{"record":{"id":"1b1e9dc06ab1b3fc","repo":"VictoriaMetrics/VictoriaMetrics","slug":"cannot-obtain-the-next-block-to-search-in-the-tabl","errorCode":null,"errorMessage":"cannot obtain the next block to search in the table: %w","messagePattern":"cannot obtain the next block to search in the table: %w","errorType":"error_code","errorClass":null,"httpStatus":null,"severity":"error","filePath":"lib/storage/table_search.go","lineNumber":132,"sourceCode":"}\n\n// NextBlock advances to the next block.\n//\n// The blocks are sorted by (TSID, MinTimestamp). Two subsequent blocks\n// for the same TSID may contain overlapped time ranges.\nfunc (ts *tableSearch) NextBlock() bool {\n\tif ts.err != nil {\n\t\treturn false\n\t}\n\tif ts.nextBlockNoop {\n\t\tts.nextBlockNoop = false\n\t\treturn true\n\t}\n\n\tts.err = ts.nextBlock()\n\tif ts.err != nil {\n\t\tif ts.err != io.EOF {\n\t\t\tts.err = fmt.Errorf(\"cannot obtain the next block to search in the table: %w\", ts.err)\n\t\t}\n\t\treturn false\n\t}\n\treturn true\n}\n\nfunc (ts *tableSearch) nextBlock() error {\n\tptsMin := ts.ptsHeap[0]\n\tif ptsMin.NextBlock() {\n\t\theap.Fix(&ts.ptsHeap, 0)\n\t\tts.BlockRef = ts.ptsHeap[0].BlockRef\n\t\treturn nil\n\t}\n\n\tif err := ptsMin.Error(); err != nil {\n\t\treturn err\n\t}\n","sourceCodeStart":114,"sourceCodeEnd":150,"githubUrl":"https://github.com/VictoriaMetrics/VictoriaMetrics/blob/5079fb58f1e8e62113f90c945ad71586c797d770/lib/storage/table_search.go#L114-L150","documentation":"TableSearch.NextBlock advances the search to the next block. When the internal nextBlock() returns an error other than io.EOF, it is stored in ts.err and wrapped with this message; io.EOF is kept unwrapped as the normal end-of-stream signal. Callers should check ts.err after NextBlock returns false.","triggerScenarios":"Iterating a TableSearch (NextBlock in a loop via NextMetricBlock) when the underlying partition search hits an unexpected error mid-iteration — I/O failure or corrupted block data — rather than a clean EOF.","commonSituations":"Long queries interrupted by disk errors; corrupted compressed blocks in a partition after a crash; storage files removed or truncated while a query is running.","solutions":["Check ts.err and confirm it is not io.EOF; inspect the wrapped cause.","Verify storage health (disk errors, free space) and file integrity.","Restore/rebuild the affected partition from backup or a repair process.","Re-run the query after fixing the underlying storage problem."],"exampleFix":"// before\nfor ts.NextBlock() {\n    process(ts.Block)\n}\n// no check for ts.err — real failures look like normal end of iteration\n// after\nfor ts.NextBlock() {\n    process(ts.Block)\n}\nif ts.err != nil && ts.err != io.EOF {\n    return fmt.Errorf(\"search failed: %w\", ts.err)\n}","handlingStrategy":"try-catch","validationCode":null,"typeGuard":"func searchFailed(ts *storage.TableSearch) bool {\n    err := ts.Err()\n    return err != nil && !errors.Is(err, io.EOF)\n}","tryCatchPattern":"for ts.NextBlock() {\n    process(ts.Block)\n}\nif err := ts.Err(); err != nil && !errors.Is(err, io.EOF) {\n    return fmt.Errorf(\"query aborted: %w\", err)\n}","preventionTips":["Always check ts.Err() after iteration, not just loop exit","Treat non-EOF errors as storage-level failures worth alerting on","Keep disks healthy; watch kernel logs for I/O errors","Pin the same library version for writer and reader processes"],"tags":["storage","search","io-error","victoriametrics"],"backgroundTag":"table-search-iteration-error","analyzedSha":"5079fb58f1e8e62113f90c945ad71586c797d770","analyzedAt":"2026-09-03T18:10:26.153Z","contentChangedAt":"2026-09-03T18:10:26.153Z","schemaVersion":2},"datasetVersion":"2026-09-08T15:18:49.778Z"}