel_after_invoke_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_with_grpc_trace_cancel_before_invoke_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_with_grpc_trace_cancel_in_a_vacuum_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_with_grpc_trace_census_simple_request_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_with_grpc_trace_early_server_shutdown_finishes_inflight_calls_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_with_grpc_trace_early_server_shutdown_finishes_tags_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_with_grpc_trace_empty_batch_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_with_grpc_trace_graceful_server_shutdown_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_with_grpc_trace_invoke_large_request_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_with_grpc_trace_max_concurrent_streams_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_with_grpc_trace_max_message_length_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_with_grpc_trace_no_op_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_with_grpc_trace_ping_pong_streaming_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_with_grpc_trace_registered_call_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_with_grpc_trace_request_response_with_binary_metadata_and_payload_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_with_grpc_trace_request_response_with_metadata_and_payload_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_with_grpc_trace_request_response_with_payload_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_with_grpc_trace_request_response_with_trailing_metadata_and_payload_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_with_grpc_trace_request_with_flags_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_with_grpc_trace_request_with_large_metadata_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_with_grpc_trace_request_with_payload_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_with_grpc_trace_server_finishes_request_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_with_grpc_trace_simple_request_unsecure_test $(BINDIR)/$(CONFIG)/chttp2_socket_pair_with_grpc_trace_simple_request_with_high_initial_sequence_number_unsecure_test $(BINDIR)/$(CONFIG)/connection_prefix_bad_client_test $(BINDIR)/$(CONFIG)/initial_settings_frame_bad_client_test
 
-buildtests_cxx: privatelibs_cxx $(BINDIR)/$(CONFIG)/async_end2end_test $(BINDIR)/$(CONFIG)/async_streaming_ping_pong_test $(BINDIR)/$(CONFIG)/async_unary_ping_pong_test $(BINDIR)/$(CONFIG)/channel_arguments_test $(BINDIR)/$(CONFIG)/cli_call_test $(BINDIR)/$(CONFIG)/client_crash_test $(BINDIR)/$(CONFIG)/client_crash_test_server $(BINDIR)/$(CONFIG)/credentials_test $(BINDIR)/$(CONFIG)/cxx_byte_buffer_test $(BINDIR)/$(CONFIG)/cxx_slice_test $(BINDIR)/$(CONFIG)/cxx_time_test $(BINDIR)/$(CONFIG)/end2end_test $(BINDIR)/$(CONFIG)/generic_end2end_test $(BINDIR)/$(CONFIG)/grpc_cli $(BINDIR)/$(CONFIG)/interop_client $(BINDIR)/$(CONFIG)/interop_server $(BINDIR)/$(CONFIG)/interop_test $(BINDIR)/$(CONFIG)/mock_test $(BINDIR)/$(CONFIG)/qps_interarrival_test $(BINDIR)/$(CONFIG)/qps_openloop_test $(BINDIR)/$(CONFIG)/qps_test $(BINDIR)/$(CONFIG)/secure_auth_context_test $(BINDIR)/$(CONFIG)/server_crash_test $(BINDIR)/$(CONFIG)/server_crash_test_client $(BINDIR)/$(CONFIG)/status_test $(BINDIR)/$(CONFIG)/sync_streaming_ping_pong_test $(BINDIR)/$(CONFIG)/sync_unary_ping_pong_test $(BINDIR)/$(CONFIG)/thread_pool_test $(BINDIR)/$(CONFIG)/thread_stress_test
+buildtests_cxx: privatelibs_cxx $(BINDIR)/$(CONFIG)/async_end2end_test $(BINDIR)/$(CONFIG)/async_streaming_ping_pong_test $(BINDIR)/$(CONFIG)/async_unary_ping_pong_test $(BINDIR)/$(CONFIG)/channel_arguments_test $(BINDIR)/$(CONFIG)/cli_call_test $(BINDIR)/$(CONFIG)/client_crash_test $(BINDIR)/$(CONFIG)/client_crash_test_server $(BINDIR)/$(CONFIG)/credentials_test $(BINDIR)/$(CONFIG)/cxx_byte_buffer_test $(BINDIR)/$(CONFIG)/cxx_slice_test $(BINDIR)/$(CONFIG)/cxx_time_test $(BINDIR)/$(CONFIG)/end2end_test $(BINDIR)/$(CONFIG)/fixed_size_thread_pool_test $(BINDIR)/$(CONFIG)/generic_end2end_test $(BINDIR)/$(CONFIG)/grpc_cli $(BINDIR)/$(CONFIG)/interop_client $(BINDIR)/$(CONFIG)/interop_server $(BINDIR)/$(CONFIG)/interop_test $(BINDIR)/$(CONFIG)/mock_test $(BINDIR)/$(CONFIG)/qps_interarrival_test $(BINDIR)/$(CONFIG)/qps_openloop_test $(BINDIR)/$(CONFIG)/qps_test $(BINDIR)/$(CONFIG)/secure_auth_context_test $(BINDIR)/$(CONFIG)/server_crash_test $(BINDIR)/$(CONFIG)/server_crash_test_client $(BINDIR)/$(CONFIG)/status_test $(BINDIR)/$(CONFIG)/sync_streaming_ping_pong_test $(BINDIR)/$(CONFIG)/sync_unary_ping_pong_test $(BINDIR)/$(CONFIG)/thread_stress_test
 
 test: test_c test_cxx
 
@@ -2751,6 +2751,8 @@ test_cxx: buildtests_cxx
 	$(Q) $(BINDIR)/$(CONFIG)/cxx_time_test || ( echo test cxx_time_test failed ; exit 1 )
 	$(E) "[RUN]     Testing end2end_test"
 	$(Q) $(BINDIR)/$(CONFIG)/end2end_test || ( echo test end2end_test failed ; exit 1 )
+	$(E) "[RUN]     Testing fixed_size_thread_pool_test"
+	$(Q) $(BINDIR)/$(CONFIG)/fixed_size_thread_pool_test || ( echo test fixed_size_thread_pool_test failed ; exit 1 )
 	$(E) "[RUN]     Testing generic_end2end_test"
 	$(Q) $(BINDIR)/$(CONFIG)/generic_end2end_test || ( echo test generic_end2end_test failed ; exit 1 )
 	$(E) "[RUN]     Testing interop_test"
@@ -2771,8 +2773,6 @@ test_cxx: buildtests_cxx
 	$(Q) $(BINDIR)/$(CONFIG)/sync_streaming_ping_pong_test || ( echo test sync_streaming_ping_pong_test failed ; exit 1 )
 	$(E) "[RUN]     Testing sync_unary_ping_pong_test"
 	$(Q) $(BINDIR)/$(CONFIG)/sync_unary_ping_pong_test || ( echo test sync_unary_ping_pong_test failed ; exit 1 )
-	$(E) "[RUN]     Testing thread_pool_test"
-	$(Q) $(BINDIR)/$(CONFIG)/thread_pool_test || ( echo test thread_pool_test failed ; exit 1 )
 	$(E) "[RUN]     Testing thread_stress_test"
 	$(Q) $(BINDIR)/$(CONFIG)/thread_stress_test || ( echo test thread_stress_test failed ; exit 1 )
 
@@ -2851,32 +2851,32 @@ endif
 
 cache.mk::
 	$(E) "[MAKE]    Generating $@"
-	$(Q) echo -e "$(CACHE_MK)" >$@
+	$(Q) echo "$(CACHE_MK)" | tr , '\n' >$@
 
 $(LIBDIR)/$(CONFIG)/pkgconfig/gpr.pc:
 	$(E) "[MAKE]    Generating $@"
 	$(Q) mkdir -p $(@D)
-	$(Q) echo -e "$(GPR_PC_FILE)" >$@
+	$(Q) echo "$(GPR_PC_FILE)" | tr , '\n' >$@
 
 $(LIBDIR)/$(CONFIG)/pkgconfig/grpc.pc:
 	$(E) "[MAKE]    Generating $@"
 	$(Q) mkdir -p $(@D)
-	$(Q) echo -e "$(GRPC_PC_FILE)" >$@
+	$(Q) echo "$(GRPC_PC_FILE)" | tr , '\n' >$@
 
 $(LIBDIR)/$(CONFIG)/pkgconfig/grpc_unsecure.pc:
 	$(E) "[MAKE]    Generating $@"
 	$(Q) mkdir -p $(@D)
-	$(Q) echo -e "$(GRPC_UNSECURE_PC_FILE)" >$@
+	$(Q) echo "$(GRPC_UNSECURE_PC_FILE)" | tr , '\n' >$@
 
 $(LIBDIR)/$(CONFIG)/pkgconfig/grpc++.pc:
 	$(E) "[MAKE]    Generating $@"
 	$(Q) mkdir -p $(@D)
-	$(Q) echo -e "$(GRPCXX_PC_FILE)" >$@
+	$(Q) echo "$(GRPCXX_PC_FILE)" | tr , '\n' >$@
 
 $(LIBDIR)/$(CONFIG)/pkgconfig/grpc++_unsecure.pc:
 	$(E) "[MAKE]    Generating $@"
 	$(Q) mkdir -p $(@D)
-	$(Q) echo -e "$(GRPCXX_UNSECURE_PC_FILE)" >$@
+	$(Q) echo "$(GRPCXX_UNSECURE_PC_FILE)" | tr , '\n' >$@
 
 ifeq ($(NO_PROTOC),true)
 $(GENDIR)/examples/pubsub/empty.pb.cc: protoc_dep_error
@@ -3884,12 +3884,12 @@ LIBGRPC++_SRC = \
     src/cpp/proto/proto_utils.cc \
     src/cpp/server/async_generic_service.cc \
     src/cpp/server/create_default_thread_pool.cc \
+    src/cpp/server/fixed_size_thread_pool.cc \
     src/cpp/server/insecure_server_credentials.cc \
     src/cpp/server/server.cc \
     src/cpp/server/server_builder.cc \
     src/cpp/server/server_context.cc \
     src/cpp/server/server_credentials.cc \
-    src/cpp/server/thread_pool.cc \
     src/cpp/util/byte_buffer.cc \
     src/cpp/util/slice.cc \
     src/cpp/util/status.cc \
@@ -3908,6 +3908,7 @@ PUBLIC_HEADERS_CXX += \
     include/grpc++/config_protobuf.h \
     include/grpc++/create_channel.h \
     include/grpc++/credentials.h \
+    include/grpc++/fixed_size_thread_pool.h \
     include/grpc++/generic_stub.h \
     include/grpc++/impl/call.h \
     include/grpc++/impl/client_unary_call.h \
@@ -4125,12 +4126,12 @@ LIBGRPC++_UNSECURE_SRC = \
     src/cpp/proto/proto_utils.cc \
     src/cpp/server/async_generic_service.cc \
     src/cpp/server/create_default_thread_pool.cc \
+    src/cpp/server/fixed_size_thread_pool.cc \
     src/cpp/server/insecure_server_credentials.cc \
     src/cpp/server/server.cc \
     src/cpp/server/server_builder.cc \
     src/cpp/server/server_context.cc \
     src/cpp/server/server_credentials.cc \
-    src/cpp/server/thread_pool.cc \
     src/cpp/util/byte_buffer.cc \
     src/cpp/util/slice.cc \
     src/cpp/util/status.cc \
@@ -4149,6 +4150,7 @@ PUBLIC_HEADERS_CXX += \
     include/grpc++/config_protobuf.h \
     include/grpc++/create_channel.h \
     include/grpc++/credentials.h \
+    include/grpc++/fixed_size_thread_pool.h \
     include/grpc++/generic_stub.h \
     include/grpc++/impl/call.h \
     include/grpc++/impl/client_unary_call.h \
@@ -8415,6 +8417,46 @@ endif
 endif
 
 
+FIXED_SIZE_THREAD_POOL_TEST_SRC = \
+    test/cpp/server/fixed_size_thread_pool_test.cc \
+
+FIXED_SIZE_THREAD_POOL_TEST_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(FIXED_SIZE_THREAD_POOL_TEST_SRC))))
+ifeq ($(NO_SECURE),true)
+
+# You can't build secure targets if you don't have OpenSSL.
+
+$(BINDIR)/$(CONFIG)/fixed_size_thread_pool_test: openssl_dep_error
+
+else
+
+
+ifeq ($(NO_PROTOBUF),true)
+
+# You can't build the protoc plugins or protobuf-enabled targets if you don't have protobuf 3.0.0+.
+
+$(BINDIR)/$(CONFIG)/fixed_size_thread_pool_test: protobuf_dep_error
+
+else
+
+$(BINDIR)/$(CONFIG)/fixed_size_thread_pool_test: $(PROTOBUF_DEP) $(FIXED_SIZE_THREAD_POOL_TEST_OBJS) $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc++.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
+	$(E) "[LD]      Linking $@"
+	$(Q) mkdir -p `dirname $@`
+	$(Q) $(LDXX) $(LDFLAGS) $(FIXED_SIZE_THREAD_POOL_TEST_OBJS) $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc++.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a $(LDLIBSXX) $(LDLIBS_PROTOBUF) $(LDLIBS) $(LDLIBS_SECURE) $(GTEST_LIB) -o $(BINDIR)/$(CONFIG)/fixed_size_thread_pool_test
+
+endif
+
+endif
+
+$(OBJDIR)/$(CONFIG)/test/cpp/server/fixed_size_thread_pool_test.o:  $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc++.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
+deps_fixed_size_thread_pool_test: $(FIXED_SIZE_THREAD_POOL_TEST_OBJS:.o=.dep)
+
+ifneq ($(NO_SECURE),true)
+ifneq ($(NO_DEPS),true)
+-include $(FIXED_SIZE_THREAD_POOL_TEST_OBJS:.o=.dep)
+endif
+endif
+
+
 GENERIC_END2END_TEST_SRC = \
     test/cpp/end2end/generic_end2end_test.cc \
 
@@ -9333,46 +9375,6 @@ endif
 endif
 
 
-THREAD_POOL_TEST_SRC = \
-    test/cpp/server/thread_pool_test.cc \
-
-THREAD_POOL_TEST_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(THREAD_POOL_TEST_SRC))))
-ifeq ($(NO_SECURE),true)
-
-# You can't build secure targets if you don't have OpenSSL.
-
-$(BINDIR)/$(CONFIG)/thread_pool_test: openssl_dep_error
-
-else
-
-
-ifeq ($(NO_PROTOBUF),true)
-
-# You can't build the protoc plugins or protobuf-enabled targets if you don't have protobuf 3.0.0+.
-
-$(BINDIR)/$(CONFIG)/thread_pool_test: protobuf_dep_error
-
-else
-
-$(BINDIR)/$(CONFIG)/thread_pool_test: $(PROTOBUF_DEP) $(THREAD_POOL_TEST_OBJS) $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc++.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
-	$(E) "[LD]      Linking $@"
-	$(Q) mkdir -p `dirname $@`
-	$(Q) $(LDXX) $(LDFLAGS) $(THREAD_POOL_TEST_OBJS) $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc++.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a $(LDLIBSXX) $(LDLIBS_PROTOBUF) $(LDLIBS) $(LDLIBS_SECURE) $(GTEST_LIB) -o $(BINDIR)/$(CONFIG)/thread_pool_test
-
-endif
-
-endif
-
-$(OBJDIR)/$(CONFIG)/test/cpp/server/thread_pool_test.o:  $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc++.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
-deps_thread_pool_test: $(THREAD_POOL_TEST_OBJS:.o=.dep)
-
-ifneq ($(NO_SECURE),true)
-ifneq ($(NO_DEPS),true)
--include $(THREAD_POOL_TEST_OBJS:.o=.dep)
-endif
-endif
-
-
 THREAD_STRESS_TEST_SRC = \
     test/cpp/end2end/thread_stress_test.cc \
 
diff --git a/README.md b/README.md
index f71ee6a6c17..36d9fa07caf 100644
--- a/README.md
+++ b/README.md
@@ -39,9 +39,9 @@ Libraries in different languages are in different state of development. We are s
    * Ruby Library: [src/ruby] (src/ruby) : Early adopter ready - Alpha.
    * NodeJS Library: [src/node] (src/node) : Early adopter ready - Alpha.
    * Python Library: [src/python] (src/python) : Early adopter ready - Alpha.
-   * C# Library: [src/csharp] (src/csharp) : Early adopter ready - Alpha.   
+   * C# Library: [src/csharp] (src/csharp) : Early adopter ready - Alpha.
+   * Objective-C Library: [src/objective-c] (src/objective-c): Early adopter ready - Alpha.
    * PHP Library: [src/php] (src/php) : Pre-Alpha.
-   * Objective-C Library: [src/objective-c] (src/objective-c): Pre-Alpha.
 
