TOMCAT占用CPU100%问题

[qq_26871237]

求大神帮忙看看，TOMCAT运行一段时间以后，CPU就飙上去了，有几个线程占用的CPU比较多，都是提示下面的信息，下面是JSTACK导出的堆栈信息，不知道什么意思求解~~~~
"http-bio-8080-exec-9" daemon prio=10 tid=0x00007fb2640d4800 nid=0x7a00 runnable [0x00007fb25a26c000]
java.lang.Thread.State: RUNNABLE
at sun.nio.cs.UTF_8$Decoder.decodeLoop(Unknown Source)
at java.nio.charset.CharsetDecoder.decode(Unknown Source)
at sun.nio.cs.StreamDecoder.implRead(Unknown Source)
at sun.nio.cs.StreamDecoder.read(Unknown Source)
- locked <0x00000000bcec9788> (a java.io.InputStreamReader)
at sun.nio.cs.StreamDecoder.read0(Unknown Source)
- locked <0x00000000bcec9788> (a java.io.InputStreamReader)
at sun.nio.cs.StreamDecoder.read(Unknown Source)
at java.io.InputStreamReader.read(Unknown Source)
at nl.justobjects.pushlet.core.EventParser.parse(EventParser.java:37)
at nl.justobjects.pushlet.servlet.Pushlet.doPost(Pushlet.java:117)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:650)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at com.alibaba.druid.support.http.WebStatFilter.doFilter(WebStatFilter.java:123)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:505)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:169)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:956)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:436)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1078)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:625)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:316)
- locked <0x00000000bcec9880> (a org.apache.tomcat.util.net.SocketWrapper)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Unknown Source)

[skgary]

首先，得确认是不是这几个线程占用的CPU，如果是linux，还得看一些别的东西来确认，因为你说的是运行了一段时间，CPU才100%，所以也有可能是full gc 占用的，用jstat -gc 看fullgc占的比例。当然，也有可能不是full gc，这时还需要进一步的分析。 如果经过了上一步，你确认是这个线程占用的CPU，从你的call stack来看，这个是你的servlet的入口。 at nl.justobjects.pushlet.servlet.Pushlet.doPost(Pushlet.java:117) 从后续调用 来看，似乎 在解码一个很大的请求，是这样么？有人在不停的提交么？

[dzq584462393]

启动后是不是有循环调用了,或者访问一个连接后有循环调用

[qq_26871237]

多谢，确实是这个线程占用的CPU，而且有好几个这样的线程 我再看看吧，多谢