diff --git a/Makefile b/Makefile
index 1c85ff079cb..c1a8b3591c4 100644
--- a/Makefile
+++ b/Makefile
@@ -1167,6 +1167,8 @@ buildtests_cxx: privatelibs_cxx $(BINDIR)/$(CONFIG)/async_end2end_test $(BINDIR)
 
 test: test_c test_cxx
 
+flaky_test: flaky_test_c flaky_test_cxx
+
 test_c: buildtests_c
 	$(E) "[RUN]     Testing alarm_heap_test"
 	$(Q) $(BINDIR)/$(CONFIG)/alarm_heap_test || ( echo test alarm_heap_test failed ; exit 1 )
@@ -1180,16 +1182,6 @@ test_c: buildtests_c
 	$(Q) $(BINDIR)/$(CONFIG)/bin_encoder_test || ( echo test bin_encoder_test failed ; exit 1 )
 	$(E) "[RUN]     Testing census_hash_table_test"
 	$(Q) $(BINDIR)/$(CONFIG)/census_hash_table_test || ( echo test census_hash_table_test failed ; exit 1 )
-	$(E) "[RUN]     Testing census_statistics_multiple_writers_circular_buffer_test"
-	$(Q) $(BINDIR)/$(CONFIG)/census_statistics_multiple_writers_circular_buffer_test || ( echo test census_statistics_multiple_writers_circular_buffer_test failed ; exit 1 )
-	$(E) "[RUN]     Testing census_statistics_multiple_writers_test"
-	$(Q) $(BINDIR)/$(CONFIG)/census_statistics_multiple_writers_test || ( echo test census_statistics_multiple_writers_test failed ; exit 1 )
-	$(E) "[RUN]     Testing census_statistics_performance_test"
-	$(Q) $(BINDIR)/$(CONFIG)/census_statistics_performance_test || ( echo test census_statistics_performance_test failed ; exit 1 )
-	$(E) "[RUN]     Testing census_statistics_quick_test"
-	$(Q) $(BINDIR)/$(CONFIG)/census_statistics_quick_test || ( echo test census_statistics_quick_test failed ; exit 1 )
-	$(E) "[RUN]     Testing census_statistics_small_log_test"
-	$(Q) $(BINDIR)/$(CONFIG)/census_statistics_small_log_test || ( echo test census_statistics_small_log_test failed ; exit 1 )
 	$(E) "[RUN]     Testing census_stub_test"
 	$(Q) $(BINDIR)/$(CONFIG)/census_stub_test || ( echo test census_stub_test failed ; exit 1 )
 	$(E) "[RUN]     Testing census_window_stats_test"
@@ -1302,8 +1294,6 @@ test_c: buildtests_c
 	$(Q) $(BINDIR)/$(CONFIG)/transport_security_test || ( echo test transport_security_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_fake_security_bad_hostname_test"
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_fake_security_bad_hostname_test || ( echo test chttp2_fake_security_bad_hostname_test failed ; exit 1 )
-	$(E) "[RUN]     Testing chttp2_fake_security_cancel_after_accept_test"
-	$(Q) $(BINDIR)/$(CONFIG)/chttp2_fake_security_cancel_after_accept_test || ( echo test chttp2_fake_security_cancel_after_accept_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_fake_security_cancel_after_accept_and_writes_closed_test"
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_fake_security_cancel_after_accept_and_writes_closed_test || ( echo test chttp2_fake_security_cancel_after_accept_and_writes_closed_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_fake_security_cancel_after_invoke_test"
@@ -1324,8 +1314,6 @@ test_c: buildtests_c
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_fake_security_empty_batch_test || ( echo test chttp2_fake_security_empty_batch_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_fake_security_graceful_server_shutdown_test"
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_fake_security_graceful_server_shutdown_test || ( echo test chttp2_fake_security_graceful_server_shutdown_test failed ; exit 1 )
-	$(E) "[RUN]     Testing chttp2_fake_security_invoke_large_request_test"
-	$(Q) $(BINDIR)/$(CONFIG)/chttp2_fake_security_invoke_large_request_test || ( echo test chttp2_fake_security_invoke_large_request_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_fake_security_max_concurrent_streams_test"
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_fake_security_max_concurrent_streams_test || ( echo test chttp2_fake_security_max_concurrent_streams_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_fake_security_max_message_length_test"
@@ -1360,8 +1348,6 @@ test_c: buildtests_c
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_fake_security_simple_request_with_high_initial_sequence_number_test || ( echo test chttp2_fake_security_simple_request_with_high_initial_sequence_number_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_fullstack_bad_hostname_test"
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_fullstack_bad_hostname_test || ( echo test chttp2_fullstack_bad_hostname_test failed ; exit 1 )
-	$(E) "[RUN]     Testing chttp2_fullstack_cancel_after_accept_test"
-	$(Q) $(BINDIR)/$(CONFIG)/chttp2_fullstack_cancel_after_accept_test || ( echo test chttp2_fullstack_cancel_after_accept_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_fullstack_cancel_after_accept_and_writes_closed_test"
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_fullstack_cancel_after_accept_and_writes_closed_test || ( echo test chttp2_fullstack_cancel_after_accept_and_writes_closed_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_fullstack_cancel_after_invoke_test"
@@ -1382,8 +1368,6 @@ test_c: buildtests_c
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_fullstack_empty_batch_test || ( echo test chttp2_fullstack_empty_batch_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_fullstack_graceful_server_shutdown_test"
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_fullstack_graceful_server_shutdown_test || ( echo test chttp2_fullstack_graceful_server_shutdown_test failed ; exit 1 )
-	$(E) "[RUN]     Testing chttp2_fullstack_invoke_large_request_test"
-	$(Q) $(BINDIR)/$(CONFIG)/chttp2_fullstack_invoke_large_request_test || ( echo test chttp2_fullstack_invoke_large_request_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_fullstack_max_concurrent_streams_test"
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_fullstack_max_concurrent_streams_test || ( echo test chttp2_fullstack_max_concurrent_streams_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_fullstack_max_message_length_test"
@@ -1418,8 +1402,6 @@ test_c: buildtests_c
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_fullstack_simple_request_with_high_initial_sequence_number_test || ( echo test chttp2_fullstack_simple_request_with_high_initial_sequence_number_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_fullstack_uds_posix_bad_hostname_test"
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_bad_hostname_test || ( echo test chttp2_fullstack_uds_posix_bad_hostname_test failed ; exit 1 )
-	$(E) "[RUN]     Testing chttp2_fullstack_uds_posix_cancel_after_accept_test"
-	$(Q) $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_cancel_after_accept_test || ( echo test chttp2_fullstack_uds_posix_cancel_after_accept_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_fullstack_uds_posix_cancel_after_accept_and_writes_closed_test"
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_cancel_after_accept_and_writes_closed_test || ( echo test chttp2_fullstack_uds_posix_cancel_after_accept_and_writes_closed_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_fullstack_uds_posix_cancel_after_invoke_test"
@@ -1440,8 +1422,6 @@ test_c: buildtests_c
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_empty_batch_test || ( echo test chttp2_fullstack_uds_posix_empty_batch_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_fullstack_uds_posix_graceful_server_shutdown_test"
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_graceful_server_shutdown_test || ( echo test chttp2_fullstack_uds_posix_graceful_server_shutdown_test failed ; exit 1 )
-	$(E) "[RUN]     Testing chttp2_fullstack_uds_posix_invoke_large_request_test"
-	$(Q) $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_invoke_large_request_test || ( echo test chttp2_fullstack_uds_posix_invoke_large_request_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_fullstack_uds_posix_max_concurrent_streams_test"
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_max_concurrent_streams_test || ( echo test chttp2_fullstack_uds_posix_max_concurrent_streams_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_fullstack_uds_posix_max_message_length_test"
@@ -1476,8 +1456,6 @@ test_c: buildtests_c
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_simple_request_with_high_initial_sequence_number_test || ( echo test chttp2_fullstack_uds_posix_simple_request_with_high_initial_sequence_number_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_simple_ssl_fullstack_bad_hostname_test"
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_fullstack_bad_hostname_test || ( echo test chttp2_simple_ssl_fullstack_bad_hostname_test failed ; exit 1 )
-	$(E) "[RUN]     Testing chttp2_simple_ssl_fullstack_cancel_after_accept_test"
-	$(Q) $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_fullstack_cancel_after_accept_test || ( echo test chttp2_simple_ssl_fullstack_cancel_after_accept_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_simple_ssl_fullstack_cancel_after_accept_and_writes_closed_test"
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_fullstack_cancel_after_accept_and_writes_closed_test || ( echo test chttp2_simple_ssl_fullstack_cancel_after_accept_and_writes_closed_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_simple_ssl_fullstack_cancel_after_invoke_test"
@@ -1498,8 +1476,6 @@ test_c: buildtests_c
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_fullstack_empty_batch_test || ( echo test chttp2_simple_ssl_fullstack_empty_batch_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_simple_ssl_fullstack_graceful_server_shutdown_test"
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_fullstack_graceful_server_shutdown_test || ( echo test chttp2_simple_ssl_fullstack_graceful_server_shutdown_test failed ; exit 1 )
-	$(E) "[RUN]     Testing chttp2_simple_ssl_fullstack_invoke_large_request_test"
-	$(Q) $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_fullstack_invoke_large_request_test || ( echo test chttp2_simple_ssl_fullstack_invoke_large_request_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_simple_ssl_fullstack_max_concurrent_streams_test"
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_fullstack_max_concurrent_streams_test || ( echo test chttp2_simple_ssl_fullstack_max_concurrent_streams_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_simple_ssl_fullstack_max_message_length_test"
@@ -1534,8 +1510,6 @@ test_c: buildtests_c
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_fullstack_simple_request_with_high_initial_sequence_number_test || ( echo test chttp2_simple_ssl_fullstack_simple_request_with_high_initial_sequence_number_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_simple_ssl_with_oauth2_fullstack_bad_hostname_test"
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_bad_hostname_test || ( echo test chttp2_simple_ssl_with_oauth2_fullstack_bad_hostname_test failed ; exit 1 )
-	$(E) "[RUN]     Testing chttp2_simple_ssl_with_oauth2_fullstack_cancel_after_accept_test"
-	$(Q) $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_cancel_after_accept_test || ( echo test chttp2_simple_ssl_with_oauth2_fullstack_cancel_after_accept_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_simple_ssl_with_oauth2_fullstack_cancel_after_accept_and_writes_closed_test"
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_cancel_after_accept_and_writes_closed_test || ( echo test chttp2_simple_ssl_with_oauth2_fullstack_cancel_after_accept_and_writes_closed_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_simple_ssl_with_oauth2_fullstack_cancel_after_invoke_test"
@@ -1556,8 +1530,6 @@ test_c: buildtests_c
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_empty_batch_test || ( echo test chttp2_simple_ssl_with_oauth2_fullstack_empty_batch_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_simple_ssl_with_oauth2_fullstack_graceful_server_shutdown_test"
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_graceful_server_shutdown_test || ( echo test chttp2_simple_ssl_with_oauth2_fullstack_graceful_server_shutdown_test failed ; exit 1 )
-	$(E) "[RUN]     Testing chttp2_simple_ssl_with_oauth2_fullstack_invoke_large_request_test"
-	$(Q) $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_invoke_large_request_test || ( echo test chttp2_simple_ssl_with_oauth2_fullstack_invoke_large_request_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_simple_ssl_with_oauth2_fullstack_max_concurrent_streams_test"
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_max_concurrent_streams_test || ( echo test chttp2_simple_ssl_with_oauth2_fullstack_max_concurrent_streams_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_simple_ssl_with_oauth2_fullstack_max_message_length_test"
@@ -1592,8 +1564,6 @@ test_c: buildtests_c
