{"record":{"id":"5f1db65ed6e244f2","repo":"hashicorp/nomad","slug":"no-path-to-region","errorCode":null,"errorMessage":"No path to region","messagePattern":"No path to region","errorType":"error_code","errorClass":null,"httpStatus":null,"severity":"error","filePath":"nomad/structs/errors.go","lineNumber":55,"sourceCode":"\tErrUnknownDeploymentPrefix = \"Unknown deployment\"\n\n\terrRPCCodedErrorPrefix = \"RPC Error:: \"\n\n\terrDeploymentTerminalNoCancel    = \"can't cancel terminal deployment\"\n\terrDeploymentTerminalNoFail      = \"can't fail terminal deployment\"\n\terrDeploymentTerminalNoPause     = \"can't pause terminal deployment\"\n\terrDeploymentTerminalNoPromote   = \"can't promote terminal deployment\"\n\terrDeploymentTerminalNoResume    = \"can't resume terminal deployment\"\n\terrDeploymentTerminalNoUnblock   = \"can't unblock terminal deployment\"\n\terrDeploymentTerminalNoRun       = \"can't run terminal deployment\"\n\terrDeploymentTerminalNoSetHealth = \"can't set health of allocations for a terminal deployment\"\n\terrDeploymentRunningNoUnblock    = \"can't unblock running deployment\"\n)\n\nvar (\n\tErrNoLeader                   = errors.New(errNoLeader)\n\tErrNotReadyForConsistentReads = errors.New(errNotReadyForConsistentReads)\n\tErrNoRegionPath               = errors.New(errNoRegionPath)\n\tErrTokenNotFound              = errors.New(errTokenNotFound)\n\tErrTokenExpired               = errors.New(errTokenExpired)\n\tErrTokenInvalid               = errors.New(errTokenInvalid)\n\tErrPermissionDenied           = errors.New(errPermissionDenied)\n\tErrJobRegistrationDisabled    = errors.New(errJobRegistrationDisabled)\n\tErrNoNodeConn                 = errors.New(errNoNodeConn)\n\tErrUnknownMethod              = errors.New(errUnknownMethod)\n\tErrUnknownNomadVersion        = errors.New(errUnknownNomadVersion)\n\tErrNodeLacksRpc               = errors.New(errNodeLacksRpc)\n\tErrMissingAllocID             = errors.New(errMissingAllocID)\n\tErrIncompatibleFiltering      = errors.New(errIncompatibleFiltering)\n\tErrMalformedChooseParameter   = errors.New(errMalformedChooseParameter)\n\n\t// ErrResultPaginatorCreation is returned by list RPC handlers when the\n\t// result paginator cannot be built, for example when the server cannot\n\t// evaluate a requested filter expression. api.ResultPaginatorErrorContent\n\t// duplicates its message so the CLI can match it without importing structs.\n\t// Keep the two in sync.","sourceCodeStart":37,"sourceCodeEnd":73,"githubUrl":"https://github.com/hashicorp/nomad/blob/482b49bf1aec006f089bcfc7e632d8f6ac303e5e/nomad/structs/errors.go#L37-L73","documentation":"ErrNoRegionPath is a sentinel (nomad/structs/errors.go:55) returned when an RPC must be routed to a remote region but the server has no known peers (no gossip membership data) for that region (nomad/client_rpc.go:165). Nomad multi-region routing depends on Serf peer caches; without a path, the request cannot be forwarded. The helper structs.IsErrNoRegionPath wraps errors.Is for detection.","triggerScenarios":"A client or server RPC targeting a region (explicit region in request or forwarded cross-region call) where `s.peersCache.RegionPeers(region)` returns nil; agent configured with a region name that doesn't match any server region; forwarding to a region whose servers are down or unreachable.","commonSituations":"Multi-region/multi-datacenter setups where a client's datacenter/region string is misspelled or doesn't match server config; remote region servers offline; WAN connectivity loss between regions; clients pointing at servers that don't serve their region.","solutions":["Verify the client's `region` and `datacenter` config matches the servers' region exactly (e.g. region = \"global\" with region = \"global.eu-west\" servers)","Check that servers in the target region are running and gossip-connected (`nomad server members`); restore connectivity or restart them","Ensure WAN federation is healthy — servers must be members of the same gossip pool for cross-region forwarding","Clients retry registration automatically on this error (client.go:2103 triggers discovery); for interactive calls, retry after servers converge"],"exampleFix":"// before (client.hcl)\nregion = \"prod-eu\" # no such region in cluster\n// after\nregion = \"global\" # matches server region; forwarding path exists","handlingStrategy":"retry","validationCode":"// before cross-region calls, confirm the region is routable\nif members := server.Peers(region); len(members) == 0 {\n    return fmt.Errorf(\"region %q has no reachable servers; check region config and federation\", region)\n}","typeGuard":"func isNoRegionPath(err error) bool {\n    return structs.IsErrNoRegionPath(err)\n}","tryCatchPattern":"err := forwardToRegion(req)\nif structs.IsErrNoRegionPath(err) {\n    logger.Debug(\"no path to region; will retry after servers converge\")\n    time.Sleep(registerRetryIntv)\n    return forwardToRegion(req)\n}","preventionTips":["Keep client `region` values identical to server region configuration; avoid typos","Monitor gossip membership per region; alert when a region drops to zero members","Validate WAN federation health after network changes (`nomad server members` across regions)"],"tags":["nomad","networking","multi-region","routing","federation"],"backgroundTag":"no-path-to-region","analyzedSha":"482b49bf1aec006f089bcfc7e632d8f6ac303e5e","analyzedAt":"2026-09-04T07:54:14.808Z","contentChangedAt":"2026-09-04T07:54:14.808Z","schemaVersion":2},"datasetVersion":"2026-09-08T10:18:20.063Z"}