go network_error ai_generated partial

rpc error: code = Unavailable desc = last resolver error: produced zero addresses

ID: go/grpc-failed-precondition-balancer

Also available as: JSON · Markdown · 中文
80%Fix Rate
83%Confidence
0Evidence
2024-11-11First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
1.x active — — —

Root Cause

The name resolver (DNS or custom) returned an empty address list, often due to a headless service with no ready endpoints, or a malformed target URI.

generic

中文

名称解析器（DNS 或自定义）返回了空地址列表，通常由于没有就绪端点的无头服务，或格式错误的 target URI。

Workarounds

  1. 85% success 
    _, addrs, err := net.DefaultResolver.LookupHost(context.Background(), "myservice.ns.svc.cluster.local")
log.Printf("addrs=%v err=%v", addrs, err)
  2. 75% success 
    conn, err := grpc.NewClient("static:///svc", grpc.WithResolvers(customResolver), grpc.WithTransportCredentials(insecure.NewCredentials()))

Dead Ends

Common approaches that don't work:

  1. 60% fail

    Bypasses resolution but then dials the literal string as an address, which may not be a valid host:port.

  2. 90% fail

    No addresses means every dial fails; retries never produce an address.