{"record":{"id":"6685f953d6d0fbbf","repo":"hashicorp/nomad","slug":"failed-updating-variable-index-s","errorCode":null,"errorMessage":"failed updating variable index: %s","messagePattern":"failed updating variable index: (.+?)","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"nomad/state/state_store_variables.go","lineNumber":294,"sourceCode":"\n\terr = s.enforceVariablesQuota(idx, tx, sv.Namespace, quotaChange)\n\tif err != nil {\n\t\treturn req.ErrorResponse(idx, err)\n\t}\n\n\t// we check enforcement above even if there's no change because another\n\t// namespace may have used up quota to make this no longer valid, but we\n\t// only update the table if this namespace has changed\n\tif quotaChange != 0 {\n\t\tquotaUsed.ModifyIndex = idx\n\t\tif err := tx.Insert(TableVariablesQuotas, quotaUsed); err != nil {\n\t\t\treturn req.ErrorResponse(idx, fmt.Errorf(\"variable quota insert failed: %v\", err))\n\t\t}\n\t}\n\n\tif err := tx.Insert(tableIndex,\n\t\t&IndexEntry{TableVariables, idx}); err != nil {\n\t\treturn req.ErrorResponse(idx, fmt.Errorf(\"failed updating variable index: %s\", err))\n\t}\n\n\treturn req.SuccessResponse(idx, &sv.VariableMetadata)\n}\n\n// VarDelete is used to delete a single variable in the\n// the state store.\nfunc (s *StateStore) VarDelete(msgType structs.MessageType, idx uint64, req *structs.VarApplyStateRequest) *structs.VarApplyStateResponse {\n\ttx := s.db.WriteTxnMsgT(msgType, idx)\n\tdefer tx.Abort()\n\n\t// Perform the actual delete\n\tresp := s.svDeleteTxn(tx, idx, req)\n\tif !resp.IsOk() {\n\t\treturn resp\n\t}\n\n\terr := tx.Commit()","sourceCodeStart":276,"sourceCodeEnd":312,"githubUrl":"https://github.com/hashicorp/nomad/blob/482b49bf1aec006f089bcfc7e632d8f6ac303e5e/nomad/state/state_store_variables.go#L276-L312","documentation":"Returned by varSetTxn after the variable and quota rows are written, when updating the TableVariables index entry (IndexEntry for TableVariables) via tx.Insert fails. The index tracks the latest ModifyIndex for the variables table; failing this aborts the whole variable write with an ErrorResponse. It wraps the underlying memdb error.","triggerScenarios":"Any successful VarSet / varSetCASTxn / VarLockAcquire path reaching the final index update where tx.Insert(tableIndex, &IndexEntry{TableVariables, idx}) errors — usually an aborted transaction or internal memdb failure.","commonSituations":"Long-running write transaction hitting a timeout or abort; corrupted index table; concurrent txn misuse in custom code reusing the store.","solutions":["Read the wrapped %s error to determine the memdb cause","Retry the variable write; the aborted txn left the store unchanged","Check/restore state store integrity if the error persists","Report/upgrade if it's a known memdb issue"],"exampleFix":"// before\nreturn req.ErrorResponse(idx, fmt.Errorf(\"failed updating variable index: %s\", err))\n// after\nreturn req.ErrorResponse(idx, fmt.Errorf(\"failed updating variable index: %w\", err))","handlingStrategy":"retry","validationCode":null,"typeGuard":null,"tryCatchPattern":"if err != nil && strings.Contains(err.Error(), \"failed updating variable index\") {\n    // whole write aborted; safe to retry\n    return backoff.Retry(writeFn, backoff.WithMaxRetries(3))\n}","preventionTips":["Retry variable writes with backoff on transient errors","Monitor Nomad server logs for memdb errors","Keep Nomad up to date for memdb fixes"],"tags":["nomad","state-store","memdb","index"],"backgroundTag":"memdb-insert-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"}