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_simple_request_with_high_initial_sequence_number_test || ( echo test chttp2_simple_ssl_with_oauth2_fullstack_simple_request_with_high_initial_sequence_number_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_socket_pair_bad_hostname_test"
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_socket_pair_bad_hostname_test || ( echo test chttp2_socket_pair_bad_hostname_test failed ; exit 1 )
-	$(E) "[RUN]     Testing chttp2_socket_pair_cancel_after_accept_test"
-	$(Q) $(BINDIR)/$(CONFIG)/chttp2_socket_pair_cancel_after_accept_test || ( echo test chttp2_socket_pair_cancel_after_accept_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_socket_pair_cancel_after_accept_and_writes_closed_test"
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_socket_pair_cancel_after_accept_and_writes_closed_test || ( echo test chttp2_socket_pair_cancel_after_accept_and_writes_closed_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_socket_pair_cancel_after_invoke_test"
@@ -1614,8 +1584,6 @@ test_c: buildtests_c
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_socket_pair_empty_batch_test || ( echo test chttp2_socket_pair_empty_batch_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_socket_pair_graceful_server_shutdown_test"
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_socket_pair_graceful_server_shutdown_test || ( echo test chttp2_socket_pair_graceful_server_shutdown_test failed ; exit 1 )
-	$(E) "[RUN]     Testing chttp2_socket_pair_invoke_large_request_test"
-	$(Q) $(BINDIR)/$(CONFIG)/chttp2_socket_pair_invoke_large_request_test || ( echo test chttp2_socket_pair_invoke_large_request_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_socket_pair_max_concurrent_streams_test"
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_socket_pair_max_concurrent_streams_test || ( echo test chttp2_socket_pair_max_concurrent_streams_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_socket_pair_max_message_length_test"
@@ -1650,8 +1618,6 @@ test_c: buildtests_c
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_socket_pair_simple_request_with_high_initial_sequence_number_test || ( echo test chttp2_socket_pair_simple_request_with_high_initial_sequence_number_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_socket_pair_one_byte_at_a_time_bad_hostname_test"
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_bad_hostname_test || ( echo test chttp2_socket_pair_one_byte_at_a_time_bad_hostname_test failed ; exit 1 )
-	$(E) "[RUN]     Testing chttp2_socket_pair_one_byte_at_a_time_cancel_after_accept_test"
-	$(Q) $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_cancel_after_accept_test || ( echo test chttp2_socket_pair_one_byte_at_a_time_cancel_after_accept_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_socket_pair_one_byte_at_a_time_cancel_after_accept_and_writes_closed_test"
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_cancel_after_accept_and_writes_closed_test || ( echo test chttp2_socket_pair_one_byte_at_a_time_cancel_after_accept_and_writes_closed_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_socket_pair_one_byte_at_a_time_cancel_after_invoke_test"
@@ -1672,8 +1638,6 @@ test_c: buildtests_c
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_empty_batch_test || ( echo test chttp2_socket_pair_one_byte_at_a_time_empty_batch_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_socket_pair_one_byte_at_a_time_graceful_server_shutdown_test"
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_graceful_server_shutdown_test || ( echo test chttp2_socket_pair_one_byte_at_a_time_graceful_server_shutdown_test failed ; exit 1 )
-	$(E) "[RUN]     Testing chttp2_socket_pair_one_byte_at_a_time_invoke_large_request_test"
-	$(Q) $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_invoke_large_request_test || ( echo test chttp2_socket_pair_one_byte_at_a_time_invoke_large_request_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_socket_pair_one_byte_at_a_time_max_concurrent_streams_test"
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_max_concurrent_streams_test || ( echo test chttp2_socket_pair_one_byte_at_a_time_max_concurrent_streams_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_socket_pair_one_byte_at_a_time_max_message_length_test"
@@ -1708,8 +1672,6 @@ test_c: buildtests_c
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_simple_request_with_high_initial_sequence_number_test || ( echo test chttp2_socket_pair_one_byte_at_a_time_simple_request_with_high_initial_sequence_number_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_socket_pair_with_grpc_trace_bad_hostname_test"
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_socket_pair_with_grpc_trace_bad_hostname_test || ( echo test chttp2_socket_pair_with_grpc_trace_bad_hostname_test failed ; exit 1 )
-	$(E) "[RUN]     Testing chttp2_socket_pair_with_grpc_trace_cancel_after_accept_test"
-	$(Q) $(BINDIR)/$(CONFIG)/chttp2_socket_pair_with_grpc_trace_cancel_after_accept_test || ( echo test chttp2_socket_pair_with_grpc_trace_cancel_after_accept_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_socket_pair_with_grpc_trace_cancel_after_accept_and_writes_closed_test"
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_socket_pair_with_grpc_trace_cancel_after_accept_and_writes_closed_test || ( echo test chttp2_socket_pair_with_grpc_trace_cancel_after_accept_and_writes_closed_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_socket_pair_with_grpc_trace_cancel_after_invoke_test"
@@ -1730,8 +1692,6 @@ test_c: buildtests_c
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_socket_pair_with_grpc_trace_empty_batch_test || ( echo test chttp2_socket_pair_with_grpc_trace_empty_batch_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_socket_pair_with_grpc_trace_graceful_server_shutdown_test"
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_socket_pair_with_grpc_trace_graceful_server_shutdown_test || ( echo test chttp2_socket_pair_with_grpc_trace_graceful_server_shutdown_test failed ; exit 1 )
-	$(E) "[RUN]     Testing chttp2_socket_pair_with_grpc_trace_invoke_large_request_test"
-	$(Q) $(BINDIR)/$(CONFIG)/chttp2_socket_pair_with_grpc_trace_invoke_large_request_test || ( echo test chttp2_socket_pair_with_grpc_trace_invoke_large_request_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_socket_pair_with_grpc_trace_max_concurrent_streams_test"
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_socket_pair_with_grpc_trace_max_concurrent_streams_test || ( echo test chttp2_socket_pair_with_grpc_trace_max_concurrent_streams_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_socket_pair_with_grpc_trace_max_message_length_test"
@@ -1788,8 +1748,6 @@ test_c: buildtests_c
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_fullstack_empty_batch_unsecure_test || ( echo test chttp2_fullstack_empty_batch_unsecure_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_fullstack_graceful_server_shutdown_unsecure_test"
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_fullstack_graceful_server_shutdown_unsecure_test || ( echo test chttp2_fullstack_graceful_server_shutdown_unsecure_test failed ; exit 1 )
-	$(E) "[RUN]     Testing chttp2_fullstack_invoke_large_request_unsecure_test"
-	$(Q) $(BINDIR)/$(CONFIG)/chttp2_fullstack_invoke_large_request_unsecure_test || ( echo test chttp2_fullstack_invoke_large_request_unsecure_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_fullstack_max_concurrent_streams_unsecure_test"
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_fullstack_max_concurrent_streams_unsecure_test || ( echo test chttp2_fullstack_max_concurrent_streams_unsecure_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_fullstack_max_message_length_unsecure_test"
@@ -1844,8 +1802,6 @@ test_c: buildtests_c
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_empty_batch_unsecure_test || ( echo test chttp2_fullstack_uds_posix_empty_batch_unsecure_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_fullstack_uds_posix_graceful_server_shutdown_unsecure_test"
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_graceful_server_shutdown_unsecure_test || ( echo test chttp2_fullstack_uds_posix_graceful_server_shutdown_unsecure_test failed ; exit 1 )
-	$(E) "[RUN]     Testing chttp2_fullstack_uds_posix_invoke_large_request_unsecure_test"
-	$(Q) $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_invoke_large_request_unsecure_test || ( echo test chttp2_fullstack_uds_posix_invoke_large_request_unsecure_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_fullstack_uds_posix_max_concurrent_streams_unsecure_test"
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_max_concurrent_streams_unsecure_test || ( echo test chttp2_fullstack_uds_posix_max_concurrent_streams_unsecure_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_fullstack_uds_posix_max_message_length_unsecure_test"
@@ -1900,8 +1856,6 @@ test_c: buildtests_c
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_socket_pair_empty_batch_unsecure_test || ( echo test chttp2_socket_pair_empty_batch_unsecure_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_socket_pair_graceful_server_shutdown_unsecure_test"
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_socket_pair_graceful_server_shutdown_unsecure_test || ( echo test chttp2_socket_pair_graceful_server_shutdown_unsecure_test failed ; exit 1 )
-	$(E) "[RUN]     Testing chttp2_socket_pair_invoke_large_request_unsecure_test"
-	$(Q) $(BINDIR)/$(CONFIG)/chttp2_socket_pair_invoke_large_request_unsecure_test || ( echo test chttp2_socket_pair_invoke_large_request_unsecure_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_socket_pair_max_concurrent_streams_unsecure_test"
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_socket_pair_max_concurrent_streams_unsecure_test || ( echo test chttp2_socket_pair_max_concurrent_streams_unsecure_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_socket_pair_max_message_length_unsecure_test"
@@ -1956,8 +1910,6 @@ test_c: buildtests_c
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_empty_batch_unsecure_test || ( echo test chttp2_socket_pair_one_byte_at_a_time_empty_batch_unsecure_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_socket_pair_one_byte_at_a_time_graceful_server_shutdown_unsecure_test"
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_graceful_server_shutdown_unsecure_test || ( echo test chttp2_socket_pair_one_byte_at_a_time_graceful_server_shutdown_unsecure_test failed ; exit 1 )
-	$(E) "[RUN]     Testing chttp2_socket_pair_one_byte_at_a_time_invoke_large_request_unsecure_test"
-	$(Q) $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_invoke_large_request_unsecure_test || ( echo test chttp2_socket_pair_one_byte_at_a_time_invoke_large_request_unsecure_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_socket_pair_one_byte_at_a_time_max_concurrent_streams_unsecure_test"
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_max_concurrent_streams_unsecure_test || ( echo test chttp2_socket_pair_one_byte_at_a_time_max_concurrent_streams_unsecure_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_socket_pair_one_byte_at_a_time_max_message_length_unsecure_test"
@@ -2012,8 +1964,6 @@ test_c: buildtests_c
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_socket_pair_with_grpc_trace_empty_batch_unsecure_test || ( echo test chttp2_socket_pair_with_grpc_trace_empty_batch_unsecure_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_socket_pair_with_grpc_trace_graceful_server_shutdown_unsecure_test"
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_socket_pair_with_grpc_trace_graceful_server_shutdown_unsecure_test || ( echo test chttp2_socket_pair_with_grpc_trace_graceful_server_shutdown_unsecure_test failed ; exit 1 )
-	$(E) "[RUN]     Testing chttp2_socket_pair_with_grpc_trace_invoke_large_request_unsecure_test"
-	$(Q) $(BINDIR)/$(CONFIG)/chttp2_socket_pair_with_grpc_trace_invoke_large_request_unsecure_test || ( echo test chttp2_socket_pair_with_grpc_trace_invoke_large_request_unsecure_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_socket_pair_with_grpc_trace_max_concurrent_streams_unsecure_test"
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_socket_pair_with_grpc_trace_max_concurrent_streams_unsecure_test || ( echo test chttp2_socket_pair_with_grpc_trace_max_concurrent_streams_unsecure_test failed ; exit 1 )
 	$(E) "[RUN]     Testing chttp2_socket_pair_with_grpc_trace_max_message_length_unsecure_test"
@@ -2046,6 +1996,61 @@ test_c: buildtests_c
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_socket_pair_with_grpc_trace_simple_request_with_high_initial_sequence_number_unsecure_test || ( echo test chttp2_socket_pair_with_grpc_trace_simple_request_with_high_initial_sequence_number_unsecure_test failed ; exit 1 )
 
