{"record":{"id":"63cb8cce507d7242","repo":"hyperledger/fabric","slug":"error-deleting-leveldb-key-v","errorCode":null,"errorMessage":"error deleting leveldb key [%#v]","messagePattern":"error deleting leveldb key \\[%#v\\]","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"common/ledger/util/leveldbhelper/leveldb_helper.go","lineNumber":154,"sourceCode":"\tif err != nil {\n\t\tlogger.Errorf(\"Error writing leveldb key [%#v]\", key)\n\t\treturn errors.Wrapf(err, \"error writing leveldb key [%#v]\", key)\n\t}\n\treturn nil\n}\n\n// Delete deletes the given key\nfunc (dbInst *DB) Delete(key []byte, sync bool) error {\n\tdbInst.mutex.RLock()\n\tdefer dbInst.mutex.RUnlock()\n\two := dbInst.writeOptsNoSync\n\tif sync {\n\t\two = dbInst.writeOptsSync\n\t}\n\terr := dbInst.db.Delete(key, wo)\n\tif err != nil {\n\t\tlogger.Errorf(\"Error deleting leveldb key [%#v]\", key)\n\t\treturn errors.Wrapf(err, \"error deleting leveldb key [%#v]\", key)\n\t}\n\treturn nil\n}\n\n// GetIterator returns an iterator over key-value store. The iterator should be released after the use.\n// The resultset contains all the keys that are present in the db between the startKey (inclusive) and the endKey (exclusive).\n// A nil startKey represents the first available key and a nil endKey represent a logical key after the last available key\nfunc (dbInst *DB) GetIterator(startKey []byte, endKey []byte) iterator.Iterator {\n\tdbInst.mutex.RLock()\n\tdefer dbInst.mutex.RUnlock()\n\treturn dbInst.db.NewIterator(&goleveldbutil.Range{Start: startKey, Limit: endKey}, dbInst.readOpts)\n}\n\n// WriteBatch writes a batch\nfunc (dbInst *DB) WriteBatch(batch *leveldb.Batch, sync bool) error {\n\tdbInst.mutex.RLock()\n\tdefer dbInst.mutex.RUnlock()\n\two := dbInst.writeOptsNoSync","sourceCodeStart":136,"sourceCodeEnd":172,"githubUrl":"https://github.com/hyperledger/fabric/blob/2736b63f8fd5932511d56fe68b7039d15977f7f6/common/ledger/util/leveldbhelper/leveldb_helper.go#L136-L172","documentation":"DB.Delete wraps goleveldb Delete failures with the key being removed and logs it. Deletion of e.g. a ledger ID failed at the storage layer. Note ErrNotFound is not special-cased here — goleveldb Delete of a missing key normally succeeds, so this error indicates a real storage failure.","triggerScenarios":"Deleting after the DB was closed; I/O failure writing the deletion record (disk full, permissions); corrupted memtable/manifest state.","commonSituations":"Ledger removal during peer shutdown racing with provider close; disk-full conditions; corrupted database files after a crash.","solutions":["Verify the DB is still open for the duration of the delete call.","Check disk space and filesystem permissions on the ledger path.","If the wrapped error indicates corruption, restore the DB from backup or re-provision.","Retry once for transient I/O errors before failing the higher-level operation."],"exampleFix":"// before\nif err := db.Delete(ledgerID, true); err != nil { return err }\n// after\nif err := db.Delete(ledgerID, true); err != nil {\n  return fmt.Errorf(\"could not remove ledger id %q: %w\", ledgerID, err)\n}","handlingStrategy":"try-catch","validationCode":null,"typeGuard":"func isDeleteErr(err error) bool {\n  return err != nil && strings.Contains(err.Error(), \"error deleting leveldb key\")\n}","tryCatchPattern":"if err := db.Delete(key, true); err != nil {\n  return fmt.Errorf(\"leveldb delete of %#v failed: %w\", key, err)\n}","preventionTips":["Serialize delete operations with DB lifetime management","Check disk health/space before bulk deletions","Avoid deleting while the provider is shutting down","Log and retry once on transient storage errors"],"tags":["leveldb","storage","golang"],"backgroundTag":"leveldb-delete-failed","analyzedSha":"2736b63f8fd5932511d56fe68b7039d15977f7f6","analyzedAt":"2026-09-04T08:52:36.465Z","contentChangedAt":"2026-09-04T08:52:36.465Z","schemaVersion":2},"datasetVersion":"2026-09-08T15:18:49.778Z"}