go network_error ai_generated true

rpc error: code = Unavailable desc = no healthy upstream

ID: go/grpc-unavailable-load-balancer-no-backends

Also available as: JSON · Markdown · 中文
80%Fix Rate
88%Confidence
0Evidence
2024-05-30First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
1.1 active — — —

Root Cause

The load balancer or service mesh cannot find any healthy backend instances to route the request.

generic

中文

负载均衡器或服务网格找不到任何健康的后端实例来路由请求。

Workarounds

  1. 85% success 
    // Configure health checks: grpc.HealthCheck(healthpb.NewHealthClient(conn))
  2. 80% success 
    // Configure destination rules with outlier detection.

Dead Ends

Common approaches that don't work:

  1. 70% fail

    Backends remain unhealthy; client restart doesn't fix server issues.

  2. 60% fail

    New replicas may also fail health checks due to same issue.