{"record":{"id":"e00e84a81da6d802","repo":"micro/go-micro","slug":"failed-to-register-service","errorCode":null,"errorMessage":"failed to register service","messagePattern":"failed to register service","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"server/rpc_server.go","lineNumber":404,"sourceCode":"\t}\n\n\ts.handlers[h.Name()] = h\n\n\treturn nil\n}\n\nfunc (s *rpcServer) Register() error {\n\tconfig := s.Options()\n\tlogger := config.Logger\n\n\t// Registry function used to register the service\n\tregFunc := s.newRegFuc(config)\n\n\t// Directly register if service was cached\n\trsvc := s.getCachedService()\n\tif rsvc != nil {\n\t\tif err := regFunc(rsvc); err != nil {\n\t\t\treturn errors.Wrap(err, \"failed to register service\")\n\t\t}\n\n\t\treturn nil\n\t}\n\n\t// Only cache service if host IP valid\n\taddr, cacheService, err := s.getAddr(config)\n\tif err != nil {\n\t\treturn err\n\t}\n\n\tnode := &registry.Node{\n\t\t// TODO: node id should be set better. Add native option to specify\n\t\t// host id through either config or ENV. Also look at logging of name.\n\t\tId:       config.Name + \"-\" + config.Id,\n\t\tAddress:  addr,\n\t\tMetadata: s.newNodeMetedata(config),\n\t}","sourceCodeStart":386,"sourceCodeEnd":422,"githubUrl":"https://github.com/micro/go-micro/blob/24529f140421a11a33b6999ab7944f2021cfd69c/server/rpc_server.go#L386-L422","documentation":"This error is wrapped by server.Register in server/rpc_server.go when the framework's cached service registration function fails. Register is called during server Start (and by the registrar loop) to publish the service node to the configured registry. The wrapped cause is whatever the registry backend (etcd, mdns, consul, etc.) returned, so the real reason is in the error chain.","triggerScenarios":"server.Register() invokes regFunc(rsvc) on a service returned from getCachedService(); the registry's Register call fails (backend unreachable, auth rejected, node invalid). Any caller of Start or the registrar loop that hits the cached-service path can surface this.","commonSituations":"Registry server (etcd/consul) not running or wrong registry address in config; missing registry credentials/TLS settings; network partition between the service and the registry; mdns failing in containerized environments without multicast.","solutions":["Check the wrapped cause in the error chain (%+v with stack) to see the registry-specific failure","Verify the registry backend is reachable at the configured address (curl/ping etcd or consul endpoint)","Fix registry options (addresses, auth, TLS) passed to micro.New(registry.Registry(...))","Ensure the service host/IP is resolvable and the node ID is not conflicting; retry Start after the registry recovers"],"exampleFix":"// before\nmicro.New(micro.Registry(registry.Registry(etcd))) // etcd not configured\n// after\nmicro.New(micro.Registry(registry.NewRegistry(registry.Addrs(\"etcd:2379\"))))","handlingStrategy":"retry","validationCode":"// before starting the server\nreg := registry.NewRegistry(registry.Addrs(\"etcd:2379\"))\nif _, err := reg.ListServices(); err != nil {\n    return fmt.Errorf(\"registry unreachable: %w\", err)\n}","typeGuard":null,"tryCatchPattern":"if err := srv.Start(); err != nil {\n    var cause error\n    errors.As(err, &cause) // unwrap registry cause\n    log.Printf(\"register failed: %+v\", err)\n    // retry with backoff\n    time.Sleep(backoff)\n    err = srv.Start()\n}","preventionTips":["Health-check the registry before calling Start","Configure registry addresses/credentials explicitly, not defaults","Run a registrar retry loop so transient registry outages self-heal","Ensure node IDs and host IPs are valid and unique"],"tags":["registry","service-discovery","startup"],"backgroundTag":"registry-registration-failed","analyzedSha":"24529f140421a11a33b6999ab7944f2021cfd69c","analyzedAt":"2026-09-01T02:52:24.923Z","contentChangedAt":null,"schemaVersion":2},"datasetVersion":"2026-09-08T05:18:18.240Z"}