 #Overview
 
diff --git a/build.json b/build.json
index 224aef4ac01..f7c933e4e53 100644
--- a/build.json
+++ b/build.json
@@ -40,6 +40,7 @@
         "include/grpc++/config_protobuf.h",
         "include/grpc++/create_channel.h",
         "include/grpc++/credentials.h",
+        "include/grpc++/fixed_size_thread_pool.h",
         "include/grpc++/generic_stub.h",
         "include/grpc++/impl/call.h",
         "include/grpc++/impl/client_unary_call.h",
@@ -69,8 +70,7 @@
       ],
       "headers": [
         "src/cpp/client/channel.h",
-        "src/cpp/common/create_auth_context.h",
-        "src/cpp/server/thread_pool.h"
+        "src/cpp/common/create_auth_context.h"
       ],
       "src": [
         "src/cpp/client/channel.cc",
@@ -87,12 +87,12 @@
         "src/cpp/proto/proto_utils.cc",
         "src/cpp/server/async_generic_service.cc",
         "src/cpp/server/create_default_thread_pool.cc",
+        "src/cpp/server/fixed_size_thread_pool.cc",
         "src/cpp/server/insecure_server_credentials.cc",
         "src/cpp/server/server.cc",
         "src/cpp/server/server_builder.cc",
         "src/cpp/server/server_context.cc",
         "src/cpp/server/server_credentials.cc",
-        "src/cpp/server/thread_pool.cc",
         "src/cpp/util/byte_buffer.cc",
         "src/cpp/util/slice.cc",
         "src/cpp/util/status.cc",
@@ -2056,6 +2056,21 @@
         "gpr"
       ]
     },
+    {
+      "name": "fixed_size_thread_pool_test",
+      "build": "test",
+      "language": "c++",
+      "src": [
+        "test/cpp/server/fixed_size_thread_pool_test.cc"
+      ],
+      "deps": [
+        "grpc_test_util",
+        "grpc++",
+        "grpc",
+        "gpr_test_util",
+        "gpr"
+      ]
+    },
     {
       "name": "generic_end2end_test",
       "build": "test",
@@ -2462,21 +2477,6 @@
         "gpr"
       ]
     },
-    {
-      "name": "thread_pool_test",
-      "build": "test",
-      "language": "c++",
-      "src": [
-        "test/cpp/server/thread_pool_test.cc"
-      ],
-      "deps": [
-        "grpc_test_util",
-        "grpc++",
-        "grpc",
-        "gpr_test_util",
-        "gpr"
-      ]
-    },
     {
       "name": "thread_stress_test",
       "build": "test",
diff --git a/doc/interop-test-descriptions.md b/doc/interop-test-descriptions.md
index c1b3394596b..3ee5d0f0320 100644
--- a/doc/interop-test-descriptions.md
+++ b/doc/interop-test-descriptions.md
@@ -396,14 +396,23 @@ Asserts:
 
 Similar to the other auth tests, this test is only for cloud-to-prod path.
 
-This test verifies unary calls succeed in sending messages using an OAuth2 token that is obtained OOB.  For the purpose of the test, the OAuth2 token is actually obtained from the service account credentials via the language-specific authorization library.  
+This test verifies unary calls succeed in sending messages using an OAuth2 token
+that is obtained out of band. For the purpose of the test, the OAuth2 token is
+actually obtained from the service account credentials via the
+language-specific authorization library.
 
-The difference between this test and the other auth tests is that rather than configuring the test client with ServiceAccountCredentials directly, the test first uses the authorization library to obtain an authorization token.
+The difference between this test and the other auth tests is that rather than
+configuring the test client with ServiceAccountCredentials directly, the test
+first uses the authorization library to obtain an authorization token.
 
 The test
-- uses the flag`--service_account_key_file` with the path to a json key file
-downloaded from https://console.developers.google.com. Alternately, if using a usable auth implementation, it may specify the file location in the environment variable GOOGLE_APPLICATION_CREDENTIALS
-- uses the flag `--oauth_scope` for the oauth scope.  For testing against grpc-test.sandbox.google.com, "https://www.googleapis.com/auth/xapi.zoo" should be passed as the `--oauth_scope`.
+- uses the flag `--service_account_key_file` with the path to a json key file
+downloaded from https://console.developers.google.com. Alternately, if using a
+usable auth implementation, it may specify the file location in the environment
+variable GOOGLE_APPLICATION_CREDENTIALS
+- uses the flag `--oauth_scope` for the oauth scope.  For testing against
+grpc-test.sandbox.google.com, "https://www.googleapis.com/auth/xapi.zoo" should
+be passed as the `--oauth_scope`.
 
 Server features:
 * [UnaryCall][]
@@ -412,16 +421,12 @@ Server features:
 * [Echo OAuth Scope][]
 
 Procedure:
- 1. Client use the auth library to obtain an authorization token
- 2. Client calls UnaryCall, attaching the authorization token obtained in step1, with the following message
+ 1. Client uses the auth library to obtain an authorization token
+ 2. Client configures the channel to use AccessTokenCredentials with the access token obtained in step 1.
+ 3. Client calls UnaryCall with the following message
 
     ```
     {
-      response_type: COMPRESSABLE
-      response_size: 314159
-      payload:{
-        body: 271828 bytes of zeros
-      }
       fill_username: true
       fill_oauth_scope: true
     }
@@ -429,11 +434,53 @@ Procedure:
     
 Asserts:
 * call was successful
-* received SimpleResponse.username is in the json key file used by the auth library to obtain the authorization token
+* received SimpleResponse.username is in the json key file used by the auth
+library to obtain the authorization token
+* received SimpleResponse.oauth_scope is in `--oauth_scope`
+
+### per_rpc_creds
+
+Similar to the other auth tests, this test is only for cloud-to-prod path.
+
+This test verifies unary calls succeed in sending messages using an OAuth2 token
+that is obtained out of band. For the purpose of the test, the OAuth2 token is
+actually obtained from the service account credentials via the
+language-specific authorization library.
+
+The test
+- uses the flag `--service_account_key_file` with the path to a json key file
+downloaded from https://console.developers.google.com. Alternately, if using a
+usable auth implementation, it may specify the file location in the environment
+variable GOOGLE_APPLICATION_CREDENTIALS
+- uses the flag `--oauth_scope` for the oauth scope.  For testing against
+grpc-test.sandbox.google.com, "https://www.googleapis.com/auth/xapi.zoo" should
+be passed as the `--oauth_scope`.
+
+Server features:
+* [UnaryCall][]
+* [Compressable Payload][]
+* [Echo Authenticated Username][]
+* [Echo OAuth Scope][]
+
+Procedure:
+ 1. Client uses the auth library to obtain an authorization token
+ 2. Client configures the channel with just SSL credentials.
+ 3. Client calls UnaryCall, setting per-call credentials to
+ AccessTokenCredentials with the access token obtained in step 1. The request is
+ the following message
+
+    ```
+    {
+      fill_username: true
+      fill_oauth_scope: true
+    }
+    ```
+    
+Asserts:
+* call was successful
+* received SimpleResponse.username is in the json key file used by the auth
+library to obtain the authorization token
 * received SimpleResponse.oauth_scope is in `--oauth_scope`
-* response payload body is 314159 bytes in size
-* clients are free to assert that the response payload body contents are zero
-  and comparing the entire response message against a golden response
 
 
 ### Metadata (TODO: fix name)
diff --git a/src/cpp/server/thread_pool.h b/include/grpc++/fixed_size_thread_pool.h
similarity index 93%
rename from src/cpp/server/thread_pool.h
rename to include/grpc++/fixed_size_thread_pool.h
index 3b70249bf9a..9f0cbfbae97 100644
--- a/src/cpp/server/thread_pool.h
+++ b/include/grpc++/fixed_size_thread_pool.h
@@ -45,10 +45,10 @@
 
 namespace grpc {
 
-class ThreadPool GRPC_FINAL : public ThreadPoolInterface {
+class FixedSizeThreadPool GRPC_FINAL : public ThreadPoolInterface {
  public:
-  explicit ThreadPool(int num_threads);
-  ~ThreadPool();
+  explicit FixedSizeThreadPool(int num_threads);
+  ~FixedSizeThreadPool();
 
   void ScheduleCallback(const std::function<void()>& callback) GRPC_OVERRIDE;
 
@@ -62,8 +62,6 @@ class ThreadPool GRPC_FINAL : public ThreadPoolInterface {
   void ThreadFunc();
 };
 
-ThreadPoolInterface* CreateDefaultThreadPool();
-
 }  // namespace grpc
 
 #endif  // GRPC_INTERNAL_CPP_SERVER_THREAD_POOL_H
diff --git a/include/grpc++/thread_pool_interface.h b/include/grpc++/thread_pool_interface.h
index ead307f6a2f..ac4458d5303 100644
--- a/include/grpc++/thread_pool_interface.h
+++ b/include/grpc++/thread_pool_interface.h
@@ -47,6 +47,8 @@ class ThreadPoolInterface {
   virtual void ScheduleCallback(const std::function<void()>& callback) = 0;
 };
 
+ThreadPoolInterface* CreateDefaultThreadPool();
+
 }  // namespace grpc
 
 #endif  // GRPCXX_THREAD_POOL_INTERFACE_H
diff --git a/src/compiler/csharp_generator.cc b/src/compiler/csharp_generator.cc
index ccb0b688b6b..1910e9bd2de 100644
--- a/src/compiler/csharp_generator.cc
+++ b/src/compiler/csharp_generator.cc
@@ -257,7 +257,7 @@ void GenerateStaticMethodField(Printer* out, const MethodDescriptor *method) {
 }
 
 void GenerateClientInterface(Printer* out, const ServiceDescriptor *service) {
-  out->Print("// client-side stub interface\n");
+  out->Print("// client interface\n");
   out->Print("public interface $name$\n", "name",
              GetClientInterfaceName(service));
   out->Print("{\n");
@@ -269,7 +269,7 @@ void GenerateClientInterface(Printer* out, const ServiceDescriptor *service) {
     if (method_type == METHODTYPE_NO_STREAMING) {
       // unary calls have an extra synchronous stub method
       out->Print(
-          "$response$ $methodname$($request$ request, CancellationToken token = default(CancellationToken));\n",
+          "$response$ $methodname$($request$ request, Metadata headers = null, CancellationToken cancellationToken = default(CancellationToken));\n",
           "methodname", method->name(), "request",
           GetClassName(method->input_type()), "response",
           GetClassName(method->output_type()));
@@ -280,7 +280,7 @@ void GenerateClientInterface(Printer* out, const ServiceDescriptor *service) {
       method_name += "Async";  // prevent name clash with synchronous method.
     }
     out->Print(
-        "$returntype$ $methodname$($request_maybe$CancellationToken token = default(CancellationToken));\n",
+        "$returntype$ $methodname$($request_maybe$Metadata headers = null, CancellationToken cancellationToken = default(CancellationToken));\n",
         "methodname", method_name, "request_maybe",
         GetMethodRequestParamMaybe(method), "returntype",
         GetMethodReturnTypeClient(method));
@@ -312,7 +312,7 @@ void GenerateServerInterface(Printer* out, const ServiceDescriptor *service) {
 void GenerateClientStub(Printer* out, const ServiceDescriptor *service) {
   out->Print("// client stub\n");
   out->Print(
-      "public class $name$ : AbstractStub<$name$, StubConfiguration>, $interface$\n",
+      "public class $name$ : ClientBase, $interface$\n",
       "name", GetClientClassName(service), "interface",
       GetClientInterfaceName(service));
   out->Print("{\n");
@@ -320,12 +320,7 @@ void GenerateClientStub(Printer* out, const ServiceDescriptor *service) {
 
   // constructors
   out->Print(
-      "public $name$(Channel channel) : this(channel, StubConfiguration.Default)\n",
-      "name", GetClientClassName(service));
-  out->Print("{\n");
-  out->Print("}\n");
-  out->Print(
-      "public $name$(Channel channel, StubConfiguration config) : base(channel, config)\n",
+      "public $name$(Channel channel) : base(channel)\n",
       "name", GetClientClassName(service));
   out->Print("{\n");
   out->Print("}\n");
@@ -337,16 +332,16 @@ void GenerateClientStub(Printer* out, const ServiceDescriptor *service) {
     if (method_type == METHODTYPE_NO_STREAMING) {
       // unary calls have an extra synchronous stub method
       out->Print(
-          "public $response$ $methodname$($request$ request, CancellationToken token = default(CancellationToken))\n",
+          "public $response$ $methodname$($request$ request, Metadata headers = null, CancellationToken cancellationToken = default(CancellationToken))\n",
           "methodname", method->name(), "request",
           GetClassName(method->input_type()), "response",
           GetClassName(method->output_type()));
       out->Print("{\n");
       out->Indent();
-      out->Print("var call = CreateCall($servicenamefield$, $methodfield$);\n",
+      out->Print("var call = CreateCall($servicenamefield$, $methodfield$, headers);\n",
                  "servicenamefield", GetServiceNameFieldName(), "methodfield",
                  GetMethodFieldName(method));
-      out->Print("return Calls.BlockingUnaryCall(call, request, token);\n");
+      out->Print("return Calls.BlockingUnaryCall(call, request, cancellationToken);\n");
       out->Outdent();
       out->Print("}\n");
     }
@@ -356,28 +351,28 @@ void GenerateClientStub(Printer* out, const ServiceDescriptor *service) {
       method_name += "Async";  // prevent name clash with synchronous method.
     }
     out->Print(
-        "public $returntype$ $methodname$($request_maybe$CancellationToken token = default(CancellationToken))\n",
+        "public $returntype$ $methodname$($request_maybe$Metadata headers = null, CancellationToken cancellationToken = default(CancellationToken))\n",
         "methodname", method_name, "request_maybe",
         GetMethodRequestParamMaybe(method), "returntype",
         GetMethodReturnTypeClient(method));
     out->Print("{\n");
     out->Indent();
-    out->Print("var call = CreateCall($servicenamefield$, $methodfield$);\n",
+    out->Print("var call = CreateCall($servicenamefield$, $methodfield$, headers);\n",
                "servicenamefield", GetServiceNameFieldName(), "methodfield",
                GetMethodFieldName(method));
     switch (GetMethodType(method)) {
       case METHODTYPE_NO_STREAMING:
-        out->Print("return Calls.AsyncUnaryCall(call, request, token);\n");
+        out->Print("return Calls.AsyncUnaryCall(call, request, cancellationToken);\n");
         break;
       case METHODTYPE_CLIENT_STREAMING:
-        out->Print("return Calls.AsyncClientStreamingCall(call, token);\n");
+        out->Print("return Calls.AsyncClientStreamingCall(call, cancellationToken);\n");
         break;
       case METHODTYPE_SERVER_STREAMING:
         out->Print(
-            "return Calls.AsyncServerStreamingCall(call, request, token);\n");
+            "return Calls.AsyncServerStreamingCall(call, request, cancellationToken);\n");
         break;
       case METHODTYPE_BIDI_STREAMING:
-        out->Print("return Calls.AsyncDuplexStreamingCall(call, token);\n");
+        out->Print("return Calls.AsyncDuplexStreamingCall(call, cancellationToken);\n");
         break;
       default:
         GOOGLE_LOG(FATAL)<< "Can't get here.";
@@ -423,9 +418,9 @@ void GenerateBindServiceMethod(Printer* out, const ServiceDescriptor *service) {
 }
 
 void GenerateNewStubMethods(Printer* out, const ServiceDescriptor *service) {
-  out->Print("// creates a new client stub\n");
-  out->Print("public static $interface$ NewStub(Channel channel)\n",
-             "interface", GetClientInterfaceName(service));
+  out->Print("// creates a new client\n");
+  out->Print("public static $classname$ NewClient(Channel channel)\n",
+             "classname", GetClientClassName(service));
   out->Print("{\n");
   out->Indent();
   out->Print("return new $classname$(channel);\n", "classname",
@@ -433,17 +428,6 @@ void GenerateNewStubMethods(Printer* out, const ServiceDescriptor *service) {
   out->Outdent();
   out->Print("}\n");
   out->Print("\n");
-
-  out->Print("// creates a new client stub\n");
-  out->Print(
-      "public static $interface$ NewStub(Channel channel, StubConfiguration config)\n",
-      "interface", GetClientInterfaceName(service));
-  out->Print("{\n");
-  out->Indent();
-  out->Print("return new $classname$(channel, config);\n", "classname",
-             GetClientClassName(service));
-  out->Outdent();
-  out->Print("}\n");
 }
 
 void GenerateService(Printer* out, const ServiceDescriptor *service) {
diff --git a/src/core/client_config/uri_parser.c b/src/core/client_config/uri_parser.c
index 776a2559231..410a61c8cf3 100644
--- a/src/core/client_config/uri_parser.c
+++ b/src/core/client_config/uri_parser.c
@@ -98,7 +98,7 @@ grpc_uri *grpc_uri_parse(const char *uri_text, int suppress_errors) {
 
   if (uri_text[scheme_end + 1] == '/' && uri_text[scheme_end + 2] == '/') {
     authority_begin = scheme_end + 3;
-    for (i = authority_begin; uri_text[i] != 0; i++) {
+    for (i = authority_begin; uri_text[i] != 0 && authority_end == -1; i++) {
       if (uri_text[i] == '/') {
         authority_end = i;
       }
diff --git a/src/core/httpcli/httpcli.c b/src/core/httpcli/httpcli.c
index 3f5557e08ee..65997d5f44b 100644
--- a/src/core/httpcli/httpcli.c
+++ b/src/core/httpcli/httpcli.c
@@ -165,6 +165,7 @@ static void start_write(internal_request *req) {
 
