sax parser bug

When I use SAX parser (tar file is Xerces-J-bin.2.2.0.tar)
When i call Saxparser.parse() method sometime I get NullPointerException.
This happens only very rarely
this is stack trace i get.

ava.lang.NullPointerException
        at
org.apache.xerces.impl.xs.traversers.XSDElementTraverser.traverseLocal(Unkno
wn Source)
        at
org.apache.xerces.impl.xs.traversers.XSDElementTraverser.traverseLocal(Unkno
wn Source)
        at
org.apache.xerces.impl.xs.traversers.XSDAbstractParticleTraverser.traverseSe
qChoice(Unknown Source)
        at
org.apache.xerces.impl.xs.traversers.XSDAbstractParticleTraverser.traverseSe
quence(Unknown Source)
        at
org.apache.xerces.impl.xs.traversers.XSDComplexTypeTraverser.processComplexC
ontent(Unknown Source)
        at
org.apache.xerces.impl.xs.traversers.XSDComplexTypeTraverser.traverseComplex
TypeDecl(Unknown Source)
        at
org.apache.xerces.impl.xs.traversers.XSDComplexTypeTraverser.traverseLocal(U
nknown Source)
        at
org.apache.xerces.impl.xs.traversers.XSDElementTraverser.traverseNamedElemen
t(Unknown Source)
        at
org.apache.xerces.impl.xs.traversers.XSDElementTraverser.traverseLocal(Unkno
wn Source)
        at
org.apache.xerces.impl.xs.traversers.XSDElementTraverser.traverseLocal(Unkno
wn Source)
        at
org.apache.xerces.impl.xs.traversers.XSDAbstractParticleTraverser.traverseSe
qChoice(Unknown Source)
        at
org.apache.xerces.impl.xs.traversers.XSDAbstractParticleTraverser.traverseSe
quence(Unknown Source)
        at
org.apache.xerces.impl.xs.traversers.XSDComplexTypeTraverser.processComplexC
ontent(Unknown Source)
        at
org.apache.xerces.impl.xs.traversers.XSDComplexTypeTraverser.traverseComplex
TypeDecl(Unknown Source)
        at
org.apache.xerces.impl.xs.traversers.XSDComplexTypeTraverser.traverseLocal(U
nknown Source)
        at
org.apache.xerces.impl.xs.traversers.XSDElementTraverser.traverseNamedElemen
t(Unknown Source)
        at
org.apache.xerces.impl.xs.traversers.XSDElementTraverser.traverseLocal(Unkno
wn Source)
        at
org.apache.xerces.impl.xs.traversers.XSDElementTraverser.traverseLocal(Unkno
wn Source)
        at
org.apache.xerces.impl.xs.traversers.XSDAbstractParticleTraverser.traverseSe
qChoice(Unknown Source)
        at
org.apache.xerces.impl.xs.traversers.XSDAbstractParticleTraverser.traverseSe
quence(Unknown Source)
        at
org.apache.xerces.impl.xs.traversers.XSDComplexTypeTraverser.processComplexC
ontent(Unknown Source)
        at
org.apache.xerces.impl.xs.traversers.XSDComplexTypeTraverser.traverseComplex
TypeDecl(Unknown Source)
        at
org.apache.xerces.impl.xs.traversers.XSDComplexTypeTraverser.traverseLocal(U
nknown Source)
        at
org.apache.xerces.impl.xs.traversers.XSDElementTraverser.traverseNamedElemen
t(Unknown Source)
        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
dot.pkg.dsim.XMLToJava.XMLToJavaConverter.parseXML(XMLToJavaConverter.java:3
45)
        at
dot.pkg.dsim.XMLToJava.XMLToJavaController.getIOObject(XMLToJavaController.j
ava:30)
        at dot.pkg.dsim.DSIMBean.process(DSIMBean.java:163)
        at
dot.pkg.dsim.DSIMBean_vzbbf9_EOImpl.process(DSIMBean_vzbbf9_EOImpl.java:46)
        at dot.pkg.dsim.DSIMBean_vzbbf9_EOImpl_WLSkel.invoke(Unknown Source)
        at
weblogic.rmi.internal.BasicServerRef.invoke(BasicServerRef.java:362)
        at
weblogic.rmi.cluster.ReplicaAwareServerRef.invoke(ReplicaAwareServerRef.java
:114)
        at
weblogic.rmi.internal.BasicServerRef$1.run(BasicServerRef.java:313)
        at
weblogic.security.service.SecurityServiceManager.runAs(SecurityServiceManage
r.java:785)
        at
weblogic.rmi.internal.BasicServerRef.handleRequest(BasicServerRef.java:308)
        at
weblogic.rmi.internal.BasicExecuteRequest.execute(BasicExecuteRequest.java:3
0)
        at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:153)
        at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:134)


regards
ajmal



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