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devoss,
Exact Tomcat version? OS and version? Java version?
On 5/15/14, 12:00 PM, devoss ind wrote:
> On 7 May 2014 17:37, "devoss ind" <devoss....@gmail.com> wrote:
>>
>> Hi,
>>
>> Am using tomcat 6, java6 in production environment to run our
>> web
> application. We found that recently, cpu in top is showing 100%
> nearly. Then we dig into each thread cpu usage by -H option in top.
> We found only one thread is taking 100%usage and identified the
> thread using thread dump. The thread dump for that particular
> thread which is using 100% usage is as follows...
>>
>> "http-8080-exec-3687" daemon prio=10 tid=0x7336f400 nid=0x41a1
>> runnable
> [0x619ad000..0x619ade30]
>> java.lang.Thread.State: RUNNABLE at
> org.apache.coyote.http11.InternalNioOutputBuffer.addToBB(InternalNioOutputBuffer.java:616)
>>
>
- - locked <0x967b22f0> (a
> org.apache.coyote.http11.InternalNioOutputBuffer)
>> at
> org.apache.coyote.http11.InternalNioOutputBuffer.commit(InternalNioOutputBuffer.java:608)
>>
>
at
> org.apache.coyote.http11.Http11NioProcessor.action(Http11NioProcessor.java:1024)
>>
>
at org.apache.coyote.Response.action(Response.java:183)
>> at org.apache.coyote.Response.sendHeaders(Response.java:379) at
> org.apache.catalina.connector.OutputBuffer.doFlush(OutputBuffer.java:305)
>>
>
at
> org.apache.catalina.connector.OutputBuffer.flush(OutputBuffer.java:288)
>>
>
at
> org.apache.catalina.connector.Response.flushBuffer(Response.java:548)
>>
>
at
> org.apache.catalina.core.StandardHostValve.status(StandardHostValve.java:345)
>>
>
at
> org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:144)
>>
>
at
> org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
>>
>
at
> org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
>>
>
at
> org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
>>
>
at
> org.apache.coyote.http11.Http11NioProcessor.process(Http11NioProcessor.java:879)
>>
>
at
> org.apache.coyote.http11.Http11NioProtocol$Http11ConnectionHandler.process(Http11NioProtocol.java:719)
>>
>
at
> org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:2080)
>>
>
at
> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
>>
>
at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
>>
>
at java.lang.Thread.run(Thread.java:619)
>>
>> We can see that above thread is locked due to some problem in
>> NIO.
>>
>> We have verified in tomcat manager also for such thread. We found
>> that a
> particular thread is taking 14140517ms time and the request in that
> line is of POST request which is not related to our application.
>>
>> That particular thread is not releasing till we restart tomcat.
>>
>> This is happening frequently.
>>
>> Please help me to find out the root cause of this problem. How to
>> avoid
> restarts.
>>
>> Our server.xml connector configuration is as follows...
>>
>> <Connector port="${http.port}"
> protocol="org.apache.coyote.http11.Http11NioProtocol"
>> connectionTimeout="5000" acceptCount="1500" maxThreads="10000"
>> redirectPort="8443" />
>>
>> Please help in this thread locking problem.
>>
>
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