100% CPU Utilization during the stress
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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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