Query Cancellation

How to stop a running Pinot query.

Use query cancellation when a query is still running and you need to stop it before it finishes.

Enable tracking first

Query cancellation depends on query tracking being enabled on both the server and the broker.

pinot.server.enable.query.cancellation=true
pinot.broker.enable.query.cancellation=true

Preferred flow: cancel by client query ID

The cleanest cancellation flow is to set clientQueryId on the query and then cancel by that ID.

SET clientQueryId = 'query-2026-03-24-001';
SELECT * FROM stores LIMIT 100;

Then cancel it with the matching ID:

curl -X DELETE 'http://localhost:9000/queryClient/query-2026-03-24-001'

This is the best option for programs because the client query ID can also be used as the correlation ID for logs.

Fallback flow: cancel by internal broker ID

If you do not control the client query ID, Pinot can still cancel a query using the broker-assigned internal ID. That flow is more operationally awkward because you need both the broker and the internal query ID.

What this page covered

This page covered the prerequisites for cancellation, the recommended client-query-ID flow, and the internal-ID fallback.

Next step

If you need the query ID for logs or tracing, read Correlation IDs.

Related pages

• Query options

• Correlation IDs

• Query quotas