Github user MitchelLabonte commented on the issue:
https://github.com/apache/drill/pull/1069
@vrozov the Web server definitely doesn't need this much, but Drill won't
launch on a machine with more than 200 cores and throw an exception:
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
The configuration is there to have an option to not hit this exception on
startup on a machine with more than 200 cores.
---