 static void on_secure_transport_setup_done(void *rp,
                                            grpc_security_status status,
+                                           grpc_endpoint *wrapped_endpoint,
                                            grpc_endpoint *secure_endpoint) {
   internal_request *req = rp;
   if (status != GRPC_SECURITY_OK) {
diff --git a/src/core/security/secure_transport_setup.c b/src/core/security/secure_transport_setup.c
index 731b382f091..0c3572b53c4 100644
--- a/src/core/security/secure_transport_setup.c
+++ b/src/core/security/secure_transport_setup.c
@@ -47,7 +47,8 @@ typedef struct {
   tsi_handshaker *handshaker;
   unsigned char *handshake_buffer;
   size_t handshake_buffer_size;
-  grpc_endpoint *endpoint;
+  grpc_endpoint *wrapped_endpoint;
+  grpc_endpoint *secure_endpoint;
   gpr_slice_buffer left_overs;
   grpc_secure_transport_setup_done_cb cb;
   void *user_data;
@@ -63,13 +64,16 @@ static void on_handshake_data_sent_to_peer(void *setup,
 static void secure_transport_setup_done(grpc_secure_transport_setup *s,
                                         int is_success) {
   if (is_success) {
-    s->cb(s->user_data, GRPC_SECURITY_OK, s->endpoint);
+    s->cb(s->user_data, GRPC_SECURITY_OK, s->wrapped_endpoint,
+          s->secure_endpoint);
   } else {
-    if (s->endpoint != NULL) {
-      grpc_endpoint_shutdown(s->endpoint);
-      grpc_endpoint_destroy(s->endpoint);
+    if (s->secure_endpoint != NULL) {
+      grpc_endpoint_shutdown(s->secure_endpoint);
+      grpc_endpoint_destroy(s->secure_endpoint);
+    } else {
+      grpc_endpoint_destroy(s->wrapped_endpoint);
     }
-    s->cb(s->user_data, GRPC_SECURITY_ERROR, NULL);
+    s->cb(s->user_data, GRPC_SECURITY_ERROR, s->wrapped_endpoint, NULL);
   }
   if (s->handshaker != NULL) tsi_handshaker_destroy(s->handshaker);
   if (s->handshake_buffer != NULL) gpr_free(s->handshake_buffer);
@@ -95,8 +99,9 @@ static void on_peer_checked(void *user_data, grpc_security_status status) {
     secure_transport_setup_done(s, 0);
     return;
   }
-  s->endpoint = grpc_secure_endpoint_create(
-      protector, s->endpoint, s->left_overs.slices, s->left_overs.count);
+  s->secure_endpoint =
+      grpc_secure_endpoint_create(protector, s->wrapped_endpoint,
+                                  s->left_overs.slices, s->left_overs.count);
   secure_transport_setup_done(s, 1);
   return;
 }
@@ -152,7 +157,7 @@ static void send_handshake_bytes_to_peer(grpc_secure_transport_setup *s) {
       gpr_slice_from_copied_buffer((const char *)s->handshake_buffer, offset);
   /* TODO(klempner,jboeuf): This should probably use the client setup
          deadline */
-  write_status = grpc_endpoint_write(s->endpoint, &to_send, 1,
+  write_status = grpc_endpoint_write(s->wrapped_endpoint, &to_send, 1,
                                      on_handshake_data_sent_to_peer, s);
   if (write_status == GRPC_ENDPOINT_WRITE_ERROR) {
     gpr_log(GPR_ERROR, "Could not send handshake data to peer.");
@@ -198,7 +203,7 @@ static void on_handshake_data_received_from_peer(
     if (result == TSI_INCOMPLETE_DATA) {
       /* TODO(klempner,jboeuf): This should probably use the client setup
          deadline */
-      grpc_endpoint_notify_on_read(s->endpoint,
+      grpc_endpoint_notify_on_read(s->wrapped_endpoint,
                                    on_handshake_data_received_from_peer, setup);
       cleanup_slices(slices, nslices);
       return;
@@ -256,7 +261,7 @@ static void on_handshake_data_sent_to_peer(void *setup,
   if (tsi_handshaker_is_in_progress(s->handshaker)) {
     /* TODO(klempner,jboeuf): This should probably use the client setup
        deadline */
-    grpc_endpoint_notify_on_read(s->endpoint,
+    grpc_endpoint_notify_on_read(s->wrapped_endpoint,
                                  on_handshake_data_received_from_peer, setup);
   } else {
     check_peer(s);
@@ -280,7 +285,7 @@ void grpc_setup_secure_transport(grpc_security_connector *connector,
       GRPC_SECURITY_CONNECTOR_REF(connector, "secure_transport_setup");
   s->handshake_buffer_size = GRPC_INITIAL_HANDSHAKE_BUFFER_SIZE;
   s->handshake_buffer = gpr_malloc(s->handshake_buffer_size);
-  s->endpoint = nonsecure_endpoint;
+  s->wrapped_endpoint = nonsecure_endpoint;
   s->user_data = user_data;
   s->cb = cb;
   gpr_slice_buffer_init(&s->left_overs);
diff --git a/src/core/security/secure_transport_setup.h b/src/core/security/secure_transport_setup.h
index 58701c461d9..29025f5236b 100644
--- a/src/core/security/secure_transport_setup.h
+++ b/src/core/security/secure_transport_setup.h
@@ -42,7 +42,7 @@
 /* Ownership of the secure_endpoint is transfered. */
 typedef void (*grpc_secure_transport_setup_done_cb)(
     void *user_data, grpc_security_status status,
-    grpc_endpoint *secure_endpoint);
+    grpc_endpoint *wrapped_endpoint, grpc_endpoint *secure_endpoint);
 
 /* Calls the callback upon completion. */
 void grpc_setup_secure_transport(grpc_security_connector *connector,
diff --git a/src/core/security/server_secure_chttp2.c b/src/core/security/server_secure_chttp2.c
index 8a7ada07af9..3717b8989f4 100644
--- a/src/core/security/server_secure_chttp2.c
+++ b/src/core/security/server_secure_chttp2.c
@@ -51,10 +51,16 @@
 #include <grpc/support/sync.h>
 #include <grpc/support/useful.h>
 
+typedef struct tcp_endpoint_list {
+  grpc_endpoint *tcp_endpoint;
+  struct tcp_endpoint_list *next;
+} tcp_endpoint_list;
+
 typedef struct grpc_server_secure_state {
   grpc_server *server;
   grpc_tcp_server *tcp;
   grpc_security_connector *sc;
+  tcp_endpoint_list *handshaking_tcp_endpoints;
   int is_shutdown;
   gpr_mu mu;
   gpr_refcount refcount;
@@ -88,14 +94,37 @@ static void setup_transport(void *statep, grpc_transport *transport,
   grpc_channel_args_destroy(args_copy);
 }
 
+static int remove_tcp_from_list_locked(grpc_server_secure_state *state,
+                                       grpc_endpoint *tcp) {
+  tcp_endpoint_list *node = state->handshaking_tcp_endpoints;
+  tcp_endpoint_list *tmp = NULL;
+  if (node && node->tcp_endpoint == tcp) {
+    state->handshaking_tcp_endpoints = state->handshaking_tcp_endpoints->next;
+    gpr_free(node);
+    return 0;
+  }
+  while (node) {
+    if (node->next->tcp_endpoint == tcp) {
+      tmp = node->next;
+      node->next = node->next->next;
+      gpr_free(tmp);
+      return 0;
+    }
+    node = node->next;
+  }
+  return -1;
+}
+
 static void on_secure_transport_setup_done(void *statep,
                                            grpc_security_status status,
+                                           grpc_endpoint *wrapped_endpoint,
                                            grpc_endpoint *secure_endpoint) {
   grpc_server_secure_state *state = statep;
   grpc_transport *transport;
   grpc_mdctx *mdctx;
   if (status == GRPC_SECURITY_OK) {
     gpr_mu_lock(&state->mu);
+    remove_tcp_from_list_locked(state, wrapped_endpoint);
     if (!state->is_shutdown) {
       mdctx = grpc_mdctx_create();
       transport = grpc_create_chttp2_transport(
@@ -110,6 +139,9 @@ static void on_secure_transport_setup_done(void *statep,
     }
     gpr_mu_unlock(&state->mu);
   } else {
+    gpr_mu_lock(&state->mu);
+    remove_tcp_from_list_locked(state, wrapped_endpoint);
+    gpr_mu_unlock(&state->mu);
     gpr_log(GPR_ERROR, "Secure transport failed with error %d", status);
   }
   state_unref(state);
@@ -117,7 +149,14 @@ static void on_secure_transport_setup_done(void *statep,
 
 static void on_accept(void *statep, grpc_endpoint *tcp) {
   grpc_server_secure_state *state = statep;
+  tcp_endpoint_list *node;
   state_ref(state);
+  node = gpr_malloc(sizeof(tcp_endpoint_list));
+  node->tcp_endpoint = tcp;
+  gpr_mu_lock(&state->mu);
+  node->next = state->handshaking_tcp_endpoints;
+  state->handshaking_tcp_endpoints = node;
+  gpr_mu_unlock(&state->mu);
   grpc_setup_secure_transport(state->sc, tcp, on_secure_transport_setup_done,
                               state);
 }
@@ -132,6 +171,13 @@ static void start(grpc_server *server, void *statep, grpc_pollset **pollsets,
 static void destroy_done(void *statep) {
   grpc_server_secure_state *state = statep;
   grpc_server_listener_destroy_done(state->server);
+  gpr_mu_lock(&state->mu);
+  while (state->handshaking_tcp_endpoints != NULL) {
+    grpc_endpoint_shutdown(state->handshaking_tcp_endpoints->tcp_endpoint);
+    remove_tcp_from_list_locked(state,
+                                state->handshaking_tcp_endpoints->tcp_endpoint);
+  }
+  gpr_mu_unlock(&state->mu);
   state_unref(state);
 }
 
@@ -209,6 +255,7 @@ int grpc_server_add_secure_http2_port(grpc_server *server, const char *addr,
   state->server = server;
   state->tcp = tcp;
   state->sc = sc;
+  state->handshaking_tcp_endpoints = NULL;
   state->is_shutdown = 0;
   gpr_mu_init(&state->mu);
   gpr_ref_init(&state->refcount, 1);
diff --git a/src/core/surface/secure_channel_create.c b/src/core/surface/secure_channel_create.c
index 1836d3913a1..9fa12059dd7 100644
--- a/src/core/surface/secure_channel_create.c
+++ b/src/core/surface/secure_channel_create.c
@@ -75,6 +75,7 @@ static void connector_unref(grpc_connector *con) {
 
 static void on_secure_transport_setup_done(void *arg,
                                            grpc_security_status status,
+                                           grpc_endpoint *wrapped_endpoint,
                                            grpc_endpoint *secure_endpoint) {
   connector *c = arg;
   grpc_iomgr_closure *notify;
diff --git a/src/cpp/server/create_default_thread_pool.cc b/src/cpp/server/create_default_thread_pool.cc
index 89c1d7e9295..cc182f59f4e 100644
--- a/src/cpp/server/create_default_thread_pool.cc
+++ b/src/cpp/server/create_default_thread_pool.cc
@@ -32,7 +32,7 @@
  */
 
 #include <grpc/support/cpu.h>
-#include "src/cpp/server/thread_pool.h"
+#include <grpc++/fixed_size_thread_pool.h>
 
 #ifndef GRPC_CUSTOM_DEFAULT_THREAD_POOL
 
@@ -41,7 +41,7 @@ namespace grpc {
 ThreadPoolInterface* CreateDefaultThreadPool() {
    int cores = gpr_cpu_num_cores();
    if (!cores) cores = 4;
-   return new ThreadPool(cores);
+   return new FixedSizeThreadPool(cores);
 }
 
 }  // namespace grpc
diff --git a/src/cpp/server/thread_pool.cc b/src/cpp/server/fixed_size_thread_pool.cc
similarity index 86%
rename from src/cpp/server/thread_pool.cc
rename to src/cpp/server/fixed_size_thread_pool.cc
index 118cabcb612..710bcbb5737 100644
--- a/src/cpp/server/thread_pool.cc
+++ b/src/cpp/server/fixed_size_thread_pool.cc
@@ -33,12 +33,11 @@
 
 #include <grpc++/impl/sync.h>
 #include <grpc++/impl/thd.h>
-
-#include "src/cpp/server/thread_pool.h"
+#include <grpc++/fixed_size_thread_pool.h>
 
 namespace grpc {
 
-void ThreadPool::ThreadFunc() {
+void FixedSizeThreadPool::ThreadFunc() {
   for (;;) {
     // Wait until work is available or we are shutting down.
     grpc::unique_lock<grpc::mutex> lock(mu_);
@@ -58,13 +57,14 @@ void ThreadPool::ThreadFunc() {
   }
 }
 
-ThreadPool::ThreadPool(int num_threads) : shutdown_(false) {
+FixedSizeThreadPool::FixedSizeThreadPool(int num_threads) : shutdown_(false) {
   for (int i = 0; i < num_threads; i++) {
-    threads_.push_back(new grpc::thread(&ThreadPool::ThreadFunc, this));
+    threads_.push_back(
+        new grpc::thread(&FixedSizeThreadPool::ThreadFunc, this));
   }
 }
 
-ThreadPool::~ThreadPool() {
+FixedSizeThreadPool::~FixedSizeThreadPool() {
   {
     grpc::lock_guard<grpc::mutex> lock(mu_);
     shutdown_ = true;
@@ -76,7 +76,8 @@ ThreadPool::~ThreadPool() {
   }
 }
 
-void ThreadPool::ScheduleCallback(const std::function<void()>& callback) {
+void FixedSizeThreadPool::ScheduleCallback(
+    const std::function<void()>& callback) {
   grpc::lock_guard<grpc::mutex> lock(mu_);
   callbacks_.push(callback);
   cv_.notify_one();
diff --git a/src/cpp/server/server_builder.cc b/src/cpp/server/server_builder.cc
index 86c78f05ff9..f723d4611ae 100644
--- a/src/cpp/server/server_builder.cc
+++ b/src/cpp/server/server_builder.cc
@@ -37,7 +37,7 @@
 #include <grpc/support/log.h>
 #include <grpc++/impl/service_type.h>
 #include <grpc++/server.h>
-#include "src/cpp/server/thread_pool.h"
+#include <grpc++/thread_pool_interface.h>
 
 namespace grpc {
 
diff --git a/src/csharp/Grpc.Auth/OAuth2InterceptorFactory.cs b/src/csharp/Grpc.Auth/OAuth2InterceptorFactory.cs
index ca384d1a6e4..420c4cb5371 100644
--- a/src/csharp/Grpc.Auth/OAuth2InterceptorFactory.cs
+++ b/src/csharp/Grpc.Auth/OAuth2InterceptorFactory.cs
@@ -52,10 +52,10 @@ namespace Grpc.Auth
         /// <summary>
         /// Creates OAuth2 interceptor.
         /// </summary>
-        public static HeaderInterceptorDelegate Create(GoogleCredential googleCredential)
+        public static MetadataInterceptorDelegate Create(GoogleCredential googleCredential)
         {
             var interceptor = new OAuth2Interceptor(googleCredential.InternalCredential, SystemClock.Default);
-            return new HeaderInterceptorDelegate(interceptor.InterceptHeaders);
+            return new MetadataInterceptorDelegate(interceptor.InterceptHeaders);
         }
 
         /// <summary>
@@ -94,10 +94,10 @@ namespace Grpc.Auth
                 return credential.Token.AccessToken;
             }
 
-            public void InterceptHeaders(Metadata.Builder headerBuilder)
+            public void InterceptHeaders(Metadata metadata)
             {
                 var accessToken = GetAccessToken(CancellationToken.None);
-                headerBuilder.Add(new Metadata.MetadataEntry(AuthorizationHeader, Schema + " " + accessToken));
+                metadata.Add(new Metadata.Entry(AuthorizationHeader, Schema + " " + accessToken));
             }
         }
     }
diff --git a/src/csharp/Grpc.Core.Tests/Internal/MetadataArraySafeHandleTest.cs b/src/csharp/Grpc.Core.Tests/Internal/MetadataArraySafeHandleTest.cs
index 2f6013483d9..320423b245d 100644
--- a/src/csharp/Grpc.Core.Tests/Internal/MetadataArraySafeHandleTest.cs
+++ b/src/csharp/Grpc.Core.Tests/Internal/MetadataArraySafeHandleTest.cs
@@ -44,17 +44,17 @@ namespace Grpc.Core.Internal.Tests
         [Test]
         public void CreateEmptyAndDestroy()
         {
-            var metadata = Metadata.CreateBuilder().Build();
-            var nativeMetadata = MetadataArraySafeHandle.Create(metadata);
+            var nativeMetadata = MetadataArraySafeHandle.Create(new Metadata());
             nativeMetadata.Dispose();
         }
 
         [Test]
         public void CreateAndDestroy()
         {
-            var metadata = Metadata.CreateBuilder()
-                .Add(new Metadata.MetadataEntry("host", "somehost"))
-                .Add(new Metadata.MetadataEntry("header2", "header value")).Build();
+            var metadata = new Metadata {
+                new Metadata.Entry("host", "somehost"),
+                new Metadata.Entry("header2", "header value"),
+            };
             var nativeMetadata = MetadataArraySafeHandle.Create(metadata);
             nativeMetadata.Dispose();
         }
diff --git a/src/csharp/Grpc.Core/Calls.cs b/src/csharp/Grpc.Core/Calls.cs
index 750282258f2..9e95182c720 100644
--- a/src/csharp/Grpc.Core/Calls.cs
+++ b/src/csharp/Grpc.Core/Calls.cs
@@ -39,7 +39,7 @@ using Grpc.Core.Internal;
 namespace Grpc.Core
 {
     /// <summary>
-    /// Helper methods for generated client stubs to make RPC calls.
+    /// Helper methods for generated clients to make RPC calls.
     /// </summary>
     public static class Calls
     {
diff --git a/src/csharp/Grpc.Core/Stub/AbstractStub.cs b/src/csharp/Grpc.Core/ClientBase.cs
similarity index 70%
rename from src/csharp/Grpc.Core/Stub/AbstractStub.cs
rename to src/csharp/Grpc.Core/ClientBase.cs
index 4a8b2543579..a099f96aeab 100644
--- a/src/csharp/Grpc.Core/Stub/AbstractStub.cs
+++ b/src/csharp/Grpc.Core/ClientBase.cs
@@ -32,26 +32,39 @@
 #endregion
 
 using System;
+using System.Collections.Generic;
+
 using Grpc.Core.Internal;
 
 namespace Grpc.Core
 {
-    // TODO: support adding timeout to methods.
+    public delegate void MetadataInterceptorDelegate(Metadata metadata);
+
     /// <summary>
-    /// Base for client-side stubs.
+    /// Base class for client-side stubs.
     /// </summary>
-    public abstract class AbstractStub<TStub, TConfig>
-        where TConfig : StubConfiguration
+    public abstract class ClientBase
     {
         readonly Channel channel;
-        readonly TConfig config;
 
