risingwavelabs/risingwave · error · SchedulerError
anyhow::Error
Error message
anyhow::Error
What it means
The `Internal` variant wraps any `anyhow::Error` transparently into the scheduler's `BatchError`. It is a catch-all for internal, unexpected errors that are not modeled as a dedicated variant (e.g. `anyhow!` bail sites inside the scheduler). Because it is `#[error(transparent)]`, the displayed message is whatever the inner anyhow error carried.
Solutions
- Inspect the inner anyhow message for the concrete failure and follow the fix for that specific message.
- Check the RisingWave log for the accompanying backtrace to locate the bail site.
- Retry the query if the cause is a transient race (e.g. table dropped concurrently).
- If reproducible, file an issue — an `Internal` error usually indicates an unexpected state the scheduler does not model.
Defensive patterns
Strategy: try-catch
Try / catch
// Match on the transparent inner variant
if let BatchError::Internal(anyhow_err) = &err {
log::error!("scheduler internal error: {anyhow_err:#}");
} Prevention
- Keep scheduler invariants covered by unit tests around stage splitting.
- Check logs/backtrace for the concrete anyhow message.
- Retry transient races; report reproducible ones.
When it happens
Trigger: Any `?` on a fallible operation inside frontend scheduler code that produces an `anyhow::Error`, e.g. `SchedulerError::Internal(anyhow!(...))` raised by plan fragmentation, split assignment, or snapshot/epoch resolution code paths in src/frontend/src/scheduler/.
Common situations: Running distributed queries where an invariant is broken mid-scheduling (unexpected plan shape, missing stage ids, dropped tables between plan and schedule). Often surfaces during plan fragmenter failures or snapshot query planning.
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
AI-assisted analysis of risingwavelabs/risingwave@6469eb736d (2026-09-11).
Data as JSON: /api/errors/94f36d59617e8549.
Report an issue: GitHub.
Appendix: source
Thrown at src/frontend/src/scheduler/error.rs:65
"Reject query: the {0} query number reaches the limit: {1}. Use `SHOW PROCESSLIST` to check for hanging queries and cancel them if needed."
)]
QueryReachLimit(QueryMode, u64),
#[error(transparent)]
BatchError(
#[from]
#[backtrace]
BatchError,
),
#[error(transparent)]
Connector(
#[from]
#[backtrace]
ConnectorError,
),
#[error(transparent)]
Internal(
#[from]
#[backtrace]
anyhow::Error,
),
}
impl From<SchedulerError> for RwError {
fn from(s: SchedulerError) -> Self {
ErrorCode::SchedulerError(Box::new(s)).into()
}
}
impl From<RwError> for SchedulerError {
fn from(e: RwError) -> Self {
Self::Internal(e.into())
}
}View on GitHub (pinned to 6469eb736d)