go network_error ai_generated true

rpc错误：代码=不可用 描述=所有子连接均处于瞬态故障状态

rpc error: code = Unavailable desc = all SubConns are in TransientFailure

ID: go/grpc-unavailable-load-balancer

其他格式: JSON · Markdown 中文 · English
80%修复率
87%置信度
0证据数
2024-08-10首次发现

版本兼容性

版本状态引入弃用备注
1.21 active — — —
1.22 active — — —

根因分析

gRPC客户端的负载均衡器无法连接到任何后端服务器，因为所有端点都不可达或健康检查失败。

English

The gRPC client's load balancer cannot connect to any backend server because all endpoints are unreachable or failing health checks.

generic

解决方案

  1. 85% 成功率 Verify server health and restart any down instances. 
    // Check server status via health check endpoint
healthClient := grpc_health_v1.NewHealthClient(conn)
resp, err := healthClient.Check(ctx, &grpc_health_v1.HealthCheckRequest{Service: "myservice.MyService"})
  2. 90% 成功率 Use a different load balancing policy like round_robin with proper service discovery. 
    conn, _ := grpc.Dial("dns:///myservice:50051", grpc.WithDefaultServiceConfig(`{"loadBalancingPolicy":"round_robin"}`))

无效尝试

常见但无效的做法:

  1. Recreating the client without changing server addresses. 90% 失败

    Same endpoints, same connectivity issue.

  2. Setting a shorter dial timeout. 80% 失败

    Timeouts don't fix unreachable servers.