 
+flaky_test_c: buildtests_c
+	$(E) "[RUN]     Testing census_statistics_multiple_writers_circular_buffer_test"
+	$(Q) $(BINDIR)/$(CONFIG)/census_statistics_multiple_writers_circular_buffer_test || ( echo test census_statistics_multiple_writers_circular_buffer_test failed ; exit 1 )
+	$(E) "[RUN]     Testing census_statistics_multiple_writers_test"
+	$(Q) $(BINDIR)/$(CONFIG)/census_statistics_multiple_writers_test || ( echo test census_statistics_multiple_writers_test failed ; exit 1 )
+	$(E) "[RUN]     Testing census_statistics_performance_test"
+	$(Q) $(BINDIR)/$(CONFIG)/census_statistics_performance_test || ( echo test census_statistics_performance_test failed ; exit 1 )
+	$(E) "[RUN]     Testing census_statistics_quick_test"
+	$(Q) $(BINDIR)/$(CONFIG)/census_statistics_quick_test || ( echo test census_statistics_quick_test failed ; exit 1 )
+	$(E) "[RUN]     Testing census_statistics_small_log_test"
+	$(Q) $(BINDIR)/$(CONFIG)/census_statistics_small_log_test || ( echo test census_statistics_small_log_test failed ; exit 1 )
+	$(E) "[RUN]     Testing chttp2_fake_security_cancel_after_accept_test"
+	$(Q) $(BINDIR)/$(CONFIG)/chttp2_fake_security_cancel_after_accept_test || ( echo test chttp2_fake_security_cancel_after_accept_test failed ; exit 1 )
+	$(E) "[RUN]     Testing chttp2_fake_security_invoke_large_request_test"
+	$(Q) $(BINDIR)/$(CONFIG)/chttp2_fake_security_invoke_large_request_test || ( echo test chttp2_fake_security_invoke_large_request_test failed ; exit 1 )
+	$(E) "[RUN]     Testing chttp2_fullstack_cancel_after_accept_test"
+	$(Q) $(BINDIR)/$(CONFIG)/chttp2_fullstack_cancel_after_accept_test || ( echo test chttp2_fullstack_cancel_after_accept_test failed ; exit 1 )
+	$(E) "[RUN]     Testing chttp2_fullstack_invoke_large_request_test"
+	$(Q) $(BINDIR)/$(CONFIG)/chttp2_fullstack_invoke_large_request_test || ( echo test chttp2_fullstack_invoke_large_request_test failed ; exit 1 )
+	$(E) "[RUN]     Testing chttp2_fullstack_uds_posix_cancel_after_accept_test"
+	$(Q) $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_cancel_after_accept_test || ( echo test chttp2_fullstack_uds_posix_cancel_after_accept_test failed ; exit 1 )
+	$(E) "[RUN]     Testing chttp2_fullstack_uds_posix_invoke_large_request_test"
+	$(Q) $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_invoke_large_request_test || ( echo test chttp2_fullstack_uds_posix_invoke_large_request_test failed ; exit 1 )
+	$(E) "[RUN]     Testing chttp2_simple_ssl_fullstack_cancel_after_accept_test"
+	$(Q) $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_fullstack_cancel_after_accept_test || ( echo test chttp2_simple_ssl_fullstack_cancel_after_accept_test failed ; exit 1 )
+	$(E) "[RUN]     Testing chttp2_simple_ssl_fullstack_invoke_large_request_test"
+	$(Q) $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_fullstack_invoke_large_request_test || ( echo test chttp2_simple_ssl_fullstack_invoke_large_request_test failed ; exit 1 )
+	$(E) "[RUN]     Testing chttp2_simple_ssl_with_oauth2_fullstack_cancel_after_accept_test"
+	$(Q) $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_cancel_after_accept_test || ( echo test chttp2_simple_ssl_with_oauth2_fullstack_cancel_after_accept_test failed ; exit 1 )
+	$(E) "[RUN]     Testing chttp2_simple_ssl_with_oauth2_fullstack_invoke_large_request_test"
+	$(Q) $(BINDIR)/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_invoke_large_request_test || ( echo test chttp2_simple_ssl_with_oauth2_fullstack_invoke_large_request_test failed ; exit 1 )
+	$(E) "[RUN]     Testing chttp2_socket_pair_cancel_after_accept_test"
+	$(Q) $(BINDIR)/$(CONFIG)/chttp2_socket_pair_cancel_after_accept_test || ( echo test chttp2_socket_pair_cancel_after_accept_test failed ; exit 1 )
+	$(E) "[RUN]     Testing chttp2_socket_pair_invoke_large_request_test"
+	$(Q) $(BINDIR)/$(CONFIG)/chttp2_socket_pair_invoke_large_request_test || ( echo test chttp2_socket_pair_invoke_large_request_test failed ; exit 1 )
+	$(E) "[RUN]     Testing chttp2_socket_pair_one_byte_at_a_time_cancel_after_accept_test"
+	$(Q) $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_cancel_after_accept_test || ( echo test chttp2_socket_pair_one_byte_at_a_time_cancel_after_accept_test failed ; exit 1 )
+	$(E) "[RUN]     Testing chttp2_socket_pair_one_byte_at_a_time_invoke_large_request_test"
+	$(Q) $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_invoke_large_request_test || ( echo test chttp2_socket_pair_one_byte_at_a_time_invoke_large_request_test failed ; exit 1 )
+	$(E) "[RUN]     Testing chttp2_socket_pair_with_grpc_trace_cancel_after_accept_test"
+	$(Q) $(BINDIR)/$(CONFIG)/chttp2_socket_pair_with_grpc_trace_cancel_after_accept_test || ( echo test chttp2_socket_pair_with_grpc_trace_cancel_after_accept_test failed ; exit 1 )
+	$(E) "[RUN]     Testing chttp2_socket_pair_with_grpc_trace_invoke_large_request_test"
+	$(Q) $(BINDIR)/$(CONFIG)/chttp2_socket_pair_with_grpc_trace_invoke_large_request_test || ( echo test chttp2_socket_pair_with_grpc_trace_invoke_large_request_test failed ; exit 1 )
+	$(E) "[RUN]     Testing chttp2_fullstack_invoke_large_request_unsecure_test"
+	$(Q) $(BINDIR)/$(CONFIG)/chttp2_fullstack_invoke_large_request_unsecure_test || ( echo test chttp2_fullstack_invoke_large_request_unsecure_test failed ; exit 1 )
+	$(E) "[RUN]     Testing chttp2_fullstack_uds_posix_invoke_large_request_unsecure_test"
+	$(Q) $(BINDIR)/$(CONFIG)/chttp2_fullstack_uds_posix_invoke_large_request_unsecure_test || ( echo test chttp2_fullstack_uds_posix_invoke_large_request_unsecure_test failed ; exit 1 )
+	$(E) "[RUN]     Testing chttp2_socket_pair_invoke_large_request_unsecure_test"
+	$(Q) $(BINDIR)/$(CONFIG)/chttp2_socket_pair_invoke_large_request_unsecure_test || ( echo test chttp2_socket_pair_invoke_large_request_unsecure_test failed ; exit 1 )
+	$(E) "[RUN]     Testing chttp2_socket_pair_one_byte_at_a_time_invoke_large_request_unsecure_test"
+	$(Q) $(BINDIR)/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_invoke_large_request_unsecure_test || ( echo test chttp2_socket_pair_one_byte_at_a_time_invoke_large_request_unsecure_test failed ; exit 1 )
+	$(E) "[RUN]     Testing chttp2_socket_pair_with_grpc_trace_invoke_large_request_unsecure_test"
+	$(Q) $(BINDIR)/$(CONFIG)/chttp2_socket_pair_with_grpc_trace_invoke_large_request_unsecure_test || ( echo test chttp2_socket_pair_with_grpc_trace_invoke_large_request_unsecure_test failed ; exit 1 )
+
+
 test_cxx: buildtests_cxx
 	$(E) "[RUN]     Testing async_end2end_test"
 	$(Q) $(BINDIR)/$(CONFIG)/async_end2end_test || ( echo test async_end2end_test failed ; exit 1 )
@@ -2085,6 +2090,9 @@ test_cxx: buildtests_cxx
 	$(Q) $(BINDIR)/$(CONFIG)/thread_stress_test || ( echo test thread_stress_test failed ; exit 1 )
 
