Fix grpclb code.

src/core/ext/lb_policy/grpclb/grpclb.c

@@ -818,9 +818,15 @@ static grpc_lb_policy *glb_create(grpc_exec_ctx *exec_ctx,
    * We need the LB channel to return addresses with is_balancer=false
    * so that it does not wind up recursively using the grpclb LB policy,
    * as per the special case logic in client_channel.c.
+   *
+   * Finally, we also strip out the channel arg for the server URI,
+   * since that will be different for the LB channel than for the parent
+   * channel.  (The client channel factory will re-add this arg with
+   * the right value.)
    */
   static const char *keys_to_remove[] = {GRPC_ARG_LB_POLICY_NAME,
-                                         GRPC_ARG_LB_ADDRESSES};
+                                         GRPC_ARG_LB_ADDRESSES,
+                                         GRPC_ARG_SERVER_URI};
   grpc_channel_args *new_args = grpc_channel_args_copy_and_remove(
       args->args, keys_to_remove, GPR_ARRAY_SIZE(keys_to_remove));
   glb_policy->lb_channel = grpc_client_channel_factory_create_channel(

src/core/ext/transport/chttp2/client/insecure/channel_create.c

@@ -65,7 +65,16 @@ static grpc_channel *client_channel_factory_create_channel(
     grpc_exec_ctx *exec_ctx, grpc_client_channel_factory *cc_factory,
     const char *target, grpc_client_channel_type type,
     const grpc_channel_args *args) {
-  return grpc_channel_create(exec_ctx, target, args, GRPC_CLIENT_CHANNEL, NULL);
+  // Add channel arg containing the server URI.
+  grpc_arg arg;
+  arg.type = GRPC_ARG_STRING;
+  arg.key = GRPC_ARG_SERVER_URI;
+  arg.value.string = (char *)target;
+  grpc_channel_args *new_args = grpc_channel_args_copy_and_add(args, &arg, 1);
+  grpc_channel *channel = grpc_channel_create(exec_ctx, target, new_args,
+                                              GRPC_CLIENT_CHANNEL, NULL);
+  grpc_channel_args_destroy(new_args);
+  return channel;
 }
 
 static const grpc_client_channel_factory_vtable client_channel_factory_vtable =
@@ -90,19 +99,14 @@ grpc_channel *grpc_insecure_channel_create(const char *target,
   GPR_ASSERT(reserved == NULL);
   grpc_client_channel_factory *factory =
       (grpc_client_channel_factory *)&client_channel_factory;
-  // Add channel args containing the server name and client channel factory.
-  grpc_arg new_args[2];
-  new_args[0].type = GRPC_ARG_STRING;
-  new_args[0].key = GRPC_ARG_SERVER_URI;
-  new_args[0].value.string = (char *)target;
-  new_args[1] = grpc_client_channel_factory_create_channel_arg(factory);
-  grpc_channel_args *args_copy =
-      grpc_channel_args_copy_and_add(args, new_args, GPR_ARRAY_SIZE(new_args));
+  // Add channel arg containing the client channel factory.
+  grpc_arg arg = grpc_client_channel_factory_create_channel_arg(factory);
+  grpc_channel_args *new_args = grpc_channel_args_copy_and_add(args, &arg, 1);
   // Create channel.
   grpc_channel *channel = client_channel_factory_create_channel(
-      &exec_ctx, factory, target, GRPC_CLIENT_CHANNEL_TYPE_REGULAR, args_copy);
+      &exec_ctx, factory, target, GRPC_CLIENT_CHANNEL_TYPE_REGULAR, new_args);
   // Clean up.
-  grpc_channel_args_destroy(args_copy);
+  grpc_channel_args_destroy(new_args);
   grpc_client_channel_factory_unref(&exec_ctx, factory);
   grpc_exec_ctx_finish(&exec_ctx);
   return channel != NULL ? channel : grpc_lame_client_channel_create(

src/core/ext/transport/chttp2/client/secure/secure_channel_create.c

@@ -89,7 +89,16 @@ static grpc_channel *client_channel_factory_create_channel(
     grpc_exec_ctx *exec_ctx, grpc_client_channel_factory *cc_factory,
     const char *target, grpc_client_channel_type type,
     const grpc_channel_args *args) {
-  return grpc_channel_create(exec_ctx, target, args, GRPC_CLIENT_CHANNEL, NULL);
+  // Add channel arg containing the server URI.
+  grpc_arg arg;
+  arg.type = GRPC_ARG_STRING;
+  arg.key = GRPC_ARG_SERVER_URI;
+  arg.value.string = (char *)target;
+  grpc_channel_args *new_args = grpc_channel_args_copy_and_add(args, &arg, 1);
+  grpc_channel *channel = grpc_channel_create(exec_ctx, target, new_args,
+                                              GRPC_CLIENT_CHANNEL, NULL);
+  grpc_channel_args_destroy(new_args);
+  return channel;
 }
 
 static const grpc_client_channel_factory_vtable client_channel_factory_vtable =
@@ -137,14 +146,11 @@ grpc_channel *grpc_secure_channel_create(grpc_channel_credentials *creds,
   GRPC_SECURITY_CONNECTOR_REF(&security_connector->base,
                               "grpc_secure_channel_create");
   f->security_connector = security_connector;
-  // Add channel args containing the server name, client channel
-  // factory, and security connector.
-  grpc_arg new_args[3];
-  new_args[0].type = GRPC_ARG_STRING;
-  new_args[0].key = GRPC_ARG_SERVER_URI;
-  new_args[0].value.string = (char *)target;
-  new_args[1] = grpc_client_channel_factory_create_channel_arg(&f->base);
-  new_args[2] = grpc_security_connector_to_arg(&security_connector->base);
+  // Add channel args containing the client channel factory and security
+  // connector.
+  grpc_arg new_args[2];
+  new_args[0] = grpc_client_channel_factory_create_channel_arg(&f->base);
+  new_args[1] = grpc_security_connector_to_arg(&security_connector->base);
   grpc_channel_args *args_copy = grpc_channel_args_copy_and_add(
       new_args_from_connector != NULL ? new_args_from_connector : args,
       new_args, GPR_ARRAY_SIZE(new_args));