risingwavelabs/risingwave · error · HummockError

Other error

Error message

Other error: {0}

What it means

HummockError::Other(String): catch-all variant of the storage-engine error enum for misc failures that do not map to a dedicated variant. It is a generic wrapper carrying the underlying error message, so the actual cause must be read from the embedded string.

Solutions

1. Read the embedded message to identify the specific invariant violated
2. If it comes from an invalid iter key range, verify the key bounds passed to the iterator
3. Enable debug builds (cfg!(debug_assertions)) to turn such violations into panics with clearer stack traces
4. Report to RisingWave maintainers if the invariant should never be violated

fn is_other_hummock_error(e: &HummockError) -> bool {
    matches!(e, HummockError::Other(_))
}

match result {
    Err(e) if is_other_hummock_error(&e) => {
        tracing::error!(msg = %e, "hummock invariant violated");
        // escalate: fail the operator / trigger recovery
    }
    other => other?,
}

When it happens

Trigger: Hummock code paths raising ad-hoc errors, e.g. HummockError::other(format!(...)) such as the invalid-iterator-key-range check in src/storage/src/hummock/store/version.rs:1017.

Common situations: Internal invariant violations in the storage layer, corrupt iterator inputs, or malformed internal state discovered at runtime.

Understand the failure class

Background: "This is a bug, please report it": internal invariant violations, unreachable panics, and SNH errors explained — this error's family across 47 libraries.

Related errors

• Barrier read is unavailable for now. Likely the cluster is…
• Change log retention miss: table
• Checksum mismatch: expected
• Committed epoch mismatch: table
• CompactionExecutor error

AI-assisted analysis of risingwavelabs/risingwave@6469eb736d (2026-09-11). Data as JSON: /api/errors/4486b9d955ab3108. Report an issue: GitHub.

Appendix: source

Thrown at src/storage/src/hummock/error.rs:79

        read_epoch: u64,
    },
    #[error("Barrier read is unavailable for now. Likely the cluster is recovering")]
    ReadCurrentEpoch,
    #[error("CompactionExecutor error: {0}")]
    CompactionExecutor(String),
    #[error("FileCache error: {0}")]
    FileCache(String),
    #[error("SstObjectIdTracker error: {0}")]
    SstObjectIdTrackerError(String),
    #[error("CompactionGroup error: {0}")]
    CompactionGroupError(String),
    #[error("SstableUpload error: {0}")]
    SstableUploadError(String),
    #[error("Read backup error: {0}")]
    ReadBackupError(String),
    #[error("Foyer error: {0}")]
    FoyerError(#[from] foyer::Error),
    #[error("Other error: {0}")]
    Other(String),
}

impl HummockError {
    pub fn invalid_format_version(v: u32) -> HummockError {
        HummockErrorInner::InvalidFormatVersion(v).into()
    }

    pub fn invalid_block() -> HummockError {
        HummockErrorInner::InvalidBlock.into()
    }

    pub fn encode_error(error: impl ToString) -> HummockError {
        HummockErrorInner::EncodeError(error.to_string()).into()
    }

    pub fn decode_error(error: impl ToString) -> HummockError {
        HummockErrorInner::DecodeError(error.to_string()).into()

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