Netty worker threads cause system high cpu ------------------------------------------ Key: TEIID-3070 URL: https://issues.jboss.org/browse/TEIID-3070 Project: Teiid Issue Type: Bug Components: Server Affects Versions: 8.7, 8.9 Environment: JDV 6.1.0.DR2 JDV 6.0 Reporter: Kylin Soong Assignee: Kylin Soong I have hit this issue many times in deploying a VDB to JDV, All CPU be used by netty worker threads: ~~~ "New I/O worker #3" daemon prio=10 tid=0x00007fc71c0d2000 nid=0x320b runnable [0x00007fc7074f3000] 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:79) at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:87) - locked <0x00000000c42b4318> (a sun.nio.ch.Util$2) - locked <0x00000000c42b4328> (a java.util.Collections$UnmodifiableSet) - locked <0x00000000c42b42d0> (a sun.nio.ch.EPollSelectorImpl) at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:98) at org.jboss.netty.channel.socket.nio.SelectorUtil.select(SelectorUtil.java:64) ~~~ Seems this is a exist netty issue, search "jboss netty high cpu" via google we can get lots of result. Below link have detailed depiction about this issue; https://github.com/kylinsoong/teiid-samples/tree/master/highcpu