abhishekagarwal87 opened a new pull request, #14576:
URL: https://github.com/apache/druid/pull/14576
This PR uses the QoSFilter available in Jetty to park the query requests
that exceed a configured limit. This is done so that other HTTP requests such
as health check calls do not get blocked if the query server is busy serving
long-running queries. The same mechanism can also be used in the future to
isolate interactive queries from long-running select queries from interactive
queries within the same broker.
Parked requests are timed out after 30 seconds by default. I overrode that
to 5 minutes in this PR though we probably want that to be configurable.
I tested it on a local cluster and verified that it works. Though it
requires a bit of polishing. So marking it draft.
This PR has:
- [ ] been self-reviewed.
- [ ] using the [concurrency
checklist](https://github.com/apache/druid/blob/master/dev/code-review/concurrency.md)
(Remove this item if the PR doesn't have any relation to concurrency.)
- [ ] added documentation for new or modified features or behaviors.
- [ ] a release note entry in the PR description.
- [ ] added Javadocs for most classes and all non-trivial methods. Linked
related entities via Javadoc links.
- [ ] added or updated version, license, or notice information in
[licenses.yaml](https://github.com/apache/druid/blob/master/dev/license.md)
- [ ] added comments explaining the "why" and the intent of the code
wherever would not be obvious for an unfamiliar reader.
- [ ] added unit tests or modified existing tests to cover new code paths,
ensuring the threshold for [code
coverage](https://github.com/apache/druid/blob/master/dev/code-review/code-coverage.md)
is met.
- [ ] added integration tests.
- [x] been tested in a test Druid cluster.
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