Using JMeter test client to load-test our application,
XSDElementTraverser.traverseLocal() throws a NullPointerException. The test
I'm running simply creates multiple (10) threads sending exactly the same
xml message to our application. Some threads work ok, others throw an
exception - see log below. This leads me to believe that this method is not
threadsafe.
I'm sure someone else must have come across this before, but I cannot check
the usergroup archives at the moment as they are down for temporary
upgrades.
All comments gratefully received.
Martin
Nested Final: java.lang.NullPointerException
2003-05-01 11:21:02,015 [ExecuteThread: '7' for queue: 'default'] DEBUG
com.rdf.nr.ctp.infrastructure.protocol.generic.r
esponsestatus.responseexception.logging - Http403SystemException Exception
caused by: java.lang.NullPointerException
at
org.apache.xerces.impl.xs.traversers.XSDElementTraverser.traverseLocal(Unkno
wn Source)
at
org.apache.xerces.impl.xs.traversers.XSDHandler.traverseLocalElements(Unknow
n Source)
at
org.apache.xerces.impl.xs.traversers.XSDHandler.parseSchema(Unknown Source)
at org.apache.xerces.impl.xs.XMLSchemaLoader.loadSchema(Unknown
Source)
at
org.apache.xerces.impl.xs.XMLSchemaValidator.findSchemaGrammar(Unknown
Source)
at
org.apache.xerces.impl.xs.XMLSchemaValidator.handleStartElement(Unknown
Source)
at org.apache.xerces.impl.xs.XMLSchemaValidator.startElement(Unknown
Source)
at
org.apache.xerces.impl.XMLNSDocumentScannerImpl.scanStartElement(Unknown
Source)
at
org.apache.xerces.impl.XMLNSDocumentScannerImpl$NSContentDispatcher.scanRoot
ElementHook(Unknown Source)
at
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatc
her.dispatch(Unknown Source)
at
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown
Source)
at org.apache.xerces.parsers.DTDConfiguration.parse(Unknown Source)
at org.apache.xerces.parsers.DTDConfiguration.parse(Unknown Source)
at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)
at
org.exolab.castor.xml.Unmarshaller.unmarshal(Unmarshaller.java:542)
at
org.exolab.castor.xml.Unmarshaller.unmarshal(Unmarshaller.java:631)
at
com.rdf.infrastructure.xmlhandling.binding.castor.CastorXmlHandler.bind(Cast
orXmlHandler.java:74)
at
com.rdf.nr.ctp.infrastructure.xmlhandling.ctpbinding.CtpXmlHandler.bindAipRe
quest(CtpXmlHandler.java:234)
at
com.rdf.nr.ctp.infrastructure.xmlhandling.ctpbinding.CtpXmlHandler.bind(CtpX
mlHandler.java:121)
at
com.rdf.nr.ctp.app.processctprequest.ProcessCtpRequestCommand.doIt(ProcessCt
pRequestCommand.java:281)
at
com.rdf.infrastructure.command.ejb.ApplicationCommandInvokerBean.invokeTrans
actional(ApplicationCommandInvoke
rBean.java:101)
at
com.rdf.infrastructure.command.ejb.ApplicationCommandInvokerBean_br6vzz_EOIm
pl.invokeTransactional(Applicatio
nCommandInvokerBean_br6vzz_EOImpl.java:125)
at
com.rdf.infrastructure.command.DefaultCommandInvoker.invoke(DefaultCommandIn
voker.java:124)
at
com.rdf.nr.ctp.application.processctprequest.ProcessCtpRequestServlet.doPost
(ProcessCtpRequestServlet.java:20
4)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at
weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java
:262)
at
weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java
:198)
at
weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletCo
ntext.java:2637)
at
weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java
:2359)
at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:139)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:120)
Martin Wells
RDF Consulting Ltd
15 Queen Square
Brighton
BN13FD
01273 200132
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