{"record":{"id":"7fd1e160a29b63e2","repo":"benbjohnson/litestream","slug":"iterate-remote-files-w","errorCode":null,"errorMessage":"iterate remote files: %w","messagePattern":"iterate remote files: %w","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"vfs.go","lineNumber":2080,"sourceCode":"// checkForConflict checks if the remote has newer transactions than expected.\n// Must be called with f.mu held.\nfunc (f *VFSFile) checkForConflict(ctx context.Context) error {\n\t// Get latest remote position\n\titr, err := f.client.LTXFiles(ctx, 0, f.expectedTXID, false)\n\tif err != nil {\n\t\treturn fmt.Errorf(\"check remote position: %w\", err)\n\t}\n\tdefer itr.Close()\n\n\tvar remoteTXID ltx.TXID\n\tfor itr.Next() {\n\t\tinfo := itr.Item()\n\t\tif info.MaxTXID > remoteTXID {\n\t\t\tremoteTXID = info.MaxTXID\n\t\t}\n\t}\n\tif err := itr.Close(); err != nil {\n\t\treturn fmt.Errorf(\"iterate remote files: %w\", err)\n\t}\n\n\t// If remote has advanced beyond our expected position, we have a conflict\n\tif remoteTXID > f.expectedTXID {\n\t\tf.logger.Warn(\"conflict detected\",\n\t\t\t\"expected\", f.expectedTXID,\n\t\t\t\"remote\", remoteTXID)\n\t\treturn fmt.Errorf(\"%w: expected TXID %d but remote has %d\",\n\t\t\tErrConflict, f.expectedTXID, remoteTXID)\n\t}\n\n\treturn nil\n}\n\n// createLTXFromDirty creates an LTX file from dirty pages.\n// Returns a streaming reader for the LTX data using io.Pipe to avoid loading\n// all data into memory at once.\n// Must be called with f.mu held.","sourceCodeStart":2062,"sourceCodeEnd":2098,"githubUrl":"https://github.com/benbjohnson/litestream/blob/4ed7a308f6271ebfd2b0a6e4b70b03011a37e4a3/vfs.go#L2062-L2098","documentation":"After enumerating remote LTX files to compute the remote position, the iterator must be closed; closing can flush/propagate backend errors (e.g. a failed final listing page or checksum error). This error wraps itr.Close() failure from the conflict check, so sync is aborted even though enumeration appeared to succeed.","triggerScenarios":"itr.Close() on the LTX file iterator returns an error — typically the underlying object-store listing failed partway (truncated response, connection reset) and the error surfaces on Close.","commonSituations":"Connection resets to S3-compatible endpoints mid-listing; proxies cutting long-lived responses; provider inconsistencies during bucket failover; buggy S3 gateways (MinIO) returning malformed truncated listings.","solutions":["Retry the sync; if the error is transient the next LTXFiles listing usually succeeds.","Inspect the wrapped error for HTTP/connection details and fix endpoint/proxy settings accordingly.","Test listing stability against the replica with the litestream ltx command; if listings repeatedly truncate, check the gateway (MinIO/version) health.","Update Litestream / replica client SDK versions if the provider changed pagination behavior."],"exampleFix":null,"handlingStrategy":"retry","validationCode":null,"typeGuard":null,"tryCatchPattern":"if err := db.Sync(ctx); err != nil {\n    if strings.Contains(err.Error(), \"iterate remote files\") {\n        // listing closed with backend error; retry after short delay\n        time.Sleep(2 * time.Second)\n        return db.Sync(ctx)\n    }\n    return err\n}","preventionTips":["Keep proxies/gateways (MinIO) healthy and updated","Avoid aggressive idle-timeout settings on outbound connections","Retry idempotent syncs rather than treating transient listing errors as fatal"],"tags":["go","storage","iterator","replication"],"backgroundTag":"network-request-failed","analyzedSha":"4ed7a308f6271ebfd2b0a6e4b70b03011a37e4a3","analyzedAt":"2026-09-06T18:29:25.564Z","contentChangedAt":"2026-09-06T18:29:25.564Z","schemaVersion":2},"datasetVersion":"2026-09-14T00:17:10.932Z"}