 
+flaky_test_cxx: buildtests_cxx
+
+
 test_python: static_c
 	$(E) "[RUN]     Testing python code"
 	$(Q) tools/run_tests/run_tests.py -lpython -c$(CONFIG)
diff --git a/src/core/iomgr/pollset_posix.c b/src/core/iomgr/pollset_posix.c
index 6552b3f3b0c..0751d1b4b7f 100644
--- a/src/core/iomgr/pollset_posix.c
+++ b/src/core/iomgr/pollset_posix.c
@@ -121,6 +121,8 @@ void grpc_pollset_del_fd(grpc_pollset *pollset, grpc_fd *fd) {
 int grpc_pollset_work(grpc_pollset *pollset, gpr_timespec deadline) {
   /* pollset->mu already held */
   gpr_timespec now = gpr_now();
+  /* FIXME(ctiller): see below */
+  gpr_timespec maximum_deadline = gpr_time_add(now, gpr_time_from_seconds(1));
   int r;
   if (gpr_time_cmp(now, deadline) > 0) {
     return 0;
@@ -131,6 +133,11 @@ int grpc_pollset_work(grpc_pollset *pollset, gpr_timespec deadline) {
   if (grpc_alarm_check(&pollset->mu, now, &deadline)) {
     return 1;
   }
+  /* FIXME(ctiller): we should not clamp deadline, however we have some
+     stuck at shutdown bugs that this resolves */
+  if (gpr_time_cmp(deadline, maximum_deadline) > 0) {
+    deadline = maximum_deadline;
+  }
   gpr_tls_set(&g_current_thread_poller, (gpr_intptr)pollset);
   r = pollset->vtable->maybe_work(pollset, deadline, now, 1);
   gpr_tls_set(&g_current_thread_poller, 0);
diff --git a/src/csharp/README.md b/src/csharp/README.md
index 37aa2ecddcd..43d519349f4 100644
--- a/src/csharp/README.md
+++ b/src/csharp/README.md
@@ -6,7 +6,7 @@ A C# implementation of gRPC.
 Status
 ------
 
-Ready for early adopters.
+Alpha : Ready for early adopters.
 
 Usage: Windows
 --------------
@@ -19,22 +19,60 @@ Usage: Windows
   That will also pull all the transitive dependencies (including the native libraries that
   gRPC C# is internally using).
 
-- TODO: link to Helloworld example
+- Helloworld project example can be found in https://github.com/grpc/grpc-common/tree/master/csharp.
 
 Usage: Linux (Mono)
 --------------
 
-- Prerequisites: Mono framework, MonoDevelop 5.9 with NuGet add-in installed.
+- Prerequisites: Mono 3.2.8+, MonoDevelop 5.9 with NuGet add-in installed.
 
-- Install gRPC C Core using instructions in https://github.com/grpc/homebrew-grpc
+- Install Linuxbrew and gRPC C Core using instructions in https://github.com/grpc/homebrew-grpc
 
-- TODO: explain using LD_LIBRARY_PATH or installation to /usr/local
+- gRPC C# depends on native shared library libgrpc_csharp_ext.so (Unix flavor of grpc_csharp_ext.dll).
+  This library will be installed to `~/.linuxbrew/lib` by the previous step.
+  To make it visible to mono, you need to:
+
+  - (preferred approach) add `libgrpc_csharp_ext.so` to `/etc/ld.so.cache` by running:
+
+    ```sh
+    echo "$HOME/.linuxbrew/lib" | sudo tee /etc/ld.so.conf.d/zzz_brew_lib.conf
+    sudo ldconfig
+    ```
+
+  - (adhoc approach) set `LD_LIBRARY_PATH` environment variable to point to directory containing `libgrpc_csharp_ext.so`:
+
+    ```sh
+    export LD_LIBRARY_PATH=$HOME/.linuxbrew/lib:${LD_LIBRARY_PATH}
+    ```
 
 - Open MonoDevelop and start a new project/solution.
 
 - Add NuGet package `Grpc` as a dependency (Project -> Add NuGet packages).
 
-- TODO: link to Helloworld example
+- Helloworld project example can be found in https://github.com/grpc/grpc-common/tree/master/csharp.
+
+Usage: MacOS (Mono)
+--------------
+
+- WARNING: As of now gRPC C# only works on 64bit version of Mono (because we don't compile
+  the native extension for C# in 32bit mode yet). That means your development experience
+  with Xamarin Studio on MacOS will not be great, as you won't be able to run your
+  code directly from Xamarin Studio (which requires 32bit version of Mono).
+
+- Prerequisites: Xamarin Studio with NuGet add-in installed.
+
+- Install Homebrew and gRPC C Core using instructions in https://github.com/grpc/homebrew-grpc
+
+- Install 64-bit version of mono with command `brew install mono` (assumes you've already installed Homebrew).
+
+- Open Xamarin Studio and start a new project/solution.
+
+- Add NuGet package `Grpc` as a dependency (Project -> Add NuGet packages).
+
+- *You will be able to build your project in Xamarin Studio, but to run or test it,
+  you will need to run it under 64-bit version of Mono.*
+
+- Helloworld project example can be found in https://github.com/grpc/grpc-common/tree/master/csharp.
 
 Building: Windows
 -----------------
@@ -47,9 +85,10 @@ If you are a user of gRPC C#, go to Usage section above.
 - The grpc_csharp_ext native library needs to be built so you can build the Grpc C# solution. You can 
   either build the native solution in `vsprojects/grpc.sln` from Visual Studio manually, or you can use
   a convenience batch script that builds everything for you.
-```
-buildall.bat
-```
+
+  ```
+  buildall.bat
+  ```
 
 - Open Grpc.sln using Visual Studio 2013. NuGet dependencies will be restored
   upon build (you need to have NuGet add-in installed).
@@ -61,11 +100,12 @@ Building: Linux & Mono
 You only need to go through these steps if you are planning to develop gRPC C#.
 If you are a user of gRPC C#, go to Usage section above.
 
-- Prerequisites for development: Mono framework, MonoDevelop 5.9 with NuGet and Nunit add-ins installed.
-```
-sudo apt-get install mono-devel
-sudo apt-get install nunit nunit-console
-```
+- Prerequisites for development: Mono 3.2.8+, MonoDevelop 5.9 with NuGet and NUnit add-ins installed.
+
+  ```sh
+  sudo apt-get install mono-devel
+  sudo apt-get install nunit nunit-console
+  ```
 
 You can use older versions of MonoDevelop, but then you might need to restore
 NuGet dependencies manually (by `nuget restore`), because older versions of MonoDevelop
@@ -73,10 +113,10 @@ don't support NuGet add-in.
 
 - Compile and install the gRPC C# extension library (that will be used via
   P/Invoke from C#).
-```
-make grpc_csharp_ext
-sudo make install_grpc_csharp_ext
-```
+  ```sh
+  make grpc_csharp_ext
+  sudo make install_grpc_csharp_ext
+  ```
 
 - Use MonoDevelop to open the solution Grpc.sln
 
@@ -95,7 +135,6 @@ Then you should be able to run all the test from the Test View.
 