-        public AbstractStub(Channel channel, TConfig config)
+        public ClientBase(Channel channel)
         {
             this.channel = channel;
-            this.config = config;
         }
 
+        /// <summary>
+        /// Can be used to register a custom header (initial metadata) interceptor.
+        /// The delegate each time before a new call on this client is started.
+        /// </summary>
+        public MetadataInterceptorDelegate HeaderInterceptor
+        {
+            get;
+            set;
+        }
+
+        /// <summary>
+        /// Channel associated with this client.
+        /// </summary>
         public Channel Channel
         {
             get
@@ -63,13 +76,19 @@ namespace Grpc.Core
         /// <summary>
         /// Creates a new call to given method.
         /// </summary>
-        protected Call<TRequest, TResponse> CreateCall<TRequest, TResponse>(string serviceName, Method<TRequest, TResponse> method)
+        protected Call<TRequest, TResponse> CreateCall<TRequest, TResponse>(string serviceName, Method<TRequest, TResponse> method, Metadata metadata)
             where TRequest : class
             where TResponse : class
         {
-            var headerBuilder = Metadata.CreateBuilder();
-            config.HeaderInterceptor(headerBuilder);
-            return new Call<TRequest, TResponse>(serviceName, method, channel, headerBuilder.Build());
+            var interceptor = HeaderInterceptor;
+            if (interceptor != null)
+            {
+                metadata = metadata ?? new Metadata();
+                interceptor(metadata);
+                metadata.Freeze();
+            }
+            metadata = metadata ?? Metadata.Empty;
+            return new Call<TRequest, TResponse>(serviceName, method, channel, metadata);
         }
     }
 }
diff --git a/src/csharp/Grpc.Core/Grpc.Core.csproj b/src/csharp/Grpc.Core/Grpc.Core.csproj
index cde42c3b7e2..a227fe54778 100644
--- a/src/csharp/Grpc.Core/Grpc.Core.csproj
+++ b/src/csharp/Grpc.Core/Grpc.Core.csproj
@@ -88,8 +88,7 @@
     <Compile Include="ServerCredentials.cs" />
     <Compile Include="Metadata.cs" />
     <Compile Include="Internal\MetadataArraySafeHandle.cs" />
-    <Compile Include="Stub\AbstractStub.cs" />
-    <Compile Include="Stub\StubConfiguration.cs" />
+    <Compile Include="ClientBase.cs" />
     <Compile Include="Internal\ServerCalls.cs" />
     <Compile Include="ServerMethods.cs" />
     <Compile Include="Internal\ClientRequestStream.cs" />
diff --git a/src/csharp/Grpc.Core/Internal/MetadataArraySafeHandle.cs b/src/csharp/Grpc.Core/Internal/MetadataArraySafeHandle.cs
index c9c4d954c91..80aa7f56034 100644
--- a/src/csharp/Grpc.Core/Internal/MetadataArraySafeHandle.cs
+++ b/src/csharp/Grpc.Core/Internal/MetadataArraySafeHandle.cs
@@ -54,11 +54,11 @@ namespace Grpc.Core.Internal
 
         public static MetadataArraySafeHandle Create(Metadata metadata)
         {
-            var entries = metadata.Entries;
-            var metadataArray = grpcsharp_metadata_array_create(new UIntPtr((ulong)entries.Count));
-            for (int i = 0; i < entries.Count; i++)
+            // TODO(jtattermusch): we might wanna check that the metadata is readonly 
+            var metadataArray = grpcsharp_metadata_array_create(new UIntPtr((ulong)metadata.Count));
+            for (int i = 0; i < metadata.Count; i++)
             {
-                grpcsharp_metadata_array_add(metadataArray, entries[i].Key, entries[i].ValueBytes, new UIntPtr((ulong)entries[i].ValueBytes.Length));
+                grpcsharp_metadata_array_add(metadataArray, metadata[i].Key, metadata[i].ValueBytes, new UIntPtr((ulong)metadata[i].ValueBytes.Length));
             }
             return metadataArray;
         }
diff --git a/src/csharp/Grpc.Core/Metadata.cs b/src/csharp/Grpc.Core/Metadata.cs
index eccec26a616..4552d39d88e 100644
--- a/src/csharp/Grpc.Core/Metadata.cs
+++ b/src/csharp/Grpc.Core/Metadata.cs
@@ -30,55 +30,163 @@
 #endregion
 
 using System;
+using System.Collections;
 using System.Collections.Generic;
 using System.Collections.Immutable;
+using System.Collections.Specialized;
 using System.Runtime.InteropServices;
 using System.Text;
 
+using Grpc.Core.Utils;
+
 namespace Grpc.Core
 {
     /// <summary>
-    /// gRPC call metadata.
+    /// Provides access to read and write metadata values to be exchanged during a call.
     /// </summary>
-    public class Metadata
+    public sealed class Metadata : IList<Metadata.Entry>
     {
-        public static readonly Metadata Empty = new Metadata(ImmutableList<MetadataEntry>.Empty);
+        /// <summary>
+        /// An read-only instance of metadata containing no entries.
+        /// </summary>
+        public static readonly Metadata Empty = new Metadata().Freeze();
+
+        readonly List<Entry> entries;
+        bool readOnly;
+
+        public Metadata()
+        {
+            this.entries = new List<Entry>();
+        }
+
+        public Metadata(ICollection<Entry> entries)
+        {
+            this.entries = new List<Entry>(entries);
+        }
+
+        /// <summary>
+        /// Makes this object read-only.
+        /// </summary>
+        /// <returns>this object</returns>
+        public Metadata Freeze()
+        {
+            this.readOnly = true;
+            return this;
+        }
+
+        // TODO: add support for access by key
+
+        #region IList members
+
+        public int IndexOf(Metadata.Entry item)
+        {
+            return entries.IndexOf(item);
+        }
 
-        readonly ImmutableList<MetadataEntry> entries;
+        public void Insert(int index, Metadata.Entry item)
+        {
+            CheckWriteable();
+            entries.Insert(index, item);
+        }
 
-        public Metadata(ImmutableList<MetadataEntry> entries)
+        public void RemoveAt(int index)
         {
-            this.entries = entries;
+            CheckWriteable();
+            entries.RemoveAt(index);
         }
 
-        public ImmutableList<MetadataEntry> Entries
+        public Metadata.Entry this[int index]
         {
             get
             {
-                return this.entries;
+                return entries[index];
+            }
+
+            set
+            {
+                CheckWriteable();
+                entries[index] = value;
             }
         }
 
-        public static Builder CreateBuilder()
+        public void Add(Metadata.Entry item)
+        {
+            CheckWriteable();
+            entries.Add(item);
+        }
+
+        public void Clear()
+        {
+            CheckWriteable();
+            entries.Clear();
+        }
+
+        public bool Contains(Metadata.Entry item)
+        {
+            return entries.Contains(item);
+        }
+
+        public void CopyTo(Metadata.Entry[] array, int arrayIndex)
         {
-            return new Builder();
+            entries.CopyTo(array, arrayIndex);
         }
-       
-        public struct MetadataEntry
+
+        public int Count
+        {
+            get { return entries.Count; }
+        }
+
+        public bool IsReadOnly
+        {
+            get { return readOnly; }
+        }
+
+        public bool Remove(Metadata.Entry item)
+        {
+            CheckWriteable();
+            return entries.Remove(item);
+        }
+
+        public IEnumerator<Metadata.Entry> GetEnumerator()
+        {
+            return entries.GetEnumerator();
+        }
+
+        IEnumerator System.Collections.IEnumerable.GetEnumerator()
+        {
+            return entries.GetEnumerator();
+        }
+
+        private void CheckWriteable()
+        {
+            Preconditions.CheckState(!readOnly, "Object is read only");
+        }
+
+        #endregion
+
+        /// <summary>
+        /// Metadata entry
+        /// </summary>
+        public struct Entry
         {
+            private static readonly Encoding Encoding = Encoding.ASCII;
+
             readonly string key;
-            readonly byte[] valueBytes;
+            string value;
+            byte[] valueBytes;
 
-            public MetadataEntry(string key, byte[] valueBytes)
+            public Entry(string key, byte[] valueBytes)
             {
-                this.key = key;
-                this.valueBytes = valueBytes;
+                this.key = Preconditions.CheckNotNull(key);
+                this.value = null;
+                this.valueBytes = Preconditions.CheckNotNull(valueBytes);
             }
 
-            public MetadataEntry(string key, string value)
+            public Entry(string key, string value)
             {
-                this.key = key;
-                this.valueBytes = Encoding.ASCII.GetBytes(value);
+                this.key = Preconditions.CheckNotNull(key);
+                this.value = Preconditions.CheckNotNull(value);
+                this.valueBytes = null;
             }
 
             public string Key
@@ -89,38 +197,29 @@ namespace Grpc.Core
                 }
             }
 
-            // TODO: using ByteString would guarantee immutability.
             public byte[] ValueBytes
             {
                 get
                 {
-                    return this.valueBytes;
+                    if (valueBytes == null)
+                    {
+                        valueBytes = Encoding.GetBytes(value);
+                    }
+                    return valueBytes;
                 }
             }
-        }
 
-        public class Builder
-        {
-            readonly List<Metadata.MetadataEntry> entries = new List<Metadata.MetadataEntry>();
-
-            public List<MetadataEntry> Entries
+            public string Value
             {
                 get
                 {
-                    return entries;
+                    if (value == null)
+                    {
+                        value = Encoding.GetString(valueBytes);
+                    }
+                    return value;
                 }
             }
-
-            public Builder Add(MetadataEntry entry)
-            {
-                entries.Add(entry);
-                return this;
-            }
-
-            public Metadata Build()
-            {
-                return new Metadata(entries.ToImmutableList());
-            }
         }
     }
 }
diff --git a/src/csharp/Grpc.Core/Stub/StubConfiguration.cs b/src/csharp/Grpc.Core/Stub/StubConfiguration.cs
deleted file mode 100644
index 5bcb5b40d2d..00000000000
--- a/src/csharp/Grpc.Core/Stub/StubConfiguration.cs
+++ /dev/null
@@ -1,64 +0,0 @@
-#region Copyright notice and license
-
-// Copyright 2015, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-#endregion
-
-using System;
-using Grpc.Core.Internal;
-using Grpc.Core.Utils;
-
-namespace Grpc.Core
-{
-    public delegate void HeaderInterceptorDelegate(Metadata.Builder headerBuilder);
-
-    public class StubConfiguration
-    {
-        /// <summary>
-        /// The default stub configuration.
-        /// </summary>
-        public static readonly StubConfiguration Default = new StubConfiguration((headerBuilder) => { });
-
-        readonly HeaderInterceptorDelegate headerInterceptor;
-
-        public StubConfiguration(HeaderInterceptorDelegate headerInterceptor)
-        {
-            this.headerInterceptor = Preconditions.CheckNotNull(headerInterceptor);
-        }
-
-        public HeaderInterceptorDelegate HeaderInterceptor
-        {
-            get
-            {
-                return headerInterceptor;
-            }
-        }
-    }
-}
diff --git a/src/csharp/Grpc.Core/Version.cs b/src/csharp/Grpc.Core/Version.cs
index 972f495bd7d..f1db1f61578 100644
--- a/src/csharp/Grpc.Core/Version.cs
+++ b/src/csharp/Grpc.Core/Version.cs
@@ -3,4 +3,3 @@ using System.Runtime.CompilerServices;
 
 // The current version of gRPC C#.
 [assembly: AssemblyVersion("0.6.0.*")]
-
diff --git a/src/csharp/Grpc.Examples.MathClient/MathClient.cs b/src/csharp/Grpc.Examples.MathClient/MathClient.cs
index b7637214600..cfe2a069160 100644
--- a/src/csharp/Grpc.Examples.MathClient/MathClient.cs
+++ b/src/csharp/Grpc.Examples.MathClient/MathClient.cs
@@ -41,18 +41,18 @@ namespace math
         {
             using (Channel channel = new Channel("127.0.0.1", 23456))
             {
-                Math.IMathClient stub = new Math.MathClient(channel);
-                MathExamples.DivExample(stub);
+                Math.IMathClient client = new Math.MathClient(channel);
+                MathExamples.DivExample(client);
 
-                MathExamples.DivAsyncExample(stub).Wait();
+                MathExamples.DivAsyncExample(client).Wait();
 
-                MathExamples.FibExample(stub).Wait();
+                MathExamples.FibExample(client).Wait();
 
-                MathExamples.SumExample(stub).Wait();
+                MathExamples.SumExample(client).Wait();
 
-                MathExamples.DivManyExample(stub).Wait();
+                MathExamples.DivManyExample(client).Wait();
 
-                MathExamples.DependendRequestsExample(stub).Wait();
+                MathExamples.DependendRequestsExample(client).Wait();
             }
 
             GrpcEnvironment.Shutdown();
diff --git a/src/csharp/Grpc.Examples.Tests/MathClientServerTests.cs b/src/csharp/Grpc.Examples.Tests/MathClientServerTests.cs
index 10dceb60aaa..e7c4b331208 100644
--- a/src/csharp/Grpc.Examples.Tests/MathClientServerTests.cs
+++ b/src/csharp/Grpc.Examples.Tests/MathClientServerTests.cs
@@ -49,7 +49,7 @@ namespace math.Tests
         string host = "localhost";
         Server server;
         Channel channel;
-        Math.IMathClient client;
+        Math.MathClient client;
 
         [TestFixtureSetUp]
         public void Init()
@@ -59,14 +59,14 @@ namespace math.Tests
             int port = server.AddListeningPort(host, Server.PickUnusedPort);
             server.Start();
             channel = new Channel(host, port);
+            client = Math.NewClient(channel);
 
             // TODO(jtattermusch): get rid of the custom header here once we have dedicated tests
             // for header support.
-            var stubConfig = new StubConfiguration((headerBuilder) =>
+            client.HeaderInterceptor = (metadata) =>
             {
-                headerBuilder.Add(new Metadata.MetadataEntry("customHeader", "abcdef"));
-            });
-            client = Math.NewStub(channel, stubConfig);
+                metadata.Add(new Metadata.Entry("customHeader", "abcdef"));
+            };
         }
 
         [TestFixtureTearDown]
diff --git a/src/csharp/Grpc.Examples/MathExamples.cs b/src/csharp/Grpc.Examples/MathExamples.cs
index d2cfbee18f7..7deb6516893 100644
--- a/src/csharp/Grpc.Examples/MathExamples.cs
+++ b/src/csharp/Grpc.Examples/MathExamples.cs
@@ -38,29 +38,29 @@ namespace math
 {
     public static class MathExamples
     {
-        public static void DivExample(Math.IMathClient stub)
+        public static void DivExample(Math.IMathClient client)
         {
-            DivReply result = stub.Div(new DivArgs.Builder { Dividend = 10, Divisor = 3 }.Build());
+            DivReply result = client.Div(new DivArgs.Builder { Dividend = 10, Divisor = 3 }.Build());
             Console.WriteLine("Div Result: " + result);
         }
 
-        public static async Task DivAsyncExample(Math.IMathClient stub)
+        public static async Task DivAsyncExample(Math.IMathClient client)
         {
-            Task<DivReply> resultTask = stub.DivAsync(new DivArgs.Builder { Dividend = 4, Divisor = 5 }.Build());
+            Task<DivReply> resultTask = client.DivAsync(new DivArgs.Builder { Dividend = 4, Divisor = 5 }.Build());
             DivReply result = await resultTask;
             Console.WriteLine("DivAsync Result: " + result);
         }
 
-        public static async Task FibExample(Math.IMathClient stub)
+        public static async Task FibExample(Math.IMathClient client)
         {
-            using (var call = stub.Fib(new FibArgs.Builder { Limit = 5 }.Build()))
+            using (var call = client.Fib(new FibArgs.Builder { Limit = 5 }.Build()))
             {
                 List<Num> result = await call.ResponseStream.ToList();
                 Console.WriteLine("Fib Result: " + string.Join("|", result));
             }
         }
 
-        public static async Task SumExample(Math.IMathClient stub)
+        public static async Task SumExample(Math.IMathClient client)
         {
             var numbers = new List<Num>
             {
@@ -69,14 +69,14 @@ namespace math
                 new Num.Builder { Num_ = 3 }.Build()
             };
 
-            using (var call = stub.Sum())
+            using (var call = client.Sum())
             {
                 await call.RequestStream.WriteAll(numbers);
                 Console.WriteLine("Sum Result: " + await call.Result);
             }
         }
 
-        public static async Task DivManyExample(Math.IMathClient stub)
+        public static async Task DivManyExample(Math.IMathClient client)
         {
             var divArgsList = new List<DivArgs>
             {
@@ -84,14 +84,14 @@ namespace math
                 new DivArgs.Builder { Dividend = 100, Divisor = 21 }.Build(),
                 new DivArgs.Builder { Dividend = 7, Divisor = 2 }.Build()
             };
-            using (var call = stub.DivMany())
+            using (var call = client.DivMany())
             { 
                 await call.RequestStream.WriteAll(divArgsList);
                 Console.WriteLine("DivMany Result: " + string.Join("|", await call.ResponseStream.ToList()));
             }
         }
 
