Use old ordering logic for message size limit source

src/core/ext/filters/message_size/message_size_filter.cc

@@ -117,17 +117,38 @@ void MessageSizeParser::Register() {
 
 size_t MessageSizeParser::ParserIndex() { return g_message_size_parser_index; }
 
+namespace {
+const grpc_arg* ChannelArgsFindLast(const grpc_channel_args* args,
+                                    const char* name) {
+  grpc_arg* arg = nullptr;
+  if (args != nullptr) {
+    for (size_t i = 0; i < args->num_args; ++i) {
+      if (strcmp(args->args[i].key, name) == 0) {
+        arg = &args->args[i];
+      }
+    }
+  }
+  return arg;
+}
+}  // namespace
+
 int GetMaxRecvSizeFromChannelArgs(const grpc_channel_args* args) {
   if (grpc_channel_args_want_minimal_stack(args)) return -1;
-  return grpc_channel_args_find_integer(
-      args, GRPC_ARG_MAX_RECEIVE_MESSAGE_LENGTH,
+  // We are not using grpc_channel_args_find_integer here because of ordering
+  // issues. The logic below maintains existing behavior by choosing the last
+  // matching channel argument instead of the first.
+  return grpc_channel_arg_get_integer(
+      ChannelArgsFindLast(args, GRPC_ARG_MAX_RECEIVE_MESSAGE_LENGTH),
       {GRPC_DEFAULT_MAX_RECV_MESSAGE_LENGTH, -1, INT_MAX});
 }
 
 int GetMaxSendSizeFromChannelArgs(const grpc_channel_args* args) {
   if (grpc_channel_args_want_minimal_stack(args)) return -1;
-  return grpc_channel_args_find_integer(
-      args, GRPC_ARG_MAX_SEND_MESSAGE_LENGTH,
+  // We are not using grpc_channel_args_find_integer here because of ordering
+  // issues. The logic below maintains existing behavior by choosing the last
+  // matching channel argument instead of the first.
+  return grpc_channel_arg_get_integer(
+      ChannelArgsFindLast(args, GRPC_ARG_MAX_SEND_MESSAGE_LENGTH),
       {GRPC_DEFAULT_MAX_SEND_MESSAGE_LENGTH, -1, INT_MAX});
 }