 After building the solution, you can also run the tests from command line 
 using nunit-console tool.
-
 ```
 # from Grpc.Core.Test/bin/Debug directory
 nunit-console Grpc.Core.Tests.dll
diff --git a/src/node/examples/math_server.js b/src/node/examples/math_server.js
index 3fac193d641..0a86e7eaffb 100644
--- a/src/node/examples/math_server.js
+++ b/src/node/examples/math_server.js
@@ -119,7 +119,7 @@ var server = new Server({
 });
 
 if (require.main === module) {
-  server.bind('0.0.0.0:7070');
+  server.bind('0.0.0.0:50051');
   server.listen();
 }
 
diff --git a/src/node/examples/stock_server.js b/src/node/examples/stock_server.js
index e475c9cb4cc..8c22af147ed 100644
--- a/src/node/examples/stock_server.js
+++ b/src/node/examples/stock_server.js
@@ -83,7 +83,7 @@ var stockServer = new StockServer({
 });
 
 if (require.main === module) {
-  stockServer.bind('0.0.0.0:8080');
+  stockServer.bind('0.0.0.0:50051');
   stockServer.listen();
 }
 
diff --git a/src/node/package.json b/src/node/package.json
index 3f31ba49ffe..d7e9af07bdd 100644
--- a/src/node/package.json
+++ b/src/node/package.json
@@ -1,6 +1,6 @@
 {
   "name": "grpc",
-  "version": "0.8.0",
+  "version": "0.9.0",
   "author": "Google Inc.",
   "description": "gRPC Library for Node",
   "homepage": "http://www.grpc.io/",
diff --git a/src/python/src/setup.py b/src/python/src/setup.py
index e936913cfd0..d0f4791a1e4 100644
--- a/src/python/src/setup.py
+++ b/src/python/src/setup.py
@@ -86,7 +86,7 @@ _PACKAGE_DIRECTORIES = {
 
 setuptools.setup(
     name='grpcio',
-    version='0.5.0a2',
+    version='0.9.0a0',
     ext_modules=[_EXTENSION_MODULE],
     packages=list(_PACKAGES),
     package_dir=_PACKAGE_DIRECTORIES,
diff --git a/src/ruby/.rubocop_todo.yml b/src/ruby/.rubocop_todo.yml
index ed4a4438b3f..c35e970df66 100644
--- a/src/ruby/.rubocop_todo.yml
+++ b/src/ruby/.rubocop_todo.yml
@@ -1,5 +1,5 @@
 # This configuration was generated by `rubocop --auto-gen-config`
-# on 2015-04-17 14:43:27 -0700 using RuboCop version 0.30.0.
+# on 2015-05-22 13:23:34 -0700 using RuboCop version 0.30.1.
 # The point is for the user to remove these configuration records
 # one by one as the offenses are removed from the code base.
 # Note that changes in the inspected code, or installation of new
@@ -7,12 +7,12 @@
 
 # Offense count: 30
 Metrics/AbcSize:
-  Max: 40
+  Max: 38
 
 # Offense count: 3
 # Configuration parameters: CountComments.
 Metrics/ClassLength:
-  Max: 184
+  Max: 192
 
 # Offense count: 35
 # Configuration parameters: CountComments.
diff --git a/src/ruby/ext/grpc/rb_server.c b/src/ruby/ext/grpc/rb_server.c
index 3182d03fab7..837ca3b5e8d 100644
--- a/src/ruby/ext/grpc/rb_server.c
+++ b/src/ruby/ext/grpc/rb_server.c
@@ -282,12 +282,12 @@ static VALUE grpc_rb_server_destroy(VALUE self) {
   call-seq:
     // insecure port
     insecure_server = Server.new(cq, {'arg1': 'value1'})
-    insecure_server.add_http2_port('mydomain:7575')
+    insecure_server.add_http2_port('mydomain:50051')
 
     // secure port
     server_creds = ...
     secure_server = Server.new(cq, {'arg1': 'value1'})
-    secure_server.add_http_port('mydomain:7575', server_creds)
+    secure_server.add_http_port('mydomain:50051', server_creds)
 
     Adds a http2 port to server */
 static VALUE grpc_rb_server_add_http2_port(int argc, VALUE *argv, VALUE self) {
diff --git a/src/ruby/lib/grpc/generic/rpc_server.rb b/src/ruby/lib/grpc/generic/rpc_server.rb
index 665c1444324..dcb11bfbef7 100644
--- a/src/ruby/lib/grpc/generic/rpc_server.rb
+++ b/src/ruby/lib/grpc/generic/rpc_server.rb
@@ -76,7 +76,7 @@ module GRPC
       @jobs = Queue.new
       @size = size
       @stopped = false
-      @stop_mutex = Mutex.new
+      @stop_mutex = Mutex.new # needs to be held when accessing @stopped
       @stop_cond = ConditionVariable.new
       @workers = []
       @keep_alive = keep_alive
@@ -92,10 +92,15 @@ module GRPC
     # @param args the args passed blk when it is called
     # @param blk the block to call
     def schedule(*args, &blk)
-      fail 'already stopped' if @stopped
       return if blk.nil?
-      GRPC.logger.info('schedule another job')
-      @jobs << [blk, args]
+      @stop_mutex.synchronize do
+        if @stopped
+          GRPC.logger.warn('did not schedule job, already stopped')
+          return
+        end
+        GRPC.logger.info('schedule another job')
+        @jobs << [blk, args]
+      end
     end
 
     # Starts running the jobs in the thread pool.
@@ -116,8 +121,8 @@ module GRPC
     def stop
       GRPC.logger.info('stopping, will wait for all the workers to exit')
       @workers.size.times { schedule { throw :exit } }
-      @stopped = true
       @stop_mutex.synchronize do  # wait @keep_alive for works to stop
+        @stopped = true
         @stop_cond.wait(@stop_mutex, @keep_alive) if @workers.size > 0
       end
       forcibly_stop_workers
@@ -249,15 +254,18 @@ module GRPC
                    server_override:nil,
                    connect_md_proc:nil,
                    **kw)
-      @cq = RpcServer.setup_cq(completion_queue_override)
-      @server = RpcServer.setup_srv(server_override, @cq, **kw)
       @connect_md_proc = RpcServer.setup_connect_md_proc(connect_md_proc)
-      @pool_size = pool_size
+      @cq = RpcServer.setup_cq(completion_queue_override)
       @max_waiting_requests = max_waiting_requests
       @poll_period = poll_period
-      @run_mutex = Mutex.new
-      @run_cond = ConditionVariable.new
+      @pool_size = pool_size
       @pool = Pool.new(@pool_size)
+      @run_cond = ConditionVariable.new
+      @run_mutex = Mutex.new
+      @running = false
+      @server = RpcServer.setup_srv(server_override, @cq, **kw)
+      @stopped = false
+      @stop_mutex = Mutex.new
     end
 
     # stops a running server
@@ -266,20 +274,23 @@ module GRPC
     # server's current call loop is it's last.
     def stop
       return unless @running
-      @stopped = true
+      @stop_mutex.synchronize do
+        @stopped = true
+      end
       @pool.stop
+      @server.close
+    end
 
-      # TODO: uncomment this:
-      #
-      # This segfaults in the c layer, so its commented out for now.  Shutdown
-      # still occurs, but the c layer has to do the cleanup.
-      #
-      # @server.close
+    # determines if the server has been stopped
+    def stopped?
+      @stop_mutex.synchronize do
+        return @stopped
+      end
     end
 
     # determines if the server is currently running
     def running?
-      @running ||= false
+      @running
     end
 
     # Is called from other threads to wait for #run to start up the server.
@@ -311,11 +322,6 @@ module GRPC
       t.join
     end
 
-    # Determines if the server is currently stopped
-    def stopped?
-      @stopped ||= false
-    end
-
     # handle registration of classes
     #
     # service is either a class that includes GRPC::GenericService and whose
@@ -407,7 +413,13 @@ module GRPC
       request_call_tag = Object.new
       until stopped?
         deadline = from_relative_time(@poll_period)
-        an_rpc = @server.request_call(@cq, request_call_tag, deadline)
+        begin
+          an_rpc = @server.request_call(@cq, request_call_tag, deadline)
+        rescue Core::CallError, RuntimeError => e
+          # can happen during server shutdown
+          GRPC.logger.warn("server call failed: #{e}")
+          next
+        end
         c = new_active_server_call(an_rpc)
         unless c.nil?
           mth = an_rpc.method.to_sym
diff --git a/src/ruby/lib/grpc/version.rb b/src/ruby/lib/grpc/version.rb
index 072fb9b1aa3..40b6df9a2b6 100644
--- a/src/ruby/lib/grpc/version.rb
+++ b/src/ruby/lib/grpc/version.rb
@@ -29,5 +29,5 @@
 
 # GRPC contains the General RPC module.
 module GRPC
-  VERSION = '0.6.1'
+  VERSION = '0.9.0'
 end
diff --git a/src/ruby/spec/generic/rpc_server_pool_spec.rb b/src/ruby/spec/generic/rpc_server_pool_spec.rb
index aae3a7d7cbf..b67008de486 100644
--- a/src/ruby/spec/generic/rpc_server_pool_spec.rb
+++ b/src/ruby/spec/generic/rpc_server_pool_spec.rb
@@ -74,11 +74,11 @@ describe GRPC::Pool do
   end
 
   describe '#schedule' do
-    it 'throws if the pool is already stopped' do
