druid/services
Abhishek Agarwal 1ddbaa8744
Reserve threads for non-query requests without using laning (#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.

Right now, you can still get that isolation by setting druid.query.scheduler.numThreads to a value lowe than druid.server.http.numThreads. That enables total laning but the side effect is that excess requests are not queued and rejected outright that leads to a bad user experience.

Parked requests are timed out after 30 seconds by default. I overrode that to the maxQueryTimeout in this PR.
2023-07-20 15:03:48 +05:30
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src Reserve threads for non-query requests without using laning (#14576) 2023-07-20 15:03:48 +05:30
pom.xml Prepare master branch for next release, 28.0.0 (#14595) 2023-07-18 09:22:30 +05:30