-        public static async Task DependendRequestsExample(Math.IMathClient stub)
+        public static async Task DependendRequestsExample(Math.IMathClient client)
         {
             var numbers = new List<Num>
             {
@@ -101,13 +101,13 @@ namespace math
             };
 
             Num sum;
-            using (var sumCall = stub.Sum())
+            using (var sumCall = client.Sum())
             {
                 await sumCall.RequestStream.WriteAll(numbers);
                 sum = await sumCall.Result;
             }
 
-            DivReply result = await stub.DivAsync(new DivArgs.Builder { Dividend = sum.Num_, Divisor = numbers.Count }.Build());
+            DivReply result = await client.DivAsync(new DivArgs.Builder { Dividend = sum.Num_, Divisor = numbers.Count }.Build());
             Console.WriteLine("Avg Result: " + result);
         }
     }
diff --git a/src/csharp/Grpc.Examples/MathGrpc.cs b/src/csharp/Grpc.Examples/MathGrpc.cs
index b9efc44e8c1..1805972ce33 100644
--- a/src/csharp/Grpc.Examples/MathGrpc.cs
+++ b/src/csharp/Grpc.Examples/MathGrpc.cs
@@ -41,14 +41,14 @@ namespace math {
         __Marshaller_Num,
         __Marshaller_Num);
 
-    // client-side stub interface
+    // client interface
     public interface IMathClient
     {
-      global::math.DivReply Div(global::math.DivArgs request, CancellationToken token = default(CancellationToken));
-      Task<global::math.DivReply> DivAsync(global::math.DivArgs request, CancellationToken token = default(CancellationToken));
-      AsyncDuplexStreamingCall<global::math.DivArgs, global::math.DivReply> DivMany(CancellationToken token = default(CancellationToken));
-      AsyncServerStreamingCall<global::math.Num> Fib(global::math.FibArgs request, CancellationToken token = default(CancellationToken));
-      AsyncClientStreamingCall<global::math.Num, global::math.Num> Sum(CancellationToken token = default(CancellationToken));
+      global::math.DivReply Div(global::math.DivArgs request, Metadata headers = null, CancellationToken cancellationToken = default(CancellationToken));
+      Task<global::math.DivReply> DivAsync(global::math.DivArgs request, Metadata headers = null, CancellationToken cancellationToken = default(CancellationToken));
+      AsyncDuplexStreamingCall<global::math.DivArgs, global::math.DivReply> DivMany(Metadata headers = null, CancellationToken cancellationToken = default(CancellationToken));
+      AsyncServerStreamingCall<global::math.Num> Fib(global::math.FibArgs request, Metadata headers = null, CancellationToken cancellationToken = default(CancellationToken));
+      AsyncClientStreamingCall<global::math.Num, global::math.Num> Sum(Metadata headers = null, CancellationToken cancellationToken = default(CancellationToken));
     }
 
     // server-side interface
@@ -61,38 +61,35 @@ namespace math {
     }
 
     // client stub
-    public class MathClient : AbstractStub<MathClient, StubConfiguration>, IMathClient
+    public class MathClient : ClientBase, IMathClient
     {
-      public MathClient(Channel channel) : this(channel, StubConfiguration.Default)
+      public MathClient(Channel channel) : base(channel)
       {
       }
-      public MathClient(Channel channel, StubConfiguration config) : base(channel, config)
+      public global::math.DivReply Div(global::math.DivArgs request, Metadata headers = null, CancellationToken cancellationToken = default(CancellationToken))
       {
+        var call = CreateCall(__ServiceName, __Method_Div, headers);
+        return Calls.BlockingUnaryCall(call, request, cancellationToken);
       }
-      public global::math.DivReply Div(global::math.DivArgs request, CancellationToken token = default(CancellationToken))
+      public Task<global::math.DivReply> DivAsync(global::math.DivArgs request, Metadata headers = null, CancellationToken cancellationToken = default(CancellationToken))
       {
-        var call = CreateCall(__ServiceName, __Method_Div);
-        return Calls.BlockingUnaryCall(call, request, token);
+        var call = CreateCall(__ServiceName, __Method_Div, headers);
+        return Calls.AsyncUnaryCall(call, request, cancellationToken);
       }
-      public Task<global::math.DivReply> DivAsync(global::math.DivArgs request, CancellationToken token = default(CancellationToken))
+      public AsyncDuplexStreamingCall<global::math.DivArgs, global::math.DivReply> DivMany(Metadata headers = null, CancellationToken cancellationToken = default(CancellationToken))
       {
-        var call = CreateCall(__ServiceName, __Method_Div);
-        return Calls.AsyncUnaryCall(call, request, token);
+        var call = CreateCall(__ServiceName, __Method_DivMany, headers);
+        return Calls.AsyncDuplexStreamingCall(call, cancellationToken);
       }
-      public AsyncDuplexStreamingCall<global::math.DivArgs, global::math.DivReply> DivMany(CancellationToken token = default(CancellationToken))
+      public AsyncServerStreamingCall<global::math.Num> Fib(global::math.FibArgs request, Metadata headers = null, CancellationToken cancellationToken = default(CancellationToken))
       {
-        var call = CreateCall(__ServiceName, __Method_DivMany);
-        return Calls.AsyncDuplexStreamingCall(call, token);
+        var call = CreateCall(__ServiceName, __Method_Fib, headers);
+        return Calls.AsyncServerStreamingCall(call, request, cancellationToken);
       }
-      public AsyncServerStreamingCall<global::math.Num> Fib(global::math.FibArgs request, CancellationToken token = default(CancellationToken))
+      public AsyncClientStreamingCall<global::math.Num, global::math.Num> Sum(Metadata headers = null, CancellationToken cancellationToken = default(CancellationToken))
       {
-        var call = CreateCall(__ServiceName, __Method_Fib);
-        return Calls.AsyncServerStreamingCall(call, request, token);
-      }
-      public AsyncClientStreamingCall<global::math.Num, global::math.Num> Sum(CancellationToken token = default(CancellationToken))
-      {
-        var call = CreateCall(__ServiceName, __Method_Sum);
-        return Calls.AsyncClientStreamingCall(call, token);
+        var call = CreateCall(__ServiceName, __Method_Sum, headers);
+        return Calls.AsyncClientStreamingCall(call, cancellationToken);
       }
     }
 
@@ -106,17 +103,12 @@ namespace math {
           .AddMethod(__Method_Sum, serviceImpl.Sum).Build();
     }
 
-    // creates a new client stub
-    public static IMathClient NewStub(Channel channel)
+    // creates a new client
+    public static MathClient NewClient(Channel channel)
     {
       return new MathClient(channel);
     }
 
-    // creates a new client stub
-    public static IMathClient NewStub(Channel channel, StubConfiguration config)
-    {
-      return new MathClient(channel, config);
-    }
   }
 }
 #endregion
diff --git a/src/csharp/Grpc.HealthCheck.Tests/HealthClientServerTest.cs b/src/csharp/Grpc.HealthCheck.Tests/HealthClientServerTest.cs
index 0ac1add8e42..73ff0e74b57 100644
--- a/src/csharp/Grpc.HealthCheck.Tests/HealthClientServerTest.cs
+++ b/src/csharp/Grpc.HealthCheck.Tests/HealthClientServerTest.cs
@@ -63,7 +63,7 @@ namespace Grpc.HealthCheck.Tests
             server.Start();
             channel = new Channel(Host, port);
 
-            client = Grpc.Health.V1Alpha.Health.NewStub(channel);
+            client = Grpc.Health.V1Alpha.Health.NewClient(channel);
         }
 
         [TestFixtureTearDown]
diff --git a/src/csharp/Grpc.HealthCheck/HealthGrpc.cs b/src/csharp/Grpc.HealthCheck/HealthGrpc.cs
index ed9fc4ed774..3aebdcb5573 100644
--- a/src/csharp/Grpc.HealthCheck/HealthGrpc.cs
+++ b/src/csharp/Grpc.HealthCheck/HealthGrpc.cs
@@ -21,11 +21,11 @@ namespace Grpc.Health.V1Alpha {
         __Marshaller_HealthCheckRequest,
         __Marshaller_HealthCheckResponse);
 
-    // client-side stub interface
+    // client interface
     public interface IHealthClient
     {
-      global::Grpc.Health.V1Alpha.HealthCheckResponse Check(global::Grpc.Health.V1Alpha.HealthCheckRequest request, CancellationToken token = default(CancellationToken));
-      Task<global::Grpc.Health.V1Alpha.HealthCheckResponse> CheckAsync(global::Grpc.Health.V1Alpha.HealthCheckRequest request, CancellationToken token = default(CancellationToken));
+      global::Grpc.Health.V1Alpha.HealthCheckResponse Check(global::Grpc.Health.V1Alpha.HealthCheckRequest request, Metadata headers = null, CancellationToken cancellationToken = default(CancellationToken));
+      Task<global::Grpc.Health.V1Alpha.HealthCheckResponse> CheckAsync(global::Grpc.Health.V1Alpha.HealthCheckRequest request, Metadata headers = null, CancellationToken cancellationToken = default(CancellationToken));
     }
 
     // server-side interface
@@ -35,23 +35,20 @@ namespace Grpc.Health.V1Alpha {
     }
 
     // client stub
-    public class HealthClient : AbstractStub<HealthClient, StubConfiguration>, IHealthClient
+    public class HealthClient : ClientBase, IHealthClient
     {
-      public HealthClient(Channel channel) : this(channel, StubConfiguration.Default)
+      public HealthClient(Channel channel) : base(channel)
       {
       }
-      public HealthClient(Channel channel, StubConfiguration config) : base(channel, config)
+      public global::Grpc.Health.V1Alpha.HealthCheckResponse Check(global::Grpc.Health.V1Alpha.HealthCheckRequest request, Metadata headers = null, CancellationToken cancellationToken = default(CancellationToken))
       {
+        var call = CreateCall(__ServiceName, __Method_Check, headers);
+        return Calls.BlockingUnaryCall(call, request, cancellationToken);
       }
-      public global::Grpc.Health.V1Alpha.HealthCheckResponse Check(global::Grpc.Health.V1Alpha.HealthCheckRequest request, CancellationToken token = default(CancellationToken))
+      public Task<global::Grpc.Health.V1Alpha.HealthCheckResponse> CheckAsync(global::Grpc.Health.V1Alpha.HealthCheckRequest request, Metadata headers = null, CancellationToken cancellationToken = default(CancellationToken))
       {
-        var call = CreateCall(__ServiceName, __Method_Check);
-        return Calls.BlockingUnaryCall(call, request, token);
-      }
-      public Task<global::Grpc.Health.V1Alpha.HealthCheckResponse> CheckAsync(global::Grpc.Health.V1Alpha.HealthCheckRequest request, CancellationToken token = default(CancellationToken))
-      {
-        var call = CreateCall(__ServiceName, __Method_Check);
-        return Calls.AsyncUnaryCall(call, request, token);
+        var call = CreateCall(__ServiceName, __Method_Check, headers);
+        return Calls.AsyncUnaryCall(call, request, cancellationToken);
       }
     }
 
@@ -62,17 +59,12 @@ namespace Grpc.Health.V1Alpha {
           .AddMethod(__Method_Check, serviceImpl.Check).Build();
     }
 
-    // creates a new client stub
-    public static IHealthClient NewStub(Channel channel)
+    // creates a new client
+    public static HealthClient NewClient(Channel channel)
     {
       return new HealthClient(channel);
     }
 
-    // creates a new client stub
-    public static IHealthClient NewStub(Channel channel, StubConfiguration config)
-    {
-      return new HealthClient(channel, config);
-    }
   }
 }
 #endregion
diff --git a/src/csharp/Grpc.IntegrationTesting/InteropClient.cs b/src/csharp/Grpc.IntegrationTesting/InteropClient.cs
index bdcb2c505c2..05e732dbd46 100644
--- a/src/csharp/Grpc.IntegrationTesting/InteropClient.cs
+++ b/src/csharp/Grpc.IntegrationTesting/InteropClient.cs
@@ -119,7 +119,7 @@ namespace Grpc.IntegrationTesting
 
             using (Channel channel = new Channel(options.serverHost, options.serverPort.Value, credentials, channelOptions))
             {
-                var stubConfig = StubConfiguration.Default;
+                TestService.TestServiceClient client = new TestService.TestServiceClient(channel);
                 if (options.testCase == "service_account_creds" || options.testCase == "compute_engine_creds")
                 {
                     var credential = GoogleCredential.GetApplicationDefault();
@@ -127,10 +127,9 @@ namespace Grpc.IntegrationTesting
                     {
                         credential = credential.CreateScoped(new[] { AuthScope });
                     }
-                    stubConfig = new StubConfiguration(OAuth2InterceptorFactory.Create(credential));
+                    client.HeaderInterceptor = OAuth2InterceptorFactory.Create(credential);
                 }
 
-                TestService.ITestServiceClient client = new TestService.TestServiceClient(channel, stubConfig);
                 RunTestCase(options.testCase, client);
             }
             GrpcEnvironment.Shutdown();
@@ -363,7 +362,7 @@ namespace Grpc.IntegrationTesting
                 Console.WriteLine("running cancel_after_begin");
 
                 var cts = new CancellationTokenSource();
-                using (var call = client.StreamingInputCall(cts.Token))
+                using (var call = client.StreamingInputCall(cancellationToken: cts.Token))
                 {
                     // TODO(jtattermusch): we need this to ensure call has been initiated once we cancel it.
                     await Task.Delay(1000);
@@ -390,7 +389,7 @@ namespace Grpc.IntegrationTesting
                 Console.WriteLine("running cancel_after_first_response");
 
                 var cts = new CancellationTokenSource();
-                using (var call = client.FullDuplexCall(cts.Token))
+                using (var call = client.FullDuplexCall(cancellationToken: cts.Token))
                 {
                     await call.RequestStream.WriteAsync(StreamingOutputCallRequest.CreateBuilder()
                         .SetResponseType(PayloadType.COMPRESSABLE)
diff --git a/src/csharp/Grpc.IntegrationTesting/InteropClientServerTest.cs b/src/csharp/Grpc.IntegrationTesting/InteropClientServerTest.cs
index 6c2da9d2ee6..f306289cfb5 100644
--- a/src/csharp/Grpc.IntegrationTesting/InteropClientServerTest.cs
+++ b/src/csharp/Grpc.IntegrationTesting/InteropClientServerTest.cs
@@ -65,7 +65,7 @@ namespace Grpc.IntegrationTesting
                 new ChannelOption(ChannelOptions.SslTargetNameOverride, TestCredentials.DefaultHostOverride)
             };
             channel = new Channel(host, port, TestCredentials.CreateTestClientCredentials(true), options);
-            client = TestService.NewStub(channel);
+            client = TestService.NewClient(channel);
         }
 
         [TestFixtureTearDown]
diff --git a/src/csharp/Grpc.IntegrationTesting/TestGrpc.cs b/src/csharp/Grpc.IntegrationTesting/TestGrpc.cs
index ee077f9f56f..96d9b237177 100644
--- a/src/csharp/Grpc.IntegrationTesting/TestGrpc.cs
+++ b/src/csharp/Grpc.IntegrationTesting/TestGrpc.cs
@@ -56,17 +56,17 @@ namespace grpc.testing {
         __Marshaller_StreamingOutputCallRequest,
         __Marshaller_StreamingOutputCallResponse);
 
-    // client-side stub interface
+    // client interface
     public interface ITestServiceClient
     {
-      global::grpc.testing.Empty EmptyCall(global::grpc.testing.Empty request, CancellationToken token = default(CancellationToken));
-      Task<global::grpc.testing.Empty> EmptyCallAsync(global::grpc.testing.Empty request, CancellationToken token = default(CancellationToken));
-      global::grpc.testing.SimpleResponse UnaryCall(global::grpc.testing.SimpleRequest request, CancellationToken token = default(CancellationToken));
-      Task<global::grpc.testing.SimpleResponse> UnaryCallAsync(global::grpc.testing.SimpleRequest request, CancellationToken token = default(CancellationToken));
-      AsyncServerStreamingCall<global::grpc.testing.StreamingOutputCallResponse> StreamingOutputCall(global::grpc.testing.StreamingOutputCallRequest request, CancellationToken token = default(CancellationToken));
-      AsyncClientStreamingCall<global::grpc.testing.StreamingInputCallRequest, global::grpc.testing.StreamingInputCallResponse> StreamingInputCall(CancellationToken token = default(CancellationToken));
-      AsyncDuplexStreamingCall<global::grpc.testing.StreamingOutputCallRequest, global::grpc.testing.StreamingOutputCallResponse> FullDuplexCall(CancellationToken token = default(CancellationToken));
-      AsyncDuplexStreamingCall<global::grpc.testing.StreamingOutputCallRequest, global::grpc.testing.StreamingOutputCallResponse> HalfDuplexCall(CancellationToken token = default(CancellationToken));
+      global::grpc.testing.Empty EmptyCall(global::grpc.testing.Empty request, Metadata headers = null, CancellationToken cancellationToken = default(CancellationToken));
+      Task<global::grpc.testing.Empty> EmptyCallAsync(global::grpc.testing.Empty request, Metadata headers = null, CancellationToken cancellationToken = default(CancellationToken));
+      global::grpc.testing.SimpleResponse UnaryCall(global::grpc.testing.SimpleRequest request, Metadata headers = null, CancellationToken cancellationToken = default(CancellationToken));
+      Task<global::grpc.testing.SimpleResponse> UnaryCallAsync(global::grpc.testing.SimpleRequest request, Metadata headers = null, CancellationToken cancellationToken = default(CancellationToken));
+      AsyncServerStreamingCall<global::grpc.testing.StreamingOutputCallResponse> StreamingOutputCall(global::grpc.testing.StreamingOutputCallRequest request, Metadata headers = null, CancellationToken cancellationToken = default(CancellationToken));
+      AsyncClientStreamingCall<global::grpc.testing.StreamingInputCallRequest, global::grpc.testing.StreamingInputCallResponse> StreamingInputCall(Metadata headers = null, CancellationToken cancellationToken = default(CancellationToken));
+      AsyncDuplexStreamingCall<global::grpc.testing.StreamingOutputCallRequest, global::grpc.testing.StreamingOutputCallResponse> FullDuplexCall(Metadata headers = null, CancellationToken cancellationToken = default(CancellationToken));
+      AsyncDuplexStreamingCall<global::grpc.testing.StreamingOutputCallRequest, global::grpc.testing.StreamingOutputCallResponse> HalfDuplexCall(Metadata headers = null, CancellationToken cancellationToken = default(CancellationToken));
     }
 