+    it 'return if the pool is already stopped' do
       p = Pool.new(1)
       p.stop
       job = proc {}
-      expect { p.schedule(&job) }.to raise_error
+      expect { p.schedule(&job) }.to_not raise_error
     end
 
     it 'adds jobs that get run by the pool' do
diff --git a/src/ruby/spec/generic/rpc_server_spec.rb b/src/ruby/spec/generic/rpc_server_spec.rb
index 640b0f656c6..e60a8b27c3f 100644
--- a/src/ruby/spec/generic/rpc_server_spec.rb
+++ b/src/ruby/spec/generic/rpc_server_spec.rb
@@ -212,10 +212,14 @@ describe GRPC::RpcServer do
 
   describe '#stopped?' do
     before(:each) do
-      opts = { a_channel_arg: 'an_arg', poll_period: 1 }
+      opts = { a_channel_arg: 'an_arg', poll_period: 1.5 }
       @srv = RpcServer.new(**opts)
     end
 
+    after(:each) do
+      @srv.stop
+    end
+
     it 'starts out false' do
       expect(@srv.stopped?).to be(false)
     end
@@ -225,7 +229,7 @@ describe GRPC::RpcServer do
       expect(@srv.stopped?).to be(false)
     end
 
-    it 'stays false after the server starts running' do
+    it 'stays false after the server starts running', server: true do
       @srv.handle(EchoService)
       t = Thread.new { @srv.run }
       @srv.wait_till_running
@@ -234,7 +238,7 @@ describe GRPC::RpcServer do
       t.join
     end
 
-    it 'is true after a running server is stopped' do
+    it 'is true after a running server is stopped', server: true do
       @srv.handle(EchoService)
       t = Thread.new { @srv.run }
       @srv.wait_till_running
@@ -251,21 +255,22 @@ describe GRPC::RpcServer do
       expect(r.running?).to be(false)
     end
 
-    it 'is false after run is called with no services registered' do
+    it 'is false if run is called with no services registered', server: true do
       opts = {
         a_channel_arg: 'an_arg',
-        poll_period: 1,
+        poll_period: 2,
         server_override: @server
       }
       r = RpcServer.new(**opts)
       r.run
       expect(r.running?).to be(false)
+      r.stop
     end
 
     it 'is true after run is called with a registered service' do
       opts = {
         a_channel_arg: 'an_arg',
-        poll_period: 1,
+        poll_period: 2.5,
         server_override: @server
       }
       r = RpcServer.new(**opts)
@@ -284,6 +289,10 @@ describe GRPC::RpcServer do
       @srv = RpcServer.new(**@opts)
     end
 
+    after(:each) do
+      @srv.stop
+    end
+
     it 'raises if #run has already been called' do
       @srv.handle(EchoService)
       t = Thread.new { @srv.run }
@@ -335,6 +344,10 @@ describe GRPC::RpcServer do
         @srv = RpcServer.new(**server_opts)
       end
 
+      after(:each) do
+        @srv.stop
+      end
+
       it 'should return NOT_FOUND status on unknown methods', server: true do
         @srv.handle(EchoService)
         t = Thread.new { @srv.run }
@@ -376,7 +389,7 @@ describe GRPC::RpcServer do
         t.join
       end
 
-      it 'should receive metadata when a deadline is specified', server: true do
+      it 'should receive metadata if a deadline is specified', server: true do
         service = SlowService.new
         @srv.handle(service)
         t = Thread.new { @srv.run }
@@ -445,11 +458,11 @@ describe GRPC::RpcServer do
 
       it 'should handle multiple parallel requests', server: true do
         @srv.handle(EchoService)
-        Thread.new { @srv.run }
+        t = Thread.new { @srv.run }
         @srv.wait_till_running
         req, q = EchoMsg.new, Queue.new
         n = 5  # arbitrary
-        threads = []
+        threads = [t]
         n.times do
           threads << Thread.new do
             stub = EchoStub.new(@host, **client_opts)
@@ -472,7 +485,7 @@ describe GRPC::RpcServer do
         }
         alt_srv = RpcServer.new(**opts)
         alt_srv.handle(SlowService)
-        Thread.new { alt_srv.run }
+        t = Thread.new { alt_srv.run }
         alt_srv.wait_till_running
         req = EchoMsg.new
         n = 5  # arbitrary, use as many to ensure the server pool is exceeded
@@ -490,6 +503,7 @@ describe GRPC::RpcServer do
         end
         threads.each(&:join)
         alt_srv.stop
+        t.join
         expect(one_failed_as_unavailable).to be(true)
       end
     end
@@ -513,6 +527,10 @@ describe GRPC::RpcServer do
         @srv = RpcServer.new(**server_opts)
       end
 
+      after(:each) do
+        @srv.stop
+      end
+
       it 'should send connect metadata to the client', server: true do
         service = EchoService.new
         @srv.handle(service)
@@ -545,6 +563,10 @@ describe GRPC::RpcServer do
         @srv = RpcServer.new(**server_opts)
       end
 
+      after(:each) do
+        @srv.stop
+      end
+
       it 'should be added to BadStatus when requests fail', server: true do
         service = FailingService.new
         @srv.handle(service)
diff --git a/templates/Makefile.template b/templates/Makefile.template
index 2da884e262f..bc8f1bb1d07 100644
--- a/templates/Makefile.template
+++ b/templates/Makefile.template
@@ -767,9 +767,20 @@ buildtests_cxx: privatelibs_cxx\
 
 test: test_c test_cxx
 
+flaky_test: flaky_test_c flaky_test_cxx
+
 test_c: buildtests_c
 % for tgt in targets:
-% if tgt.build == 'test' and tgt.get('run', True) and not tgt.language == 'c++':
+% if tgt.build == 'test' and tgt.get('run', True) and not tgt.language == 'c++' and not tgt.get('flaky', False):
+	$(E) "[RUN]     Testing ${tgt.name}"
+	$(Q) $(BINDIR)/$(CONFIG)/${tgt.name} || ( echo test ${tgt.name} failed ; exit 1 )
+% endif
+% endfor
+
+
+flaky_test_c: buildtests_c
+% for tgt in targets:
+% if tgt.build == 'test' and tgt.get('run', True) and not tgt.language == 'c++' and tgt.get('flaky', False):
 	$(E) "[RUN]     Testing ${tgt.name}"
 	$(Q) $(BINDIR)/$(CONFIG)/${tgt.name} || ( echo test ${tgt.name} failed ; exit 1 )
 % endif
@@ -778,7 +789,16 @@ test_c: buildtests_c
 
 test_cxx: buildtests_cxx
 % for tgt in targets:
-% if tgt.build == 'test' and tgt.get('run', True) and tgt.language == 'c++':
+% if tgt.build == 'test' and tgt.get('run', True) and tgt.language == 'c++' and not tgt.get('flaky', False):
+	$(E) "[RUN]     Testing ${tgt.name}"
+	$(Q) $(BINDIR)/$(CONFIG)/${tgt.name} || ( echo test ${tgt.name} failed ; exit 1 )
+% endif
+% endfor
+
+
+flaky_test_cxx: buildtests_cxx
+% for tgt in targets:
+% if tgt.build == 'test' and tgt.get('run', True) and tgt.language == 'c++' and tgt.get('flaky', False):
 	$(E) "[RUN]     Testing ${tgt.name}"
 	$(Q) $(BINDIR)/$(CONFIG)/${tgt.name} || ( echo test ${tgt.name} failed ; exit 1 )
 % endif
diff --git a/test/cpp/interop/interop_client.cc b/test/cpp/interop/interop_client.cc
index 874510e54f7..e3510592468 100644
--- a/test/cpp/interop/interop_client.cc
+++ b/test/cpp/interop/interop_client.cc
@@ -57,8 +57,8 @@ const std::vector<int> response_stream_sizes = {31415, 9, 2653, 58979};
 const int kNumResponseMessages = 2000;
 const int kResponseMessageSize = 1030;
 const int kReceiveDelayMilliSeconds = 20;
-const int kLargeRequestSize = 314159;
-const int kLargeResponseSize = 271812;
+const int kLargeRequestSize = 271828;
+const int kLargeResponseSize = 314159;
 }  // namespace
 
 InteropClient::InteropClient(std::shared_ptr<ChannelInterface> channel)
diff --git a/third_party/protobuf b/third_party/protobuf
index a8b38c598d7..8908cf16fe8 160000
--- a/third_party/protobuf
+++ b/third_party/protobuf
@@ -1 +1 @@
-Subproject commit a8b38c598d7f65b281a72809b28117afdb760931
+Subproject commit 8908cf16fe81f42c766fdf067b1da4554f54ed87
diff --git a/tools/run_tests/run_sanity.sh b/tools/run_tests/run_sanity.sh
index 07e559fb038..003e5255268 100755
--- a/tools/run_tests/run_sanity.sh
+++ b/tools/run_tests/run_sanity.sh
@@ -45,6 +45,6 @@ git submodule > $submodules
 diff -u $submodules - << EOF
  05b155ff59114735ec8cd089f669c4c3d8f59029 third_party/gflags (v2.1.0-45-g05b155f)
  3df69d3aefde7671053d4e3c242b228e5d79c83f third_party/openssl (OpenSSL_1_0_2a)
- a8b38c598d7f65b281a72809b28117afdb760931 third_party/protobuf (v3.0.0-alpha-1-978-ga8b38c5)
+ 8908cf16fe81f42c766fdf067b1da4554f54ed87 third_party/protobuf (v3.0.0-alpha-1-1044-g8908cf1)
  50893291621658f355bc5b4d450a8d06a563053d third_party/zlib (v1.2.8)
 EOF