risingwavelabs/risingwave · error · StorageError

MemTable error: {0}

Error message

MemTable error: {0}

What it means

A StorageError variant wrapping Box<MemTableError>. The mem-table layer handles recently written, not-yet-flushed data; failures there (e.g. write conflicts, dirty-seal errors) are wrapped into the unified StorageError for callers.

Source

Thrown at src/storage/src/error.rs:52

        #[backtrace]
        ValueEncodingError,
    ),

    #[error("Serialize/deserialize error: {0}")]
    SerdeError(
        #[from]
        #[backtrace]
        memcomparable::Error,
    ),

    #[error("Sled error: {0}")]
    Sled(
        #[backtrace]
        #[from]
        sled::Error,
    ),

    #[error("MemTable error: {0}")]
    MemTable(
        #[backtrace]
        #[from]
        Box<MemTableError>,
    ),
}

pub type StorageResult<T> = std::result::Result<T, StorageError>;

View on GitHub (pinned to 6469eb736d)

Solutions

1. Read the inner MemTableError for the specific cause (e.g. conflict vs sealed table)
2. Retry conflicting writes; if conflicts persist, reduce concurrent writers to the same key or check upstream version-commit logic
3. If it recurs after failover, restart the compute node to rebuild mem-table state and report if reproducible

match write(key, val).await {
    Err(e) if matches!(e.kind(), StorageErrorKind::MemTable(_)) => {
        // inspect inner MemTableError; retry conflicts with backoff
        retry_with_backoff(|| write(key, val)).await
    }
    other => other,
}

When it happens

Trigger: Operations touching MemTableError-producing paths — e.g. a write to a memory table fails or a read of unflushed state encounters an inconsistency — converted into StorageError via #[from] on Box<MemTableError>.

Common situations: Write conflicts under high concurrent update load, internal state inconsistencies after failover, bugs in the mem-table coordination path.

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

• Hummock error: {0}
• (dataset guard acquisition error)
• failed to read Lance transaction history
• error while evaluating expression `{display}`
• failed to evaluate the input for fallback arm

AI-assisted analysis of risingwavelabs/risingwave@6469eb736d (2026-09-11). Data as JSON: /api/errors/e8ca1fb991af7323. Report an issue: GitHub.