8 communication resource_error ai_generated true

grpc::RPC_STATUS_RESOURCE_EXCEEDED: Received message larger than max (N vs. M)

ID: communication/grpc-max-message-size-exceeded

Also available as: JSON · Markdown · 中文
85%Fix Rate
88%Confidence
1Evidence
2023-08-10First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
gRPC Go v1.62.0 active — — —
gRPC Python v1.60.0 active — — —
gRPC Java v1.61.0 active — — —

Root Cause

gRPC message size exceeds the configured maximum (default 4 MB), causing server to reject the payload.

generic

中文

gRPC消息大小超过配置的最大值（默认4 MB），导致服务器拒绝该负载。

Official Documentation

https://grpc.io/docs/guides/performance/#message-size

Workarounds

  1. 95% success Increase max message size on both client and server. In Go: server := grpc.NewServer(grpc.MaxRecvMsgSize(50*1024*1024)); conn, _ := grpc.Dial(address, grpc.WithDefaultCallOptions(grpc.MaxCallRecvMsgSize(50*1024*1024))) 
    Increase max message size on both client and server. In Go: server := grpc.NewServer(grpc.MaxRecvMsgSize(50*1024*1024)); conn, _ := grpc.Dial(address, grpc.WithDefaultCallOptions(grpc.MaxCallRecvMsgSize(50*1024*1024)))
  2. 90% success Split large payloads into multiple smaller gRPC messages or use streaming (e.g., server-streaming RPC) to send chunks. 
    Split large payloads into multiple smaller gRPC messages or use streaming (e.g., server-streaming RPC) to send chunks.

中文步骤

  1. Increase max message size on both client and server. In Go: server := grpc.NewServer(grpc.MaxRecvMsgSize(50*1024*1024)); conn, _ := grpc.Dial(address, grpc.WithDefaultCallOptions(grpc.MaxCallRecvMsgSize(50*1024*1024)))
  2. Split large payloads into multiple smaller gRPC messages or use streaming (e.g., server-streaming RPC) to send chunks.

Dead Ends

Common approaches that don't work:

  1. Compress the message with gzip at application level only 50% fail

    gRPC already supports compression; double compression can cause overhead without fixing the size limit if the uncompressed size is checked.

  2. Increase server memory or swap 90% fail

    The error is a hard limit on message size, not a memory shortage; increasing memory does not change the limit.