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From "Andreas Veithen (JIRA)" <j...@apache.org>
Subject [jira] Commented: (AXIS2-4424) 100% CPU Utilization during the stress
Date Fri, 10 Jul 2009 21:45:15 GMT

    [ https://issues.apache.org/jira/browse/AXIS2-4424?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12729845#action_12729845
] 

Andreas Veithen commented on AXIS2-4424:
----------------------------------------

Can you enable debug logging on org.apache.axiom.om.util.StAXUtils and use the output to determine
the StAX implementation that is used (look for "XMLStreamReader is ...")?

> 100% CPU Utilization during the stress
> --------------------------------------
>
>                 Key: AXIS2-4424
>                 URL: https://issues.apache.org/jira/browse/AXIS2-4424
>             Project: Axis 2.0 (Axis2)
>          Issue Type: Bug
>          Components: transports
>    Affects Versions: 1.4.1
>         Environment: Linux, JDK 1.6.0_04-b12, tomcat-6.0.14
>            Reporter: Ravi Shanker Reddy
>             Fix For: 1.4.1
>
>
> We are continuously sending the SOAP requests to our server, after some time some of
the threads will get into following stack trace. The number of threads which falls into the
following stack trace will be increase with the time. Once 3 to 4 threads are fot into the
below stack trace the server CPU will reaces to 100%. We debugged the issue and find that
the problem is with the below method
> org.apache.axiom.soap.impl.builder StAXSOAPModelBuilder
> Method: 
>     public SOAPEnvelope getSOAPEnvelope() throws OMException {
>         while ((envelope == null) && !done) {
>             next();
>         }
>         return envelope;
>  }
>  In some specific conditions, the while loop never ends which resulted into 100% CPU.
> We enabled the TRACING and found that, once any thread falls in the this loop getting
following statement in log file continuously.
> Please note that, there is not issue with SOAP request which we are sending, we tested
the SOAP requests individually and all are getting proper response. 
> 09 Jul 2009 09:19:10  TRACE [http-8080-17] builder.StAXOMBuilder - START_DOCUMENT:
> 09 Jul 2009 09:19:10  TRACE [http-8080-17] builder.StAXOMBuilder - START_DOCUMENT:
> 09 Jul 2009 09:19:10  TRACE [http-8080-17] builder.StAXOMBuilder - START_DOCUMENT:
> 09 Jul 2009 09:19:10  TRACE [http-8080-17] builder.StAXOMBuilder - START_DOCUMENT:
> 09 Jul 2009 09:19:10  TRACE [http-8080-17] builder.StAXOMBuilder - START_DOCUMENT:
> 09 Jul 2009 09:19:10  TRACE [http-8080-17] builder.StAXOMBuilder - START_DOCUMENT:
> Stack Trace of The Thread:-
> http-8080-34" daemon prio=10 tid=0x7addb400 nid=0x2423 runnable [0x794ee000..0x794ef030]
>    java.lang.Thread.State: RUNNABLE
>         at org.apache.axiom.om.impl.builder.StAXOMBuilder.next(StAXOMBuilder.java:177)
>         at org.apache.axiom.soap.impl.builder.StAXSOAPModelBuilder.getSOAPEnvelope(StAXSOAPModelBuilder.java:156)
>         at org.apache.axiom.soap.impl.builder.StAXSOAPModelBuilder.<init>(StAXSOAPModelBuilder.java:105)
>         at org.apache.axis2.builder.SOAPBuilder.processDocument(SOAPBuilder.java:53)
>         at org.apache.axis2.transport.TransportUtils.createDocumentElement(TransportUtils.java:164)
>         at org.apache.axis2.transport.TransportUtils.createSOAPMessage(TransportUtils.java:112)
>         at org.apache.axis2.transport.http.HTTPTransportUtils.processHTTPPostRequest(HTTPTransportUtils.java:270)
>         at org.apache.axis2.transport.http.AxisServlet.doPost(AxisServlet.java:133)
>         at javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
>         at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
>         at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
>         at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
>         at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)
>         at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
>         at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
>         at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)
>         at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
>         at org.apache.catalina.valves.RequestDumperValve.invoke(RequestDumperValve.java:151)
>         at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:261)
>         at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
>         at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:581)
>         at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
>         at java.lang.Thread.run(Thread.java:619)

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