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From Hari Nakka <nhrjr9...@gmail.com>
Subject high cpu threads (solr 7.5)
Date Wed, 03 Apr 2019 23:39:01 GMT
We are noticing high CPU utilization on below threads.  Looks like a known
issue with. (https://github.com/netty/netty/issues/327)

But not sure if this has been addressed in any of the 1.8 releases.

Can anyone help with this?


Version: solr cloud 7.5

OS: CentOS 7

JDK: Oracle JDK 1.8.0_191





"qtp574568002-3821728" #3821728 prio=5 os_prio=0 tid=0x00007f4f20018000
nid=0x4996 runnable [0x00007f51fc6d8000]

   java.lang.Thread.State: RUNNABLE

        at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)

        at sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:269)

        at sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:93)

        at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:86)

        - locked <0x000000064cded430> (a sun.nio.ch.Util$3)

        - locked <0x000000064cded418> (a
java.util.Collections$UnmodifiableSet)

        - locked <0x000000064cdf6e38> (a sun.nio.ch.EPollSelectorImpl)

        at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:97)

        at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:101)

        at
org.eclipse.jetty.io.ManagedSelector$SelectorProducer.select(ManagedSelector.java:396)

        at
org.eclipse.jetty.io.ManagedSelector$SelectorProducer.produce(ManagedSelector.java:333)

        at
org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.produceTask(EatWhatYouKill.java:357)

        at
org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:181)

        at
org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.tryProduce(EatWhatYouKill.java:168)

        at
org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:126)

        at
org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:366)

        at
org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:762)

        at
org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:680)

        at java.lang.Thread.run(Thread.java:748)

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