     // server-side interface
@@ -81,53 +81,50 @@ namespace grpc.testing {
     }
 
     // client stub
-    public class TestServiceClient : AbstractStub<TestServiceClient, StubConfiguration>, ITestServiceClient
+    public class TestServiceClient : ClientBase, ITestServiceClient
     {
-      public TestServiceClient(Channel channel) : this(channel, StubConfiguration.Default)
+      public TestServiceClient(Channel channel) : base(channel)
       {
       }
-      public TestServiceClient(Channel channel, StubConfiguration config) : base(channel, config)
+      public global::grpc.testing.Empty EmptyCall(global::grpc.testing.Empty request, Metadata headers = null, CancellationToken cancellationToken = default(CancellationToken))
       {
+        var call = CreateCall(__ServiceName, __Method_EmptyCall, headers);
+        return Calls.BlockingUnaryCall(call, request, cancellationToken);
       }
-      public global::grpc.testing.Empty EmptyCall(global::grpc.testing.Empty request, CancellationToken token = default(CancellationToken))
+      public Task<global::grpc.testing.Empty> EmptyCallAsync(global::grpc.testing.Empty request, Metadata headers = null, CancellationToken cancellationToken = default(CancellationToken))
       {
-        var call = CreateCall(__ServiceName, __Method_EmptyCall);
-        return Calls.BlockingUnaryCall(call, request, token);
+        var call = CreateCall(__ServiceName, __Method_EmptyCall, headers);
+        return Calls.AsyncUnaryCall(call, request, cancellationToken);
       }
-      public Task<global::grpc.testing.Empty> EmptyCallAsync(global::grpc.testing.Empty request, CancellationToken token = default(CancellationToken))
+      public global::grpc.testing.SimpleResponse UnaryCall(global::grpc.testing.SimpleRequest request, Metadata headers = null, CancellationToken cancellationToken = default(CancellationToken))
       {
-        var call = CreateCall(__ServiceName, __Method_EmptyCall);
-        return Calls.AsyncUnaryCall(call, request, token);
+        var call = CreateCall(__ServiceName, __Method_UnaryCall, headers);
+        return Calls.BlockingUnaryCall(call, request, cancellationToken);
       }
-      public global::grpc.testing.SimpleResponse UnaryCall(global::grpc.testing.SimpleRequest request, CancellationToken token = default(CancellationToken))
+      public Task<global::grpc.testing.SimpleResponse> UnaryCallAsync(global::grpc.testing.SimpleRequest request, Metadata headers = null, CancellationToken cancellationToken = default(CancellationToken))
       {
-        var call = CreateCall(__ServiceName, __Method_UnaryCall);
-        return Calls.BlockingUnaryCall(call, request, token);
+        var call = CreateCall(__ServiceName, __Method_UnaryCall, headers);
+        return Calls.AsyncUnaryCall(call, request, cancellationToken);
       }
-      public Task<global::grpc.testing.SimpleResponse> UnaryCallAsync(global::grpc.testing.SimpleRequest request, CancellationToken token = default(CancellationToken))
+      public AsyncServerStreamingCall<global::grpc.testing.StreamingOutputCallResponse> StreamingOutputCall(global::grpc.testing.StreamingOutputCallRequest request, Metadata headers = null, CancellationToken cancellationToken = default(CancellationToken))
       {
-        var call = CreateCall(__ServiceName, __Method_UnaryCall);
-        return Calls.AsyncUnaryCall(call, request, token);
+        var call = CreateCall(__ServiceName, __Method_StreamingOutputCall, headers);
+        return Calls.AsyncServerStreamingCall(call, request, cancellationToken);
       }
-      public AsyncServerStreamingCall<global::grpc.testing.StreamingOutputCallResponse> StreamingOutputCall(global::grpc.testing.StreamingOutputCallRequest request, CancellationToken token = default(CancellationToken))
+      public AsyncClientStreamingCall<global::grpc.testing.StreamingInputCallRequest, global::grpc.testing.StreamingInputCallResponse> StreamingInputCall(Metadata headers = null, CancellationToken cancellationToken = default(CancellationToken))
       {
-        var call = CreateCall(__ServiceName, __Method_StreamingOutputCall);
-        return Calls.AsyncServerStreamingCall(call, request, token);
+        var call = CreateCall(__ServiceName, __Method_StreamingInputCall, headers);
+        return Calls.AsyncClientStreamingCall(call, cancellationToken);
       }
-      public AsyncClientStreamingCall<global::grpc.testing.StreamingInputCallRequest, global::grpc.testing.StreamingInputCallResponse> StreamingInputCall(CancellationToken token = default(CancellationToken))
+      public AsyncDuplexStreamingCall<global::grpc.testing.StreamingOutputCallRequest, global::grpc.testing.StreamingOutputCallResponse> FullDuplexCall(Metadata headers = null, CancellationToken cancellationToken = default(CancellationToken))
       {
-        var call = CreateCall(__ServiceName, __Method_StreamingInputCall);
-        return Calls.AsyncClientStreamingCall(call, token);
+        var call = CreateCall(__ServiceName, __Method_FullDuplexCall, headers);
+        return Calls.AsyncDuplexStreamingCall(call, cancellationToken);
       }
-      public AsyncDuplexStreamingCall<global::grpc.testing.StreamingOutputCallRequest, global::grpc.testing.StreamingOutputCallResponse> FullDuplexCall(CancellationToken token = default(CancellationToken))
+      public AsyncDuplexStreamingCall<global::grpc.testing.StreamingOutputCallRequest, global::grpc.testing.StreamingOutputCallResponse> HalfDuplexCall(Metadata headers = null, CancellationToken cancellationToken = default(CancellationToken))
       {
-        var call = CreateCall(__ServiceName, __Method_FullDuplexCall);
-        return Calls.AsyncDuplexStreamingCall(call, token);
-      }
-      public AsyncDuplexStreamingCall<global::grpc.testing.StreamingOutputCallRequest, global::grpc.testing.StreamingOutputCallResponse> HalfDuplexCall(CancellationToken token = default(CancellationToken))
-      {
-        var call = CreateCall(__ServiceName, __Method_HalfDuplexCall);
-        return Calls.AsyncDuplexStreamingCall(call, token);
+        var call = CreateCall(__ServiceName, __Method_HalfDuplexCall, headers);
+        return Calls.AsyncDuplexStreamingCall(call, cancellationToken);
       }
     }
 
@@ -143,17 +140,12 @@ namespace grpc.testing {
           .AddMethod(__Method_HalfDuplexCall, serviceImpl.HalfDuplexCall).Build();
     }
 
-    // creates a new client stub
-    public static ITestServiceClient NewStub(Channel channel)
+    // creates a new client
+    public static TestServiceClient NewClient(Channel channel)
     {
       return new TestServiceClient(channel);
     }
 
-    // creates a new client stub
-    public static ITestServiceClient NewStub(Channel channel, StubConfiguration config)
-    {
-      return new TestServiceClient(channel, config);
-    }
   }
 }
 #endregion
diff --git a/src/csharp/generate_proto_csharp.sh b/src/csharp/generate_proto_csharp.sh
index 6eb3887ea10..7c3ba709220 100755
--- a/src/csharp/generate_proto_csharp.sh
+++ b/src/csharp/generate_proto_csharp.sh
@@ -32,16 +32,17 @@
 set +e
 cd $(dirname $0)
 
+PROTOC=../../bins/opt/protobuf/protoc
 PLUGIN=protoc-gen-grpc=../../bins/opt/grpc_csharp_plugin
 EXAMPLES_DIR=Grpc.Examples
 INTEROP_DIR=Grpc.IntegrationTesting
 HEALTHCHECK_DIR=Grpc.HealthCheck
 
-protoc --plugin=$PLUGIN --grpc_out=$EXAMPLES_DIR \
+$PROTOC --plugin=$PLUGIN --grpc_out=$EXAMPLES_DIR \
     -I $EXAMPLES_DIR/proto $EXAMPLES_DIR/proto/math.proto
 
-protoc --plugin=$PLUGIN --grpc_out=$INTEROP_DIR \
+$PROTOC --plugin=$PLUGIN --grpc_out=$INTEROP_DIR \
     -I $INTEROP_DIR/proto $INTEROP_DIR/proto/test.proto
-	
-protoc --plugin=$PLUGIN --grpc_out=$HEALTHCHECK_DIR \
+
+$PROTOC --plugin=$PLUGIN --grpc_out=$HEALTHCHECK_DIR \
     -I $HEALTHCHECK_DIR/proto $HEALTHCHECK_DIR/proto/health.proto
diff --git a/src/objective-c/tests/GRPCClientTests.m b/src/objective-c/tests/GRPCClientTests.m
index f9c2d5d8d6e..2e03ad88a82 100644
--- a/src/objective-c/tests/GRPCClientTests.m
+++ b/src/objective-c/tests/GRPCClientTests.m
@@ -87,7 +87,7 @@ static ProtoMethod *kUnaryCallMethod;
 
   [call startWithWriteable:responsesWriteable];
 
-  [self waitForExpectationsWithTimeout:2. handler:nil];
+  [self waitForExpectationsWithTimeout:4 handler:nil];
 }
 
 - (void)testEmptyRPC {
@@ -109,7 +109,7 @@ static ProtoMethod *kUnaryCallMethod;
 
   [call startWithWriteable:responsesWriteable];
 
-  [self waitForExpectationsWithTimeout:2. handler:nil];
+  [self waitForExpectationsWithTimeout:4 handler:nil];
 }
 
 - (void)testSimpleProtoRPC {
@@ -141,7 +141,7 @@ static ProtoMethod *kUnaryCallMethod;
 
   [call startWithWriteable:responsesWriteable];
 
-  [self waitForExpectationsWithTimeout:2. handler:nil];
+  [self waitForExpectationsWithTimeout:4 handler:nil];
 }
 
 - (void)testMetadata {
@@ -173,7 +173,7 @@ static ProtoMethod *kUnaryCallMethod;
 
   [call startWithWriteable:responsesWriteable];
 
-  [self waitForExpectationsWithTimeout:2. handler:nil];
+  [self waitForExpectationsWithTimeout:4 handler:nil];
 }
 
 @end
diff --git a/src/objective-c/tests/InteropTests.m b/src/objective-c/tests/InteropTests.m
index 74f6b231cfd..38fc65839c5 100644
--- a/src/objective-c/tests/InteropTests.m
+++ b/src/objective-c/tests/InteropTests.m
@@ -103,7 +103,7 @@
     [expectation fulfill];
   }];
 
-  [self waitForExpectationsWithTimeout:2 handler:nil];
+  [self waitForExpectationsWithTimeout:4 handler:nil];
 }
 
 - (void)testLargeUnaryRPC {
@@ -125,7 +125,7 @@
     [expectation fulfill];
   }];
 
-  [self waitForExpectationsWithTimeout:4 handler:nil];
+  [self waitForExpectationsWithTimeout:8 handler:nil];
 }
 
 - (void)testClientStreamingRPC {
@@ -157,7 +157,7 @@
     [expectation fulfill];
   }];
 
-  [self waitForExpectationsWithTimeout:4 handler:nil];
+  [self waitForExpectationsWithTimeout:8 handler:nil];
 }
 
 - (void)testServerStreamingRPC {
@@ -193,7 +193,7 @@
     }
   }];
 
-  [self waitForExpectationsWithTimeout:4 handler:nil];
+  [self waitForExpectationsWithTimeout:8 handler:nil];
 }
 
 - (void)testPingPongRPC {
@@ -236,7 +236,7 @@
       [expectation fulfill];
     }
   }];
-  [self waitForExpectationsWithTimeout:2 handler:nil];
+  [self waitForExpectationsWithTimeout:4 handler:nil];
 }
 
 - (void)testEmptyStreamRPC {
@@ -282,10 +282,11 @@
   
   [requestsBuffer writeValue:request];
   
-  __block ProtoRPC *call = [_service RPCToFullDuplexCallWithRequestsWriter:requestsBuffer
-                                                              eventHandler:^(BOOL done,
-                                                                             RMTStreamingOutputCallResponse *response,
-                                                                             NSError *error) {
+  __block ProtoRPC *call =
+      [_service RPCToFullDuplexCallWithRequestsWriter:requestsBuffer
+                                         eventHandler:^(BOOL done,
+                                                        RMTStreamingOutputCallResponse *response,
+                                                        NSError *error) {
     if (receivedResponse) {
       XCTAssert(done, @"Unexpected extra response %@", response);
       XCTAssertEqual(error.code, GRPC_STATUS_CANCELLED);
@@ -299,7 +300,7 @@
     }
   }];
   [call start];
-  [self waitForExpectationsWithTimeout:4 handler:nil];
+  [self waitForExpectationsWithTimeout:8 handler:nil];
 }
 
 @end
diff --git a/src/php/bin/determine_extension_dir.sh b/src/php/bin/determine_extension_dir.sh
index 3c1fc297fa7..b4342ac89fa 100755
--- a/src/php/bin/determine_extension_dir.sh
+++ b/src/php/bin/determine_extension_dir.sh
@@ -46,4 +46,6 @@ elif [ ! -e $default_extension_dir/grpc.so ]; then
     ln -s $f $module_dir/$(basename $f) &> /dev/null || true
   done
   extension_dir="-d extension_dir=${module_dir} -d extension=grpc.so"
+else
+  extension_dir="-d extension=grpc.so"
 fi
diff --git a/templates/Makefile.template b/templates/Makefile.template
index 490c002f9a9..044db4dbfee 100644
--- a/templates/Makefile.template
+++ b/templates/Makefile.template
@@ -353,20 +353,20 @@ CACHE_MK =
 HAS_PKG_CONFIG ?= $(shell command -v $(PKG_CONFIG) >/dev/null 2>&1 && echo true || echo false)
 
 ifeq ($(HAS_PKG_CONFIG), true)
-CACHE_MK += HAS_PKG_CONFIG = true\n
-endif
-
-PC_TEMPLATE = prefix=$(prefix)\n\
-exec_prefix=${'\$${prefix}'}\n\
-includedir=${'\$${prefix}'}/include\n\
-libdir=${'\$${exec_prefix}'}/lib\n\
-\n\
-Name: $(PC_NAME)\n\
-Description: $(PC_DESCRIPTION)\n\
-Version: $(VERSION)\n\
-Cflags: -I${'\$${includedir}'} $(PC_CFLAGS)\n\
-Requires.private: $(PC_REQUIRES_PRIVATE)\n\
-Libs: -L${'\$${libdir}'} $(PC_LIB)\n\
+CACHE_MK += HAS_PKG_CONFIG = true,
+endif
+
+PC_TEMPLATE = prefix=$(prefix),\
+exec_prefix=${'\$${prefix}'},\
+includedir=${'\$${prefix}'}/include,\
+libdir=${'\$${exec_prefix}'}/lib,\
+,\
+Name: $(PC_NAME),\
+Description: $(PC_DESCRIPTION),\
+Version: $(VERSION),\
+Cflags: -I${'\$${includedir}'} $(PC_CFLAGS),\
+Requires.private: $(PC_REQUIRES_PRIVATE),\
+Libs: -L${'\$${libdir}'} $(PC_LIB),\
 Libs.private: $(PC_LIBS_PRIVATE)
 
 # gpr .pc file
@@ -442,7 +442,7 @@ HAS_SYSTEM_PERFTOOLS ?= $(shell $(PERFTOOLS_CHECK_CMD) 2> /dev/null && echo true
 ifeq ($(HAS_SYSTEM_PERFTOOLS),true)
 DEFINES += GRPC_HAVE_PERFTOOLS
 LIBS += profiler
-CACHE_MK += HAS_SYSTEM_PERFTOOLS = true\n
+CACHE_MK += HAS_SYSTEM_PERFTOOLS = true,
 endif
 endif
 
@@ -451,20 +451,20 @@ ifndef REQUIRE_CUSTOM_LIBRARIES_$(CONFIG)
 HAS_SYSTEM_OPENSSL_ALPN ?= $(shell $(OPENSSL_ALPN_CHECK_CMD) 2> /dev/null && echo true || echo false)
 ifeq ($(HAS_SYSTEM_OPENSSL_ALPN),true)
 HAS_SYSTEM_OPENSSL_NPN = true
-CACHE_MK += HAS_SYSTEM_OPENSSL_ALPN = true\n
+CACHE_MK += HAS_SYSTEM_OPENSSL_ALPN = true,
 else
 HAS_SYSTEM_OPENSSL_NPN ?= $(shell $(OPENSSL_NPN_CHECK_CMD) 2> /dev/null && echo true || echo false)
 endif
 ifeq ($(HAS_SYSTEM_OPENSSL_NPN),true)
-CACHE_MK += HAS_SYSTEM_OPENSSL_NPN = true\n
+CACHE_MK += HAS_SYSTEM_OPENSSL_NPN = true,
 endif
 HAS_SYSTEM_ZLIB ?= $(shell $(ZLIB_CHECK_CMD) 2> /dev/null && echo true || echo false)
 ifeq ($(HAS_SYSTEM_ZLIB),true)
-CACHE_MK += HAS_SYSTEM_ZLIB = true\n
+CACHE_MK += HAS_SYSTEM_ZLIB = true,
 endif
 HAS_SYSTEM_PROTOBUF ?= $(HAS_SYSTEM_PROTOBUF_VERIFY)
 ifeq ($(HAS_SYSTEM_PROTOBUF),true)
-CACHE_MK += HAS_SYSTEM_PROTOBUF = true\n
+CACHE_MK += HAS_SYSTEM_PROTOBUF = true,
 endif
 else
 # override system libraries if the config requires a custom compiled library
@@ -476,10 +476,10 @@ endif
 
 HAS_PROTOC ?= $(shell $(PROTOC_CHECK_CMD) 2> /dev/null && echo true || echo false)
 ifeq ($(HAS_PROTOC),true)
-CACHE_MK += HAS_PROTOC = true\n
+CACHE_MK += HAS_PROTOC = true,
 HAS_VALID_PROTOC ?= $(shell $(PROTOC_CHECK_VERSION_CMD) 2> /dev/null && echo true || echo false)
 ifeq ($(HAS_VALID_PROTOC),true)
-CACHE_MK += HAS_VALID_PROTOC = true\n
+CACHE_MK += HAS_VALID_PROTOC = true,
 endif
 else
 HAS_VALID_PROTOC = false
@@ -500,7 +500,7 @@ endif
 endif
 
 ifeq ($(HAS_SYSTEMTAP),true)
-CACHE_MK += HAS_SYSTEMTAP = true\n
+CACHE_MK += HAS_SYSTEMTAP = true,
 endif
 
 # Note that for testing purposes, one can do:
@@ -1108,32 +1108,32 @@ endif
 
 cache.mk::
 	$(E) "[MAKE]    Generating $@"
-	$(Q) echo -e "$(CACHE_MK)" >$@
+	$(Q) echo "$(CACHE_MK)" | tr , '\n' >$@
 
 $(LIBDIR)/$(CONFIG)/pkgconfig/gpr.pc:
 	$(E) "[MAKE]    Generating $@"
 	$(Q) mkdir -p $(@D)
-	$(Q) echo -e "$(GPR_PC_FILE)" >$@
+	$(Q) echo "$(GPR_PC_FILE)" | tr , '\n' >$@
 
 $(LIBDIR)/$(CONFIG)/pkgconfig/grpc.pc:
 	$(E) "[MAKE]    Generating $@"
 	$(Q) mkdir -p $(@D)
-	$(Q) echo -e "$(GRPC_PC_FILE)" >$@
+	$(Q) echo "$(GRPC_PC_FILE)" | tr , '\n' >$@
 
 $(LIBDIR)/$(CONFIG)/pkgconfig/grpc_unsecure.pc:
 	$(E) "[MAKE]    Generating $@"
 	$(Q) mkdir -p $(@D)
-	$(Q) echo -e "$(GRPC_UNSECURE_PC_FILE)" >$@
+	$(Q) echo "$(GRPC_UNSECURE_PC_FILE)" | tr , '\n' >$@
 
 $(LIBDIR)/$(CONFIG)/pkgconfig/grpc++.pc:
 	$(E) "[MAKE]    Generating $@"
 	$(Q) mkdir -p $(@D)
-	$(Q) echo -e "$(GRPCXX_PC_FILE)" >$@
+	$(Q) echo "$(GRPCXX_PC_FILE)" | tr , '\n' >$@
 
 $(LIBDIR)/$(CONFIG)/pkgconfig/grpc++_unsecure.pc:
 	$(E) "[MAKE]    Generating $@"
 	$(Q) mkdir -p $(@D)
-	$(Q) echo -e "$(GRPCXX_UNSECURE_PC_FILE)" >$@
+	$(Q) echo "$(GRPCXX_UNSECURE_PC_FILE)" | tr , '\n' >$@
 
 % for p in protos:
 ifeq ($(NO_PROTOC),true)
diff --git a/test/core/client_config/uri_parser_test.c b/test/core/client_config/uri_parser_test.c
index e5f9017ce09..3451ca1e8cc 100644
--- a/test/core/client_config/uri_parser_test.c
+++ b/test/core/client_config/uri_parser_test.c
@@ -60,6 +60,7 @@ int main(int argc, char **argv) {
   test_succeeds("http://www.google.com:90", "http", "www.google.com:90", "");
   test_succeeds("a192.4-df:foo.coom", "a192.4-df", "", "foo.coom");
   test_succeeds("a+b:foo.coom", "a+b", "", "foo.coom");
+  test_succeeds("zookeeper://127.0.0.1:2181/foo/bar", "zookeeper", "127.0.0.1:2181", "/foo/bar");
   test_fails("xyz");
   test_fails("http://www.google.com?why-are-you-using-queries");
   test_fails("dns:foo.com#fragments-arent-supported-here");
diff --git a/test/cpp/end2end/client_crash_test.cc b/test/cpp/end2end/client_crash_test.cc
index 645226f3754..906f124c058 100644
--- a/test/cpp/end2end/client_crash_test.cc
+++ b/test/cpp/end2end/client_crash_test.cc
@@ -31,13 +31,10 @@
  *
  */
 
-#include <thread>
-
 #include "test/core/util/port.h"
 #include "test/core/util/test_config.h"
 #include "test/cpp/util/echo_duplicate.grpc.pb.h"
 #include "test/cpp/util/echo.grpc.pb.h"
-#include "src/cpp/server/thread_pool.h"
 #include <grpc++/channel_arguments.h>
 #include <grpc++/channel_interface.h>
 #include <grpc++/client_context.h>
diff --git a/test/cpp/end2end/end2end_test.cc b/test/cpp/end2end/end2end_test.cc
index 207dad52827..4b27cfea212 100644
--- a/test/cpp/end2end/end2end_test.cc
+++ b/test/cpp/end2end/end2end_test.cc
@@ -35,7 +35,6 @@
 #include <thread>
 
 #include "src/core/security/credentials.h"
-#include "src/cpp/server/thread_pool.h"
 #include "test/core/util/port.h"
 #include "test/core/util/test_config.h"
 #include "test/cpp/util/echo_duplicate.grpc.pb.h"
@@ -46,6 +45,7 @@
 #include <grpc++/client_context.h>
 #include <grpc++/create_channel.h>
 #include <grpc++/credentials.h>
+#include <grpc++/fixed_size_thread_pool.h>
 #include <grpc++/server.h>
 #include <grpc++/server_builder.h>
 #include <grpc++/server_context.h>
@@ -260,7 +260,7 @@ class End2endTest : public ::testing::Test {
   TestServiceImpl service_;
   TestServiceImpl special_service_;
   TestServiceImplDupPkg dup_pkg_service_;
-  ThreadPool thread_pool_;
+  FixedSizeThreadPool thread_pool_;
 };
 
 static void SendRpc(grpc::cpp::test::util::TestService::Stub* stub,
diff --git a/test/cpp/end2end/mock_test.cc b/test/cpp/end2end/mock_test.cc
index 59a8edf5092..74b40d54d82 100644
--- a/test/cpp/end2end/mock_test.cc
+++ b/test/cpp/end2end/mock_test.cc
@@ -37,12 +37,12 @@
 #include "test/core/util/test_config.h"
 #include "test/cpp/util/echo_duplicate.grpc.pb.h"
 #include "test/cpp/util/echo.grpc.pb.h"
-#include "src/cpp/server/thread_pool.h"
 #include <grpc++/channel_arguments.h>
 #include <grpc++/channel_interface.h>
 #include <grpc++/client_context.h>
 #include <grpc++/create_channel.h>
 #include <grpc++/credentials.h>
+#include <grpc++/fixed_size_thread_pool.h>
 #include <grpc++/server.h>
 #include <grpc++/server_builder.h>
 #include <grpc++/server_context.h>
@@ -260,7 +260,7 @@ class MockTest : public ::testing::Test {
   std::unique_ptr<Server> server_;
   std::ostringstream server_address_;
   TestServiceImpl service_;
-  ThreadPool thread_pool_;
+  FixedSizeThreadPool thread_pool_;
 };
 
 // Do one real rpc and one mocked one
diff --git a/test/cpp/end2end/server_crash_test.cc b/test/cpp/end2end/server_crash_test.cc
index 4d4d590bdd7..d71345055d7 100644
--- a/test/cpp/end2end/server_crash_test.cc
+++ b/test/cpp/end2end/server_crash_test.cc
@@ -31,13 +31,10 @@
  *
  */
 
-#include <thread>
-
 #include "test/core/util/port.h"
 #include "test/core/util/test_config.h"
 #include "test/cpp/util/echo_duplicate.grpc.pb.h"
 #include "test/cpp/util/echo.grpc.pb.h"
-#include "src/cpp/server/thread_pool.h"
 #include <grpc++/channel_arguments.h>
 #include <grpc++/channel_interface.h>
 #include <grpc++/client_context.h>
diff --git a/test/cpp/end2end/thread_stress_test.cc b/test/cpp/end2end/thread_stress_test.cc
index 0b4d9425666..58e8ba394db 100644
--- a/test/cpp/end2end/thread_stress_test.cc
+++ b/test/cpp/end2end/thread_stress_test.cc
@@ -38,12 +38,12 @@
 #include "test/core/util/test_config.h"
 #include "test/cpp/util/echo_duplicate.grpc.pb.h"
 #include "test/cpp/util/echo.grpc.pb.h"
-#include "src/cpp/server/thread_pool.h"
 #include <grpc++/channel_arguments.h>
 #include <grpc++/channel_interface.h>
 #include <grpc++/client_context.h>
 #include <grpc++/create_channel.h>
 #include <grpc++/credentials.h>
+#include <grpc++/fixed_size_thread_pool.h>
 #include <grpc++/server.h>
 #include <grpc++/server_builder.h>
 #include <grpc++/server_context.h>
@@ -206,7 +206,7 @@ class End2endTest : public ::testing::Test {
   const int kMaxMessageSize_;
   TestServiceImpl service_;
   TestServiceImplDupPkg dup_pkg_service_;
-  ThreadPool thread_pool_;
+  FixedSizeThreadPool thread_pool_;
 };
 
 static void SendRpc(grpc::cpp::test::util::TestService::Stub* stub,
diff --git a/test/cpp/qps/server_async.cc b/test/cpp/qps/server_async.cc
index f5251e961b9..be232046080 100644
--- a/test/cpp/qps/server_async.cc
+++ b/test/cpp/qps/server_async.cc
@@ -45,6 +45,7 @@
 #include <grpc/support/host_port.h>
 #include <grpc++/async_unary_call.h>
 #include <grpc++/config.h>
+#include <grpc++/fixed_size_thread_pool.h>
 #include <grpc++/server.h>
 #include <grpc++/server_builder.h>
 #include <grpc++/server_context.h>
@@ -52,7 +53,6 @@
 #include <grpc++/status.h>
 #include <grpc++/stream.h>
 #include <gtest/gtest.h>
-#include "src/cpp/server/thread_pool.h"
 #include "test/cpp/qps/qpstest.grpc.pb.h"
 #include "test/cpp/qps/server.h"
 
diff --git a/test/cpp/qps/server_sync.cc b/test/cpp/qps/server_sync.cc
index bc00de9cedb..d90ff2212bc 100644
--- a/test/cpp/qps/server_sync.cc
+++ b/test/cpp/qps/server_sync.cc
@@ -40,13 +40,13 @@
 #include <grpc/support/alloc.h>
 #include <grpc/support/host_port.h>
 #include <grpc++/config.h>
+#include <grpc++/fixed_size_thread_pool.h>
 #include <grpc++/server.h>
 #include <grpc++/server_builder.h>
 #include <grpc++/server_context.h>
 #include <grpc++/server_credentials.h>
 #include <grpc++/status.h>
 #include <grpc++/stream.h>
-#include "src/cpp/server/thread_pool.h"
 #include "test/cpp/qps/qpstest.grpc.pb.h"
 #include "test/cpp/qps/server.h"
 #include "test/cpp/qps/timer.h"
@@ -111,7 +111,7 @@ class SynchronousServer GRPC_FINAL : public grpc::testing::Server {
   }
 
   TestServiceImpl service_;
-  ThreadPool thread_pool_;
+  FixedSizeThreadPool thread_pool_;
   std::unique_ptr<grpc::Server> impl_;
 };
 
diff --git a/test/cpp/server/thread_pool_test.cc b/test/cpp/server/fixed_size_thread_pool_test.cc
similarity index 90%
rename from test/cpp/server/thread_pool_test.cc
rename to test/cpp/server/fixed_size_thread_pool_test.cc
index 824d7853160..d62f4e81323 100644
--- a/test/cpp/server/thread_pool_test.cc
+++ b/test/cpp/server/fixed_size_thread_pool_test.cc
@@ -35,17 +35,17 @@
 #include <functional>
 #include <mutex>
 
-#include "src/cpp/server/thread_pool.h"
+#include <grpc++/fixed_size_thread_pool.h>
 #include <gtest/gtest.h>
 
 namespace grpc {
 
-class ThreadPoolTest : public ::testing::Test {
+class FixedSizeThreadPoolTest : public ::testing::Test {
  public:
-  ThreadPoolTest() : thread_pool_(4) {}
+  FixedSizeThreadPoolTest() : thread_pool_(4) {}
 
  protected:
-  ThreadPool thread_pool_;
+  FixedSizeThreadPool thread_pool_;
 };
 
 void Callback(std::mutex* mu, std::condition_variable* cv, bool* done) {
@@ -54,7 +54,7 @@ void Callback(std::mutex* mu, std::condition_variable* cv, bool* done) {
   cv->notify_all();
 }
 
-TEST_F(ThreadPoolTest, ScheduleCallback) {
+TEST_F(FixedSizeThreadPoolTest, ScheduleCallback) {
   std::mutex mu;
   std::condition_variable cv;
   bool done = false;
diff --git a/test/cpp/util/cli_call_test.cc b/test/cpp/util/cli_call_test.cc
index 6cf86ea89bf..00bb821ae67 100644
--- a/test/cpp/util/cli_call_test.cc
+++ b/test/cpp/util/cli_call_test.cc
@@ -34,12 +34,12 @@
 #include "test/core/util/test_config.h"
 #include "test/cpp/util/cli_call.h"
 #include "test/cpp/util/echo.grpc.pb.h"
-#include "src/cpp/server/thread_pool.h"
 #include <grpc++/channel_arguments.h>
 #include <grpc++/channel_interface.h>
 #include <grpc++/client_context.h>
 #include <grpc++/create_channel.h>
 #include <grpc++/credentials.h>
+#include <grpc++/fixed_size_thread_pool.h>
 #include <grpc++/server.h>
 #include <grpc++/server_builder.h>
 #include <grpc++/server_context.h>
@@ -102,7 +102,7 @@ class CliCallTest : public ::testing::Test {
   std::unique_ptr<Server> server_;
   std::ostringstream server_address_;
   TestServiceImpl service_;
-  ThreadPool thread_pool_;
+  FixedSizeThreadPool thread_pool_;
 };
 
