{"record":{"id":"7cbabec210d05bd0","repo":"hyperledger/fabric","slug":"error-while-opening-the-snapshot-file-s","errorCode":null,"errorMessage":"error while opening the snapshot file: %s","messagePattern":"error while opening the snapshot file: (.+?)","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"common/ledger/snapshot/file.go","lineNumber":139,"sourceCode":"\n// FileReader reads from a ledger snapshot file. This is expected to be used for loading the ledger snapshot data\n// during bootstrapping a channel from snapshot. The data should be read, using the functions `DecodeXXX`,\n// in the same sequence in which the data was written by the functions `EncodeXXX` in the `FileCreator`.\n// Note that the FileReader does not verify the hash of stream and it is expected that the hash has been verified\n// by the consumer. Later, if we decide to perform this, on-the-side, while loading the snapshot data, the FileRedear,\n// like the FileCreator, would take a `hasher` as an input\ntype FileReader struct {\n\tfile              *os.File\n\tbufReader         *bufio.Reader\n\treusableByteSlice []byte\n}\n\n// OpenFile constructs a FileReader. This function returns an error if the format of the file, stored in the\n// first byte, does not match with the expectedDataFormat\nfunc OpenFile(filePath string, expectDataformat byte) (*FileReader, error) {\n\tfile, err := os.Open(filePath)\n\tif err != nil {\n\t\treturn nil, errors.Wrapf(err, \"error while opening the snapshot file: %s\", filePath)\n\t}\n\tbufReader := bufio.NewReader(file)\n\tdataFormat, err := bufReader.ReadByte()\n\tif err != nil {\n\t\tfile.Close()\n\t\treturn nil, errors.Wrapf(err, \"error while reading from the snapshot file: %s\", filePath)\n\t}\n\tif dataFormat != expectDataformat {\n\t\tfile.Close()\n\t\treturn nil, errors.New(fmt.Sprintf(\"unexpected data format: %x\", dataFormat))\n\t}\n\treturn &FileReader{\n\t\tfile:      file,\n\t\tbufReader: bufReader,\n\t}, nil\n}\n\n// DecodeString reads and decodes a string","sourceCodeStart":121,"sourceCodeEnd":157,"githubUrl":"https://github.com/hyperledger/fabric/blob/2736b63f8fd5932511d56fe68b7039d15977f7f6/common/ledger/snapshot/file.go#L121-L157","documentation":"OpenFile constructs a FileReader for loading a snapshot during channel bootstrap and wraps os.Open failures with this message. It means the snapshot file at filePath could not be opened at all — it is missing, unreadable, or the path is wrong. The expected data format check happens only after a successful open.","triggerScenarios":"Calling OpenFile(path, expectDataformat) where the file does not exist, permissions deny read, or path points to a directory.","commonSituations":"Bootstrapping a channel from a snapshot whose file was moved/deleted, wrong path configured in the snapshot config, or the peer process lacks read permission on the snapshot directory.","solutions":["Verify the snapshot file exists at the configured path and the path spelling is correct","Fix file permissions/ownership so the peer process can read it","Re-export or restore the snapshot if the file is genuinely missing"],"exampleFix":null,"handlingStrategy":"validation","validationCode":"func snapshotExists(p string) error {\n    st, err := os.Stat(p)\n    if err != nil { return fmt.Errorf(\"snapshot missing: %w\", err) }\n    if st.IsDir() { return errors.New(\"path is a directory\") }\n    if st.Size() == 0 { return errors.New(\"snapshot file is empty\") }\n    return nil\n}","typeGuard":null,"tryCatchPattern":"fr, err := snapshot.OpenFile(path, expectedFormat)\nif err != nil {\n    return fmt.Errorf(\"cannot load snapshot %s: %w\", path, err)\n}\ndefer fr.Close()","preventionTips":["Validate the snapshot path exists before bootstrapping","Ensure the peer process has read permission on the snapshot directory","Do not move/delete snapshot files while a channel is pending bootstrap"],"tags":["io","snapshot","file-not-found","bootstrap"],"backgroundTag":"file-not-found","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"}