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From "Ravi Shanker Reddy (JIRA)" <j...@apache.org>
Subject [jira] Created: (AXIS2-4424) 100% CPU Utilization during the stress
Date Thu, 09 Jul 2009 14:54:14 GMT
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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