 // Send a rpc with a normal stub and then a CliCall. Verify they match.
diff --git a/tools/doxygen/Doxyfile.c++ b/tools/doxygen/Doxyfile.c++
index feb7ad8bb93..ca5198031d0 100644
--- a/tools/doxygen/Doxyfile.c++
+++ b/tools/doxygen/Doxyfile.c++
@@ -772,6 +772,7 @@ include/grpc++/config.h \
 include/grpc++/config_protobuf.h \
 include/grpc++/create_channel.h \
 include/grpc++/credentials.h \
+include/grpc++/fixed_size_thread_pool.h \
 include/grpc++/generic_stub.h \
 include/grpc++/impl/call.h \
 include/grpc++/impl/client_unary_call.h \
diff --git a/tools/doxygen/Doxyfile.c++.internal b/tools/doxygen/Doxyfile.c++.internal
index 67718d8976f..7943724a370 100644
--- a/tools/doxygen/Doxyfile.c++.internal
+++ b/tools/doxygen/Doxyfile.c++.internal
@@ -772,6 +772,7 @@ include/grpc++/config.h \
 include/grpc++/config_protobuf.h \
 include/grpc++/create_channel.h \
 include/grpc++/credentials.h \
+include/grpc++/fixed_size_thread_pool.h \
 include/grpc++/generic_stub.h \
 include/grpc++/impl/call.h \
 include/grpc++/impl/client_unary_call.h \
@@ -803,7 +804,6 @@ src/cpp/common/secure_auth_context.h \
 src/cpp/server/secure_server_credentials.h \
 src/cpp/client/channel.h \
 src/cpp/common/create_auth_context.h \
-src/cpp/server/thread_pool.h \
 src/cpp/client/secure_channel_arguments.cc \
 src/cpp/client/secure_credentials.cc \
 src/cpp/common/secure_auth_context.cc \
@@ -823,12 +823,12 @@ src/cpp/common/rpc_method.cc \
 src/cpp/proto/proto_utils.cc \
 src/cpp/server/async_generic_service.cc \
 src/cpp/server/create_default_thread_pool.cc \
+src/cpp/server/fixed_size_thread_pool.cc \
 src/cpp/server/insecure_server_credentials.cc \
 src/cpp/server/server.cc \
 src/cpp/server/server_builder.cc \
 src/cpp/server/server_context.cc \
 src/cpp/server/server_credentials.cc \
-src/cpp/server/thread_pool.cc \
 src/cpp/util/byte_buffer.cc \
 src/cpp/util/slice.cc \
 src/cpp/util/status.cc \
diff --git a/tools/jenkins/docker_run_jenkins.sh b/tools/jenkins/docker_run_jenkins.sh
index 90107169baa..eb6c9144c63 100755
--- a/tools/jenkins/docker_run_jenkins.sh
+++ b/tools/jenkins/docker_run_jenkins.sh
@@ -42,4 +42,4 @@ cd /var/local/git/grpc
 nvm use 0.12
 rvm use ruby-2.1
 tools/run_tests/prepare_travis.sh
-tools/run_tests/run_tests.py -t -c $config -l $language -x report.xml
+$arch tools/run_tests/run_tests.py -t -c $config -l $language -x report.xml
diff --git a/tools/jenkins/run_jenkins.sh b/tools/jenkins/run_jenkins.sh
index af49ea0bd03..8cb85cb12b3 100755
--- a/tools/jenkins/run_jenkins.sh
+++ b/tools/jenkins/run_jenkins.sh
@@ -31,12 +31,24 @@
 # This script is invoked by Jenkins and triggers a test run based on
 # env variable settings.
 #
+# Setting up rvm environment BEFORE we set -ex.
+[[ -s /etc/profile.d/rvm.sh ]] && . /etc/profile.d/rvm.sh
 # To prevent cygwin bash complaining about empty lines ending with \r
 # we set the igncr option. The option doesn't exist on Linux, so we fallback
 # to just 'set -ex' there.
 # NOTE: No empty lines should appear in this file before igncr is set!
 set -ex -o igncr || set -ex
 
+# Grabbing the machine's architecture
+arch=`uname -m`
+
+case $platform in
+  i386)
+    arch="i386"
+    platform="linux"
+    ;;
+esac
+
 if [ "$platform" == "linux" ]
 then
   echo "building $language on Linux"
@@ -61,6 +73,7 @@ then
   docker run \
     -e "config=$config" \
     -e "language=$language" \
+    -e "arch=$arch" \
     -i \
     -v "$git_root:/var/local/jenkins/grpc" \
     --cidfile=docker.cid \
diff --git a/tools/run_tests/sources_and_headers.json b/tools/run_tests/sources_and_headers.json
index 37b819a2440..a21fa34024e 100644
--- a/tools/run_tests/sources_and_headers.json
+++ b/tools/run_tests/sources_and_headers.json
@@ -1198,6 +1198,21 @@
       "test/cpp/end2end/end2end_test.cc"
     ]
   }, 
+  {
+    "deps": [
+      "gpr", 
+      "gpr_test_util", 
+      "grpc", 
+      "grpc++", 
+      "grpc_test_util"
+    ], 
+    "headers": [], 
+    "language": "c++", 
+    "name": "fixed_size_thread_pool_test", 
+    "src": [
+      "test/cpp/server/fixed_size_thread_pool_test.cc"
+    ]
+  }, 
   {
     "deps": [
       "gpr", 
@@ -1589,21 +1604,6 @@
       "test/cpp/qps/sync_unary_ping_pong_test.cc"
     ]
   }, 
-  {
-    "deps": [
-      "gpr", 
-      "gpr_test_util", 
-      "grpc", 
-      "grpc++", 
-      "grpc_test_util"
-    ], 
-    "headers": [], 
-    "language": "c++", 
-    "name": "thread_pool_test", 
-    "src": [
-      "test/cpp/server/thread_pool_test.cc"
-    ]
-  }, 
   {
     "deps": [
       "gpr", 
@@ -10375,6 +10375,7 @@
       "include/grpc++/config_protobuf.h", 
       "include/grpc++/create_channel.h", 
       "include/grpc++/credentials.h", 
+      "include/grpc++/fixed_size_thread_pool.h", 
       "include/grpc++/generic_stub.h", 
       "include/grpc++/impl/call.h", 
       "include/grpc++/impl/client_unary_call.h", 
@@ -10405,8 +10406,7 @@
       "src/cpp/client/secure_credentials.h", 
       "src/cpp/common/create_auth_context.h", 
       "src/cpp/common/secure_auth_context.h", 
-      "src/cpp/server/secure_server_credentials.h", 
-      "src/cpp/server/thread_pool.h"
+      "src/cpp/server/secure_server_credentials.h"
     ], 
     "language": "c++", 
     "name": "grpc++", 
@@ -10423,6 +10423,7 @@
       "include/grpc++/config_protobuf.h", 
       "include/grpc++/create_channel.h", 
       "include/grpc++/credentials.h", 
+      "include/grpc++/fixed_size_thread_pool.h", 
       "include/grpc++/generic_stub.h", 
       "include/grpc++/impl/call.h", 
       "include/grpc++/impl/client_unary_call.h", 
@@ -10471,6 +10472,7 @@
       "src/cpp/proto/proto_utils.cc", 
       "src/cpp/server/async_generic_service.cc", 
       "src/cpp/server/create_default_thread_pool.cc", 
+      "src/cpp/server/fixed_size_thread_pool.cc", 
       "src/cpp/server/insecure_server_credentials.cc", 
       "src/cpp/server/secure_server_credentials.cc", 
       "src/cpp/server/secure_server_credentials.h", 
@@ -10478,8 +10480,6 @@
       "src/cpp/server/server_builder.cc", 
       "src/cpp/server/server_context.cc", 
       "src/cpp/server/server_credentials.cc", 
-      "src/cpp/server/thread_pool.cc", 
-      "src/cpp/server/thread_pool.h", 
       "src/cpp/util/byte_buffer.cc", 
       "src/cpp/util/slice.cc", 
       "src/cpp/util/status.cc", 
@@ -10546,6 +10546,7 @@
       "include/grpc++/config_protobuf.h", 
       "include/grpc++/create_channel.h", 
       "include/grpc++/credentials.h", 
+      "include/grpc++/fixed_size_thread_pool.h", 
       "include/grpc++/generic_stub.h", 
       "include/grpc++/impl/call.h", 
       "include/grpc++/impl/client_unary_call.h", 
@@ -10573,8 +10574,7 @@
       "include/grpc++/thread_pool_interface.h", 
       "include/grpc++/time.h", 
       "src/cpp/client/channel.h", 
-      "src/cpp/common/create_auth_context.h", 
-      "src/cpp/server/thread_pool.h"
+      "src/cpp/common/create_auth_context.h"
     ], 
     "language": "c++", 
     "name": "grpc++_unsecure", 
@@ -10591,6 +10591,7 @@
       "include/grpc++/config_protobuf.h", 
       "include/grpc++/create_channel.h", 
       "include/grpc++/credentials.h", 
+      "include/grpc++/fixed_size_thread_pool.h", 
       "include/grpc++/generic_stub.h", 
       "include/grpc++/impl/call.h", 
       "include/grpc++/impl/client_unary_call.h", 
@@ -10634,13 +10635,12 @@
       "src/cpp/proto/proto_utils.cc", 
       "src/cpp/server/async_generic_service.cc", 
       "src/cpp/server/create_default_thread_pool.cc", 
+      "src/cpp/server/fixed_size_thread_pool.cc", 
       "src/cpp/server/insecure_server_credentials.cc", 
       "src/cpp/server/server.cc", 
       "src/cpp/server/server_builder.cc", 
       "src/cpp/server/server_context.cc", 
       "src/cpp/server/server_credentials.cc", 
-      "src/cpp/server/thread_pool.cc", 
-      "src/cpp/server/thread_pool.h", 
       "src/cpp/util/byte_buffer.cc", 
       "src/cpp/util/slice.cc", 
       "src/cpp/util/status.cc", 
diff --git a/tools/run_tests/tests.json b/tools/run_tests/tests.json
index a00b9d945c4..9ea52673870 100644
--- a/tools/run_tests/tests.json
+++ b/tools/run_tests/tests.json
@@ -684,6 +684,15 @@
       "posix"
     ]
   }, 
+  {
+    "flaky": false, 
+    "language": "c++", 
+    "name": "fixed_size_thread_pool_test", 
+    "platforms": [
+      "windows", 
+      "posix"
+    ]
+  }, 
   {
     "flaky": false, 
     "language": "c++", 
@@ -774,15 +783,6 @@
       "posix"
     ]
   }, 
-  {
-    "flaky": false, 
-    "language": "c++", 
-    "name": "thread_pool_test", 
-    "platforms": [
-      "windows", 
-      "posix"
-    ]
-  }, 
   {
     "flaky": false, 
     "language": "c++", 
diff --git a/vsprojects/grpc++/grpc++.vcxproj b/vsprojects/grpc++/grpc++.vcxproj
index c1a32656cfc..c42f021460c 100644
--- a/vsprojects/grpc++/grpc++.vcxproj
+++ b/vsprojects/grpc++/grpc++.vcxproj
@@ -158,6 +158,7 @@
     <ClInclude Include="..\..\include\grpc++\config_protobuf.h" />
     <ClInclude Include="..\..\include\grpc++\create_channel.h" />
     <ClInclude Include="..\..\include\grpc++\credentials.h" />
+    <ClInclude Include="..\..\include\grpc++\fixed_size_thread_pool.h" />
     <ClInclude Include="..\..\include\grpc++\generic_stub.h" />
     <ClInclude Include="..\..\include\grpc++\impl\call.h" />
     <ClInclude Include="..\..\include\grpc++\impl\client_unary_call.h" />
@@ -191,7 +192,6 @@
     <ClInclude Include="..\..\src\cpp\server\secure_server_credentials.h" />
     <ClInclude Include="..\..\src\cpp\client\channel.h" />
     <ClInclude Include="..\..\src\cpp\common\create_auth_context.h" />
-    <ClInclude Include="..\..\src\cpp\server\thread_pool.h" />
   </ItemGroup>
   <ItemGroup>
     <ClCompile Include="..\..\src\cpp\client\secure_channel_arguments.cc">
@@ -232,6 +232,8 @@
     </ClCompile>
     <ClCompile Include="..\..\src\cpp\server\create_default_thread_pool.cc">
     </ClCompile>
+    <ClCompile Include="..\..\src\cpp\server\fixed_size_thread_pool.cc">
+    </ClCompile>
     <ClCompile Include="..\..\src\cpp\server\insecure_server_credentials.cc">
     </ClCompile>
     <ClCompile Include="..\..\src\cpp\server\server.cc">
@@ -242,8 +244,6 @@
     </ClCompile>
     <ClCompile Include="..\..\src\cpp\server\server_credentials.cc">
     </ClCompile>
-    <ClCompile Include="..\..\src\cpp\server\thread_pool.cc">
-    </ClCompile>
     <ClCompile Include="..\..\src\cpp\util\byte_buffer.cc">
     </ClCompile>
     <ClCompile Include="..\..\src\cpp\util\slice.cc">
diff --git a/vsprojects/grpc++/grpc++.vcxproj.filters b/vsprojects/grpc++/grpc++.vcxproj.filters
index e63c77a53d8..33dabe93ec5 100644
--- a/vsprojects/grpc++/grpc++.vcxproj.filters
+++ b/vsprojects/grpc++/grpc++.vcxproj.filters
@@ -58,6 +58,9 @@
     <ClCompile Include="..\..\src\cpp\server\create_default_thread_pool.cc">
       <Filter>src\cpp\server</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\src\cpp\server\fixed_size_thread_pool.cc">
+      <Filter>src\cpp\server</Filter>
+    </ClCompile>
     <ClCompile Include="..\..\src\cpp\server\insecure_server_credentials.cc">
       <Filter>src\cpp\server</Filter>
     </ClCompile>
@@ -73,9 +76,6 @@
     <ClCompile Include="..\..\src\cpp\server\server_credentials.cc">
       <Filter>src\cpp\server</Filter>
     </ClCompile>
-    <ClCompile Include="..\..\src\cpp\server\thread_pool.cc">
-      <Filter>src\cpp\server</Filter>
-    </ClCompile>
     <ClCompile Include="..\..\src\cpp\util\byte_buffer.cc">
       <Filter>src\cpp\util</Filter>
     </ClCompile>
@@ -126,6 +126,9 @@
     <ClInclude Include="..\..\include\grpc++\credentials.h">
       <Filter>include\grpc++</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\include\grpc++\fixed_size_thread_pool.h">
+      <Filter>include\grpc++</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\include\grpc++\generic_stub.h">
       <Filter>include\grpc++</Filter>
     </ClInclude>
@@ -221,9 +224,6 @@
     <ClInclude Include="..\..\src\cpp\common\create_auth_context.h">
       <Filter>src\cpp\common</Filter>
     </ClInclude>
-    <ClInclude Include="..\..\src\cpp\server\thread_pool.h">
-      <Filter>src\cpp\server</Filter>
-    </ClInclude>
   </ItemGroup>
 
   <ItemGroup>
diff --git a/vsprojects/grpc++_unsecure/grpc++_unsecure.vcxproj b/vsprojects/grpc++_unsecure/grpc++_unsecure.vcxproj
index 944e7e00013..516e47b09a9 100644
--- a/vsprojects/grpc++_unsecure/grpc++_unsecure.vcxproj
+++ b/vsprojects/grpc++_unsecure/grpc++_unsecure.vcxproj
@@ -158,6 +158,7 @@
     <ClInclude Include="..\..\include\grpc++\config_protobuf.h" />
     <ClInclude Include="..\..\include\grpc++\create_channel.h" />
     <ClInclude Include="..\..\include\grpc++\credentials.h" />
+    <ClInclude Include="..\..\include\grpc++\fixed_size_thread_pool.h" />
     <ClInclude Include="..\..\include\grpc++\generic_stub.h" />
     <ClInclude Include="..\..\include\grpc++\impl\call.h" />
     <ClInclude Include="..\..\include\grpc++\impl\client_unary_call.h" />
@@ -188,7 +189,6 @@
   <ItemGroup>
     <ClInclude Include="..\..\src\cpp\client\channel.h" />
     <ClInclude Include="..\..\src\cpp\common\create_auth_context.h" />
-    <ClInclude Include="..\..\src\cpp\server\thread_pool.h" />
   </ItemGroup>
   <ItemGroup>
     <ClCompile Include="..\..\src\cpp\common\insecure_create_auth_context.cc">
@@ -221,6 +221,8 @@
     </ClCompile>
     <ClCompile Include="..\..\src\cpp\server\create_default_thread_pool.cc">
     </ClCompile>
+    <ClCompile Include="..\..\src\cpp\server\fixed_size_thread_pool.cc">
+    </ClCompile>
     <ClCompile Include="..\..\src\cpp\server\insecure_server_credentials.cc">
     </ClCompile>
     <ClCompile Include="..\..\src\cpp\server\server.cc">
@@ -231,8 +233,6 @@
     </ClCompile>
     <ClCompile Include="..\..\src\cpp\server\server_credentials.cc">
     </ClCompile>
-    <ClCompile Include="..\..\src\cpp\server\thread_pool.cc">
-    </ClCompile>
     <ClCompile Include="..\..\src\cpp\util\byte_buffer.cc">
     </ClCompile>
     <ClCompile Include="..\..\src\cpp\util\slice.cc">
diff --git a/vsprojects/grpc++_unsecure/grpc++_unsecure.vcxproj.filters b/vsprojects/grpc++_unsecure/grpc++_unsecure.vcxproj.filters
index 73b0a5dccdb..d65f9e95651 100644
--- a/vsprojects/grpc++_unsecure/grpc++_unsecure.vcxproj.filters
+++ b/vsprojects/grpc++_unsecure/grpc++_unsecure.vcxproj.filters
@@ -46,6 +46,9 @@
     <ClCompile Include="..\..\src\cpp\server\create_default_thread_pool.cc">
       <Filter>src\cpp\server</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\src\cpp\server\fixed_size_thread_pool.cc">
+      <Filter>src\cpp\server</Filter>
+    </ClCompile>
     <ClCompile Include="..\..\src\cpp\server\insecure_server_credentials.cc">
       <Filter>src\cpp\server</Filter>
     </ClCompile>
@@ -61,9 +64,6 @@
     <ClCompile Include="..\..\src\cpp\server\server_credentials.cc">
       <Filter>src\cpp\server</Filter>
     </ClCompile>
-    <ClCompile Include="..\..\src\cpp\server\thread_pool.cc">
-      <Filter>src\cpp\server</Filter>
-    </ClCompile>
     <ClCompile Include="..\..\src\cpp\util\byte_buffer.cc">
       <Filter>src\cpp\util</Filter>
     </ClCompile>
@@ -114,6 +114,9 @@
     <ClInclude Include="..\..\include\grpc++\credentials.h">
       <Filter>include\grpc++</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\include\grpc++\fixed_size_thread_pool.h">
+      <Filter>include\grpc++</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\include\grpc++\generic_stub.h">
       <Filter>include\grpc++</Filter>
     </ClInclude>
@@ -200,9 +203,6 @@
     <ClInclude Include="..\..\src\cpp\common\create_auth_context.h">
       <Filter>src\cpp\common</Filter>
     </ClInclude>
-    <ClInclude Include="..\..\src\cpp\server\thread_pool.h">
-      <Filter>src\cpp\server</Filter>
-    </ClInclude>
   </ItemGroup>
 
   <ItemGroup>