abhishekagarwal87 opened a new pull request, #15440:
URL: https://github.com/apache/druid/pull/15440

   This PR enables the flag by default to queue excess query requests in the 
jetty queue. Still keeping the flag so that it can be turned off if necessary. 
But the flag will be removed in the future. 
   
   Release notes
   - When query scheduler threads are less than server HTTP threads, total 
laning becomes on. This lets reserve some HTTP threads for non-query requests 
such as health checks. The total laning previously would reject any query 
request that exceeds the lane capacity. But now, those excess requests will 
instead be queued with a timeout equal to MIN(Integer.MAX_VALUE, 
`druid.server.http.maxQueryTimeout`)
   
   This PR has:
   
   - [x] been self-reviewed.
   - [x] been tested in a test Druid cluster.
   


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