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https://issues.apache.org/jira/browse/DRILL-5994?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16321148#comment-16321148
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ASF GitHub Bot commented on DRILL-5994:
---------------------------------------
Github user vrozov commented on the issue:
https://github.com/apache/drill/pull/1069
@MitchelLabonte @arina-ielchiieva I don't think that Drill needs that many
threads/acceptors to handle HTTP(s) requests as it is not a real web (REST API)
server. For proper resource utilization, it will be better to limit the number
of acceptors to a small value (let's say 2 or 4 by default) instead of the
current default that uses a number of available processors and can be huge on
machines with lots of cores (32 or more). @paul-rogers What is your take on
this?
> Cannot start web server on a machine with more than 200 cores
> -------------------------------------------------------------
>
> Key: DRILL-5994
> URL: https://issues.apache.org/jira/browse/DRILL-5994
> Project: Apache Drill
> Issue Type: Improvement
> Affects Versions: 1.11.0
> Reporter: Mitchel Labonte
> Priority: Minor
> Labels: doc-impacting, ready-to-commit
> Fix For: 1.13.0
>
>
> If the WebServer is launched on a machine that has more than 200 cores, you
> get the following stack trace:
> {noformat}
> Exception in thread "main"
> org.apache.drill.exec.exception.DrillStartupException: Failure during initial
> startup of Drillbit:
> at org.apache.drill.exec.server.Drillbit.start(Drillbit.java:313)
> at org.apache.drill.exec.server.Drillbit.start(Drillbit.java:289)
> at org.apache.drill.exec.server.Drillbit.start(Drillbit.java:285)
> Caused by: java.lang.IllegalStateException: Insufficient max threads in
> ThreadPool: max=200 < needed=206
> at org.eclipse.jetty.server.Server.doStart(Server.java:321)
> at
> org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68)
> at org.eclipse.drill.exec.server.rest.WebServer.start(WebServer.java:197)
> at org.eclipse.drill.exec.server.Drillbit.run(Drillbit.java:140)
> at org.eclipse.drill.exec.server.Drillbit.start(Drillbit.java:309)
> ... 2 more
> {noformat}
> The cause of this is that in the WebServer start method, a Server instance is
> created with the default constructor, which initializes a QueuedThreadPool
> with a default maxThreads value of 200, and there is no way to configure this
> value.
> *For documentation*
> New config option - drill.exec.web_server.thread_pool_max.
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