{"record":{"id":"dcfca9570c18469f","repo":"benbjohnson/litestream","slug":"close-ltx-encoder-w","errorCode":null,"errorMessage":"close ltx encoder: %w","messagePattern":"close ltx encoder: %w","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"db.go","lineNumber":2206,"sourceCode":"\t\t\t})\n\t\tif err := db.writeLTXFromWAL(ctx, enc, walFile, info.prevCommit, commit, pageMap); err != nil {\n\t\t\tif isDiskFullError(err) {\n\t\t\t\treturn result, NewLTXError(\"stage-write\", tmpFilename, 0, uint64(txID), uint64(txID), fmt.Errorf(\"%w: %w\", ErrDiskFull, err))\n\t\t\t}\n\t\t\treturn result, fmt.Errorf(\"write ltx from wal: %w\", err)\n\t\t}\n\t}\n\n\t// Encode final trailer to the end of the LTX file.\n\tdb.setSyncDiagPhase(diagPhaseCloseLTX, func(s *diagState) {\n\t\ts.txID = txID\n\t\ts.walSize = sz\n\t})\n\tif err := enc.Close(); err != nil {\n\t\tif isDiskFullError(err) {\n\t\t\treturn result, NewLTXError(\"stage-write\", tmpFilename, 0, uint64(txID), uint64(txID), fmt.Errorf(\"%w: %w\", ErrDiskFull, err))\n\t\t}\n\t\treturn result, fmt.Errorf(\"close ltx encoder: %w\", err)\n\t}\n\n\t// Sync & close LTX file.\n\tdb.setSyncDiagPhase(diagPhaseFsyncLTX, func(s *diagState) {\n\t\ts.txID = txID\n\t\ts.walSize = sz\n\t})\n\tif err := ltxFile.Sync(); err != nil {\n\t\tif isDiskFullError(err) {\n\t\t\treturn result, NewLTXError(\"stage-sync\", tmpFilename, 0, uint64(txID), uint64(txID), fmt.Errorf(\"%w: %w\", ErrDiskFull, err))\n\t\t}\n\t\treturn result, fmt.Errorf(\"sync ltx file: %w\", err)\n\t}\n\tif err := ltxFile.Close(); err != nil {\n\t\tif isDiskFullError(err) {\n\t\t\treturn result, NewLTXError(\"stage-close\", tmpFilename, 0, uint64(txID), uint64(txID), fmt.Errorf(\"%w: %w\", ErrDiskFull, err))\n\t\t}\n\t\treturn result, fmt.Errorf(\"close ltx file: %w\", err)","sourceCodeStart":2188,"sourceCodeEnd":2224,"githubUrl":"https://github.com/benbjohnson/litestream/blob/4ed7a308f6271ebfd2b0a6e4b70b03011a37e4a3/db.go#L2188-L2224","documentation":"The LTX encoder failed to close for a non-disk-full reason. enc.Close() flushes buffered page data and writes the LTX trailer with checksums; an I/O or encoding failure here means the staged LTX is incomplete and unusable, so the temp file is removed and the transaction not replicated.","triggerScenarios":"Flush/trailer write I/O error on the temp file (bad block, fd invalidated mid-write, storage error), or an internal ltx encoder state error (e.g. encode called on a writer that already failed).","commonSituations":"Failing or flaky storage on the staging volume; container storage-layer errors; NFS interruptions; a previously swallowed write error surfacing at Close flush time.","solutions":["Check dmesg/journalctl for block-device errors; run fsck or migrate off failing hardware.","Move the staging/data directory to reliable local disk (avoid NFS for litestream state).","Retry replication; transient flush failures usually clear on the next sync.","Use `litestream reset` if the database's local LTX state is corrupted after repeated failures.","Keep litestream and its ltx dependency versions matched (rebuild from a single release)."],"exampleFix":null,"handlingStrategy":"try-catch","validationCode":"// preflight storage reliability check on staging volume:\n// dmesg | grep -iE 'i/o error|blk_update' || echo \"storage clean\"","typeGuard":null,"tryCatchPattern":"if err != nil && strings.Contains(err.Error(), \"close ltx encoder\") {\n    log.Printf(\"LTX finalize failed (flush/trailer): %v — staged file discarded, next sync retries\", err)\n    if recurring(err) { /* litestream reset */ }\n}","preventionTips":["Use reliable local disk for litestream state (avoid NFS)","Monitor storage errors via SMART/dmesg","Keep litestream and ltx dependency versions aligned","Treat repeated close failures as a reset+resnapshot trigger"],"tags":["ltx","flush","io-error","replication"],"backgroundTag":"file-write-failed","analyzedSha":"4ed7a308f6271ebfd2b0a6e4b70b03011a37e4a3","analyzedAt":"2026-09-06T18:29:25.564Z","contentChangedAt":"2026-09-06T18:29:25.564Z","schemaVersion":2},"datasetVersion":"2026-09-14T05:17:10.506Z"}