Tomcat 8.5上的JSSE客户端轮询器具有很高的CPU负载

我正在Windows Server 2008R2和Java 1.8.0_92上运行Tomcat 8.5.3。该过程消耗大量CPU(4个CPU中约占50%)。

JTop显示到目前为止,两个最消耗线程的线程是https-jsse-nio-443-ClientPoller-0和https-jsse-

nio-443-ClientPoller-1。

线程主要在这四个堆栈跟踪上循环:

sun.nio.ch.WindowsSelectorImpl$SubSelector.poll0(Native Method)

sun.nio.ch.WindowsSelectorImpl$SubSelector.poll(WindowsSelectorImpl.java:296)

sun.nio.ch.WindowsSelectorImpl$SubSelector.access$400(WindowsSelectorImpl.java:278)

sun.nio.ch.WindowsSelectorImpl.doSelect(WindowsSelectorImpl.java:159)

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

- locked sun.nio.ch.Util$2@2a3e6629

- locked java.util.Collections$UnmodifiableSet@7cdb1cd3

- locked sun.nio.ch.WindowsSelectorImpl@13dc3a00

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

org.apache.tomcat.util.net.NioEndpoint$Poller.run(NioEndpoint.java:791)

java.lang.Thread.run(Thread.java:745)

sun.nio.ch.WindowsSelectorImpl$SubSelector.processFDSet(WindowsSelectorImpl.java:345)

sun.nio.ch.WindowsSelectorImpl$SubSelector.processSelectedKeys(WindowsSelectorImpl.java:315)

sun.nio.ch.WindowsSelectorImpl$SubSelector.access$2900(WindowsSelectorImpl.java:278)

sun.nio.ch.WindowsSelectorImpl.updateSelectedKeys(WindowsSelectorImpl.java:495)

sun.nio.ch.WindowsSelectorImpl.doSelect(WindowsSelectorImpl.java:172)

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

- locked sun.nio.ch.Util$2@6f4350d0

- locked java.util.Collections$UnmodifiableSet@36157c3f

- locked sun.nio.ch.WindowsSelectorImpl@120cc3aa

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

org.apache.tomcat.util.net.NioEndpoint$Poller.run(NioEndpoint.java:791)

java.lang.Thread.run(Thread.java:745)

sun.nio.ch.WindowsSelectorImpl.resetWakeupSocket0(Native Method)

sun.nio.ch.WindowsSelectorImpl.resetWakeupSocket(WindowsSelectorImpl.java:473)

- locked java.lang.Object@450e5040

sun.nio.ch.WindowsSelectorImpl.doSelect(WindowsSelectorImpl.java:174)

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

- locked sun.nio.ch.Util$2@6f4350d0

- locked java.util.Collections$UnmodifiableSet@36157c3f

- locked sun.nio.ch.WindowsSelectorImpl@120cc3aa

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

org.apache.tomcat.util.net.NioEndpoint$Poller.run(NioEndpoint.java:791)

java.lang.Thread.run(Thread.java:745)

java.lang.Object.notifyAll(Native Method)

sun.nio.ch.WindowsSelectorImpl$StartLock.startThreads(WindowsSelectorImpl.java:189)

- locked sun.nio.ch.WindowsSelectorImpl$StartLock@1c512d03

sun.nio.ch.WindowsSelectorImpl$StartLock.access$300(WindowsSelectorImpl.java:181)

sun.nio.ch.WindowsSelectorImpl.doSelect(WindowsSelectorImpl.java:153)

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

- locked sun.nio.ch.Util$2@2a3e6629

- locked java.util.Collections$UnmodifiableSet@7cdb1cd3

- locked sun.nio.ch.WindowsSelectorImpl@13dc3a00

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

org.apache.tomcat.util.net.NioEndpoint$Poller.run(NioEndpoint.java:791)

java.lang.Thread.run(Thread.java:745)

任何的想法 ?

回答:

我在Tomcat 8.5.4 / Linux上遇到了类似的问题,在轮询线程上我看到了很高的CPU使用率(例如https-jsse-

nio-443-ClientPoller-0和1)。升级到8.5.5似乎已解决了该问题。

可能是这个错误:https :

//bz.apache.org/bugzilla/show_bug.cgi?id=60030

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