Question

我在部署在具有2个核心的aws上的tomcat中运行java Web应用程序。问题是，每隔2-3天，两个CPU核心卡在100％的CPU利用率上，应用程序变得非常慢。当cpu被卡住100％时，通过在10秒间隔内获取tomcat的三个线程转储，我找到了导致问题的两个线程。这是堆栈跟踪。

Thread 1 :

http-bio-8080-exec-10 - priority:10 - threadId:0x00007fda4005a800 - nativeId:0x526e - state:RUNNABLE
stackTrace:
java.lang.Thread.State: RUNNABLE
at org.apache.coyote.http11.AbstractInputBuffer.nextRequest(AbstractInputBuffer.java:229)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1110)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:607)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:313)
- locked <0x00000000f4102c60> (a org.apache.tomcat.util.net.SocketWrapper)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)

2nd thread : 

http-bio-8080-exec-3 - priority:10 - threadId:0x00007fda24096800 - nativeId:0x524e - state:RUNNABLE
stackTrace:
java.lang.Thread.State: RUNNABLE
at org.apache.coyote.http11.AbstractInputBuffer.nextRequest(AbstractInputBuffer.java:229)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1110)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:607)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:313)
- locked <0x00000000f4102ca0> (a org.apache.tomcat.util.net.SocketWrapper)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)

如何解决问题。

Answer 1

症状看起来像这个Tomcat bug：

https://bz.apache.org/bugzilla/show_bug.cgi?id=57544

解决方案是将Tomcat更新为更新版本。

评论＃5 - Mark Thomas 2015-02-06 18:03:54 UTC

这已在trunk（9.0.x开发）中修复，8.0.x用于8.0.19及7.0.x用于7.0.60以后。

cpu核心卡在100％的CPU利用率上

1 个答案: