go network_error ai_generated true

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

ID: go/grpc-code-unavailable-lb-policy

Also available as: JSON · Markdown · 中文
80%Fix Rate
85%Confidence
0Evidence
2024-11-07First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
1.50+ active — — —

Root Cause

The name resolver returned no addresses. Common with DNS-based targets (dns:///) when the hostname doesn't resolve, or with custom resolvers returning empty updates.

generic

中文

名称解析器返回了零个地址。常见于基于 DNS 的目标（dns:///）主机名无法解析，或自定义解析器返回空更新。

Workarounds

  1. 85% success 
    Verify the target scheme and hostname resolve. Use passthrough for a literal address:
conn, _ := grpc.NewClient("passthrough:///10.0.0.5:50051", grpc.WithTransportCredentials(insecure.NewCredentials()))
Or fix DNS: `nslookup myservice.default.svc.cluster.local`
  2. 80% success 
    Register a custom resolver that logs address updates:
resolver.Register(&myResolver{})

Dead Ends

Common approaches that don't work:

  1. 70% fail

    Bypasses load balancing and breaks TLS SNI/hostname verification.

  2. 90% fail

    No addresses will ever appear if DNS is broken; waiting longer doesn't help.