{"record":{"id":"7fcdcae89a98abe6","repo":"hashicorp/nomad","slug":"updating-alloc-failed-v","errorCode":null,"errorMessage":"updating alloc failed: %v","messagePattern":"updating alloc failed: (.+?)","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"nomad/state/state_store.go","lineNumber":4055,"sourceCode":"\tdefer txn.Abort()\n\n\tallocs := req.Alloc\n\tevals := req.Evals\n\n\t// Capture all nodes being affected. Alloc updates from clients are batched\n\t// so this request may include allocs from several nodes.\n\tnodeIDs := set.New[string](1)\n\tpopulatedAllocs := []*structs.Allocation{}\n\t// Handle each of the updated allocations\n\tfor _, a := range allocs {\n\t\tnodeIDs.Insert(a.NodeID)\n\t\tca, err := s.nestedUpdateAllocFromClient(txn, index, a)\n\t\tif ca == nil {\n\t\t\tcontinue\n\t\t}\n\n\t\tif err != nil {\n\t\t\treturn fmt.Errorf(\"updating alloc failed: %v\", err)\n\t\t}\n\t\tpopulatedAllocs = append(populatedAllocs, ca)\n\t}\n\n\tif len(req.Evals) > 0 {\n\t\terr := s.UpsertEvalsTxn(index, evals, txn)\n\t\tif err != nil {\n\t\t\treturn fmt.Errorf(\"upserting evals failed: %v\", err)\n\t\t}\n\t}\n\n\tjobs := map[structs.NamespacedID]string{}\n\n\tfor _, alloc := range populatedAllocs {\n\t\ttuple := structs.NamespacedID{\n\t\t\tID:        alloc.JobID,\n\t\t\tNamespace: alloc.Namespace,\n\t\t}","sourceCodeStart":4037,"sourceCodeEnd":4073,"githubUrl":"https://github.com/hashicorp/nomad/blob/482b49bf1aec006f089bcfc7e632d8f6ac303e5e/nomad/state/state_store.go#L4037-L4073","documentation":"Thrown by UpsertAllocsUpdatedAllocs-style client alloc update handling when nestedUpdateAllocFromClient returns an error while reconciling allocations submitted by a node. It wraps whatever failed inside the nested update (alloc lookup, job/task re-population, terminal handling) and aborts the whole alloc-update transaction.","triggerScenarios":"A Nomad client sends Node.UpdateAllocs / batch alloc updates and the nested per-alloc update inside the txn fails (e.g. wrapped 'alloc lookup failed' or internal state errors).","commonSituations":"Client alloc updates failing on servers with unhealthy state stores; visible as repeated failed alloc update RPCs in server logs after upgrades or corruption.","solutions":["Unwrap the '%v' cause — commonly the nested alloc-lookup error — to find the root failure.","Check server state store health (logs, disk, BoltDB).","Restart the affected server; if leader, verify Raft health.","Retry the client alloc update after the server recovers; clients re-submit alloc state periodically."],"exampleFix":null,"handlingStrategy":"retry","validationCode":"// Confirm server is healthy before re-driving alloc updates:\n// GET /v1/agent/health and check leader presence before retry.","typeGuard":null,"tryCatchPattern":"// Nomad clients auto-resubmit alloc updates; for direct RPC users:\nif strings.Contains(err.Error(), \"updating alloc failed\") {\n  time.Sleep(backoff)\n  retryUpdateAllocs(req) // after verifying server recovery\n}","preventionTips":["Let Nomad clients re-drive alloc state rather than manual resubmission.","Keep the server quorum healthy (3 or 5 servers).","Monitor disk and memory on servers.","Alert on wrapped 'updating alloc failed' occurrences."],"tags":["nomad","state-store","alloc-update"],"backgroundTag":"alloc-update-failed","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"}