{"record":{"id":"e547869f74658a10","repo":"hyperledger/fabric","slug":"error-removing-the-block-file-s","errorCode":null,"errorMessage":"error removing the block file [%s]","messagePattern":"error removing the block file \\[(.+?)\\]","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"common/ledger/blkstorage/rollback.go","lineNumber":192,"sourceCode":"\t\treturn err\n\t}\n\t// must not use index for block location search since the index can be behind the target block\n\ttargetFileNum, err := binarySearchFileNumForBlock(r.ledgerDir, r.targetBlockNum)\n\tif err != nil {\n\t\treturn err\n\t}\n\tlastFileNum, err := retrieveLastFileSuffix(r.ledgerDir)\n\tif err != nil {\n\t\treturn err\n\t}\n\n\tlogger.Infof(\"Removing all block files with suffixNum in the range [%d] to [%d]\",\n\t\ttargetFileNum+1, lastFileNum)\n\n\tfor n := lastFileNum; n >= targetFileNum+1; n-- {\n\t\tfilepath := deriveBlockfilePath(r.ledgerDir, n)\n\t\tif err := os.Remove(filepath); err != nil {\n\t\t\treturn errors.Wrapf(err, \"error removing the block file [%s]\", filepath)\n\t\t}\n\t}\n\n\tlogger.Infof(\"Truncating block file [%d] to the end boundary of block number [%d]\", targetFileNum, r.targetBlockNum)\n\tendOffset, err := calculateEndOffSet(r.ledgerDir, targetFileNum, r.targetBlockNum)\n\tif err != nil {\n\t\treturn err\n\t}\n\n\tfilePath := deriveBlockfilePath(r.ledgerDir, targetFileNum)\n\tif err := os.Truncate(filePath, endOffset); err != nil {\n\t\treturn errors.Wrapf(err, \"error truncating the block file [%s]\", filePath)\n\t}\n\n\treturn nil\n}\n\nfunc calculateEndOffSet(ledgerDir string, targetBlkFileNum int, blockNum uint64) (int64, error) {","sourceCodeStart":174,"sourceCodeEnd":210,"githubUrl":"https://github.com/hyperledger/fabric/blob/2736b63f8fd5932511d56fe68b7039d15977f7f6/common/ledger/blkstorage/rollback.go#L174-L210","documentation":"During rollbackBlockFiles, all block files with a number greater than the target file are removed so the ledger can be rolled back. If os.Remove fails on any of those files, the error is wrapped as \"error removing the block file [%s]\" and the rollback aborts, leaving files in a partially rolled-back state until retried.","triggerScenarios":"peer node rollback (RollbackKVLedger / rollbackBlockFiles) while the block file to delete is open by another process, is read-only, resides on a read-only/full filesystem, or the OS denies unlink permission on the ledger directory.","commonSituations":"Another peer process still running against the same ledger directory, root-owned files created by a different container run, read-only mounted volume during maintenance, or immutable file attributes (chattr +i).","solutions":["Stop all processes using the ledger directory (peer, containers) and re-run the rollback.","Check permissions/ownership of the ledger directory and files (chown/chmod to the peer user) and ensure the filesystem is writable.","Free disk space or remount the volume read-write if the FS reported EROFS/ENOSPC.","Remove immutable flags (chattr -i) if set, then retry rollback."],"exampleFix":"// before\n$ peer node rollback --channelID mychannel --blockNumber 50  // peer still running\n// after\n$ docker stop peer0.org1\n$ peer node rollback --channelID mychannel --blockNumber 50","handlingStrategy":"try-catch","validationCode":"for n := lastFileNum; n >= targetFileNum+1; n-- {\n    p := deriveBlockfilePath(ledgerDir, n)\n    if f, err := os.OpenFile(p, os.O_RDWR, 0); err != nil {\n        return fmt.Errorf(\"cannot remove %s (locked or missing): %w\", p, err)\n    } else {\n        f.Close()\n    }\n}","typeGuard":null,"tryCatchPattern":"if err := os.Remove(filepath); err != nil {\n    if errors.Is(err, os.ErrPermission) || errors.Is(err, syscall.EBUSY) {\n        return fmt.Errorf(\"stop processes using %s and retry: %w\", filepath, err)\n    }\n    return errors.Wrapf(err, \"error removing the block file [%s]\", filepath)\n}","preventionTips":["Ensure the peer and all containers using the ledger dir are stopped before rollback.","Run rollback as the same OS user that owns the ledger files.","Ensure the ledger volume is mounted read-write with free disk space.","Avoid immutable attributes or external file locks on ledger files."],"tags":["filesystem","rollback","permissions"],"backgroundTag":"file-remove-failed","analyzedSha":"2736b63f8fd5932511d56fe68b7039d15977f7f6","analyzedAt":"2026-09-04T08:52:36.465Z","contentChangedAt":"2026-09-04T08:52:36.465Z","schemaVersion":2},"datasetVersion":"2026-09-08T10:18:20.063Z"}