{"record":{"id":"4aab03933c835305","repo":"influxdata/influxdb","slug":"failed-to-deserialize-table-index-snapshot","errorCode":null,"errorMessage":"Failed to deserialize table index snapshot","messagePattern":"Failed to deserialize table index snapshot","errorType":"error_code","errorClass":"TableIndexError","httpStatus":null,"severity":"error","filePath":"influxdb3_write/src/table_index.rs","lineNumber":40,"sourceCode":"    #[error(\"Failed to load table index from object store\")]\n    LoadIndex(#[source] object_store::Error),\n\n    #[error(\"Failed to deserialize table index\")]\n    SerializeIndex(#[source] serde_json::Error),\n\n    #[error(\"Failed to deserialize table index\")]\n    DeserializeIndex(#[source] serde_json::Error),\n\n    #[error(\"Failed to list table index snapshots from object store\")]\n    ListSnapshots(#[source] object_store::Error),\n\n    #[error(\"Failed to list table indices from object store\")]\n    ListIndices(#[source] object_store::Error),\n\n    #[error(\"Failed to load table index snapshot from object store\")]\n    LoadSnapshot(#[source] object_store::Error),\n\n    #[error(\"Failed to deserialize table index snapshot\")]\n    DeserializeSnapshot(#[source] serde_json::Error),\n\n    #[error(\"Failed to persist table index to object store\")]\n    PersistIndex(#[source] object_store::Error),\n\n    #[error(\"Failed to delete table index snapshot from object store\")]\n    DeleteSnapshot(#[source] object_store::Error),\n\n    #[error(\"Cannot merge table indices with mismatched identifiers: {expected} != {actual}\")]\n    MergeMismatch {\n        expected: TableIndexId,\n        actual: TableIndexId,\n    },\n\n    #[error(\"Failed to parse table index path from object store path\")]\n    TableIndexPath(#[source] crate::paths::PathError),\n\n    #[error(\"Failed to parse table index snapshot path from object store path\")]","sourceCodeStart":22,"sourceCodeEnd":58,"githubUrl":"https://github.com/influxdata/influxdb/blob/06200ef96ba82c5f6727e5038a83af8e722c6875/influxdb3_write/src/table_index.rs#L22-L58","documentation":"TableIndexError::DeserializeSnapshot wraps a serde_json::Error raised when the bytes of a fetched table index snapshot object cannot be parsed into the snapshot struct (PersistedSnapshot/PersistedSnapshotVersion). The object exists but its JSON content is invalid or has an unexpected schema. The serde_json::Error is available as #[source].","triggerScenarios":"serde_json::from_slice on the bytes returned from loading a table index snapshot object (table_index.rs ~205 area / snapshot load path in table_index.rs), mapping parse failures to DeserializeSnapshot.","commonSituations":"Snapshot object truncated by an interrupted upload or partial multipart completion; snapshot written by a newer/older InfluxDB3 version with a changed PersistedSnapshot schema; manual edits or corruption in the bucket.","solutions":["Download the snapshot object and validate it with jq / serde_json to see the exact parse error","Compare the InfluxDB3 version that wrote the snapshot against the one reading it; upgrade to a compatible version","Delete the corrupt snapshot and rebuild the table index from remaining valid snapshots (or re-persist)","Restore the object from a backup if it was corrupted by an interrupted write"],"exampleFix":"// before: reading a snapshot written by a newer schema version\ninfluxdb3 3.0.0 reading snapshots from 3.1.0 -> DeserializeSnapshot\n// after: run a version that understands PersistedSnapshotVersion\ninfluxdb3 3.1.0 serve --object-store ...","handlingStrategy":"fallback","validationCode":"// validate snapshot JSON before relying on it\nserde_json::from_slice::<PersistedSnapshotVersion>(&bytes)\n    .map_err(|e| log::error(\"snapshot JSON invalid: {e}\"));","typeGuard":"fn is_deserialize_snapshot(e: &TableIndexError) -> bool {\n    matches!(e, TableIndexError::DeserializeSnapshot(_))\n}","tryCatchPattern":"match load_snapshot_bytes(key).await {\n    Ok(bytes) => match serde_json::from_slice(&bytes) {\n        Ok(snap) => snap,\n        Err(_) => skip_and_rebuild_from_remaining_snapshots().await?,\n    },\n    other => other?,\n}","preventionTips":["Ensure uploads complete atomically (multipart completion checks)","Keep InfluxDB3 versions homogeneous across the cluster","Validate restored objects with a JSON parser before use","Keep backups of snapshot objects for recovery"],"tags":["deserialization","serde","snapshot","corruption"],"backgroundTag":"json-parse-error","analyzedSha":"06200ef96ba82c5f6727e5038a83af8e722c6875","analyzedAt":"2026-09-19T12:55:30.003Z","contentChangedAt":"2026-09-19T12:55:30.003Z","schemaVersion":2},"datasetVersion":"2026-09-23T08:17:48.524Z"}