It hasn’t been addressed by any Java 8 releases that I know of. See: https://issues.apache.org/jira/browse/SOLR-13349
The work-around in Solr is trivial, see the patch so it’d be simple to patch/compile on your own. It will be released in a Solr 7.7.2 and Solr 8.1 or later, neither of which have been released yet. Or move to Java 9 or later. > On Apr 3, 2019, at 4:39 PM, Hari Nakka <nhrjr9...@gmail.com> wrote: > > 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)
