go network_error ai_generated true

rpc error: code = Unavailable desc = connection error: desc = "transport: error while dialing: dial tcp 127.0.0.1:8080: connect: connection refused"

ID: go/grpc-unavailable-connection-refused

Also available as: JSON · Markdown · 中文
80%Fix Rate
85%Confidence
0Evidence
2024-01-15First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
1.0 active — — —
1.1 active — — —

Root Cause

gRPC client attempts to connect to a server that is not running or the port is incorrect.

generic

中文

gRPC客户端尝试连接到未运行或端口错误的服务器。

Workarounds

  1. 95% success Ensure the gRPC server is running and accessible at the configured address. 
    Check server health by verifying the process is active and listening on the expected port. Use netstat or lsof to confirm.
  2. 85% success Implement a health check and retry logic with circuit breaker. 
    conn, err := grpc.Dial("localhost:8080", grpc.WithInsecure(), grpc.WithBlock(), grpc.WithDefaultCallOptions(grpc.MaxCallRecvMsgSize(1024*1024*4)))
if err != nil {
    log.Fatalf("did not connect: %v", err)
}
defer conn.Close()

Dead Ends

Common approaches that don't work:

  1. Retry the connection with exponential backoff without checking server status. 90% fail

    If the server is down, retries will keep failing until the server is up. This wastes resources and delays detection.

  2. Increase the dial timeout in client configuration. 80% fail

    A longer timeout does not fix the fundamental issue of server unavailability; it just delays the error.