{"record":{"id":"1e8df19fe41ee233","repo":"nats-io/nats-server","slug":"error-reading-snapshot-v","errorCode":null,"errorMessage":"Error reading snapshot: %v","messagePattern":"Error reading snapshot: (.+?)","errorType":"console","errorClass":null,"httpStatus":null,"severity":"error","filePath":"server/raft.go","lineNumber":2031,"sourceCode":"\tif snap.lastIndex != n.papplied {\n\t\treturn 0, nil, errors.New(\"snapshot index mismatch\")\n\t}\n\treturn snap.lastIndex, snap.data, nil\n}\n\n// loadLastSnapshot will load and return our last snapshot.\n// Lock should be held.\nfunc (n *raft) loadLastSnapshot() (*snapshot, error) {\n\tif n.snapfile == _EMPTY_ {\n\t\treturn nil, errNoSnapAvailable\n\t}\n\n\tn.dios.acquire()\n\tbuf, err := os.ReadFile(n.snapfile)\n\tn.dios.release()\n\n\tif err != nil {\n\t\tn.warn(\"Error reading snapshot: %v\", err)\n\t\treturn nil, err\n\t}\n\tif len(buf) < minSnapshotLen {\n\t\tn.warn(\"Snapshot corrupt, too short\")\n\t\treturn nil, errSnapshotCorrupt\n\t}\n\n\t// Check to make sure hash is consistent.\n\thoff := len(buf) - 8\n\tlchk := buf[hoff:]\n\tn.hh.Reset()\n\tn.hh.Write(buf[:hoff])\n\tvar hb [highwayhash.Size64]byte\n\tif !bytes.Equal(lchk[:], n.hh.Sum(hb[:0])) {\n\t\tn.warn(\"Snapshot corrupt, checksums did not match\")\n\t\treturn nil, errSnapshotCorrupt\n\t}\n","sourceCodeStart":2013,"sourceCodeEnd":2049,"githubUrl":"https://github.com/nats-io/nats-server/blob/3a66a489d262bf89b71a71c955c94920394532f3/server/raft.go#L2013-L2049","documentation":"A warning logged by raft.loadLastSnapshot() when reading the node's snapshot file fails (os.ReadFile error such as missing, permission-denied, or I/O error). The function returns the error, so the node cannot restore from the last snapshot and must rely on WAL replay or peer catch-up.","triggerScenarios":"Thrown at server/raft.go:2031 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":["Check the snapshot file's existence and permissions at the path derived from the wrapped error","Verify disk health for the raft storage directory","If the snapshot is unrecoverable, resync the node from an intact peer"],"exampleFix":null,"handlingStrategy":"retry","validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"3a66a489d262bf89b71a71c955c94920394532f3","analyzedAt":"2026-09-02T04:41:54.247Z","contentChangedAt":null,"schemaVersion":2},"datasetVersion":"2026-09-08T10:18:20.063Z"}