PQ84530: SPORADIC CONCURRENTMODIFICATIONEXCEPTIONS WHILE DRIVING WEB SERVICES CLIENTS INTO WEBSPHERE APPLICATION SERVER V5.02 Z/OS

 A fix is available

Obtain the fix for this APAR



APAR status
Closed as program error.

Error description
Customers may see sporadic ConncurrentModificationExceptions
while driving multiple WebServices client requests into
WebSphere Application Server v5.02 for z/OS. Stack trace:
java.util.ConcurrentModificationException: concurrent access to
HashMap attempted by Thread■WebSphere t=008d2e88,5,main
.at java.util.HashMap.onExit(HashMap.java(Compiled Code))
.at java.util.HashMap.rehash(HashMap.java(Inlined Compiled Code)
.at java.util.HashMap.put(HashMap.java(Compiled Code))
.at com.ibm.ws.webservices.engine.description.TypeDesc.getFieldN
.at com.ibm.ws.webservices.engine.encoding.ser.BeanDeserializer.
.at com.ibm.ws.webservices.engine.events.DEventProcessor.onSimpl
.at com.ibm.ws.webservices.engine.encoding.ser.BeanDeserializer.
.at com.ibm.ws.webservices.engine.events.P2DConverter.flush(P2DC
.at com.ibm.ws.webservices.engine.events.P2DConverter.endElement
.at sax.SAX2DocumentEntityParserBase.endElementAction(Unknown So
.at util.DocumentEntityParserBase.endElementEvent(Unknown Source
.at com.ibm.xml.b2b.scan.latin.LatinWFCDocumentScanner.scanEndEl
.at com.ibm.xml.b2b.scan.latin.LatinWFCDocumentScanner.scanConte
.at com.ibm.xml.b2b.scan.latin.LatinWFCDocumentScanner.scanDocum
.at sax.latin.LatinWFCSAX2DocumentEntityParser.scanDocument(Unkn
.at util.DocumentEntityParserBase.parse(Unknown Source)
.at sax.SAX2DocumentEntityParserBase.parseEntity(Unknown Source)
.at sax.SAX2DocumentEntityParserBase.parse(Unknown Source)
.at javax.xml.parsers.SAXParser.parse(Unknown Source)
.at com.ibm.ws.webservices.engine.encoding.DeserializationContex
.at com.ibm.ws.webservices.engine.SOAPPart.getAsSOAPEnvelope(SOA
.at com.ibm.ws.webservices.engine.Message.getSOAPEnvelope(Messag
.at com.ibm.ws.webservices.engine.handlers.jaxrpc.JAXRPCSOAPHand
.at com.ibm.ws.webservices.engine.handlers.jaxrpc.JAXRPCSOAPHand
8)
.at com.ibm.ws.webservices.engine.handlers.jaxrpc.JAXRPCHandler$
.at com.ibm.ws.webservices.engine.PivotHandlerWrapper.invoke(Piv
.at com.ibm.ws.webservices.engine.handlers.WrappedHandler.invoke
.at com.ibm.ws.webservices.engine.PivotHandlerWrapper.invoke(Piv
.at com.ibm.ws.webservices.engine.PivotHandlerWrapper.invoke(Piv
.at com.ibm.ws.webservices.engine.WebServicesEngine.invoke(WebSe
.at com.ibm.ws.webservices.engine.transport.http.WebServicesServ
.at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)
.at com.ibm.ws.webservices.engine.transport.http.WebServicesServ
.at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
.at com.ibm.ws.webcontainer.servlet.StrictServletInstance.doServ
.at com.ibm.ws.webcontainer.servlet.StrictLifecycleServlet._serv
.at com.ibm.ws.webcontainer.servlet.ServicingServletState.servic
Local fix Problem summary
****************************************************************
* USERS AFFECTED: All users of WebSphere Application Server    *
*                 V5.0 for z/OS                                *
****************************************************************
* PROBLEM DESCRIPTION: The following exception: java.util.     *
*                      ConcurrentModificationException:        *
*                      concurrent access to HashMap            *
*                      attempted by Thread WebSphere           *
*                                                              *
*                      May be issued while driving multiple    *
*                      Webservices client requests into        *
*                      a Websphere Application Server          *
****************************************************************
* RECOMMENDATION:                                              *
****************************************************************
Sporadic ConncurrentModificationExceptions
while driving multiple WebServices client requests into
WebSphere Application Server V5 for z/OS may be issued.

ExtendedMessage: TRAS0014I: The following exception was
     logged WebServicesFault
faultCode:
{http://websphere.ibm.com/webservices/}Server.generalException
faultString: java.util.ConcurrentModificationException:
   concurrent access to HashMap attempted by Thread

faultActor: null
faultDetail:
stackTrace: java.util.ConcurrentModificationException:
concurrent access to HashMap attempted by Thread
at java.util.HashMap.onExit(HashMap.java(Compiled Code))
at java.util.HashMap.rehash(HashMap.java(Compiled Code))
at java.util.HashMap.put(HashMap.java(Compiled Code))
at com.ibm.ws.webservices.engine.description.TypeDesc.
    getFieldNameForElement(TypeDesc.java(Compiled Code))
at com.ibm.ws.webservices.engine.encoding.ser.BeanDeserializer.
     onStartChild(BeanDeserializer.java:218)
at com.ibm.ws.webservices.engine.events.DEventProcessor.
     onSimpleChild(DEventProcessor.java:212)
Problem conclusion
This issue corresponds to WebSphere Application Server for
Distributed APAR 
PQ85560. The fix for APAR 
PQ85560 has now been
into WebSphere Application Server V5.0 for z/OS with APAR
PQ84530.

APAR PQ84530 is associated with SERVICE LEVEL W502009 of
WebSphere Application Server V5.0 for z/OS.
Temporary fix Comments
APAR information
APAR number PQ84530
Reported component name WEBSPHERE FOR Z
Reported component ID 5655I3500
Reported release 500
Status CLOSED PER
PE NoPE
HIPER NoHIPER
Special Attention NoSpecatt
Submitted date 2004-02-11
Closed date 2004-05-21
Last modified date 2004-06-03

APAR is sysrouted FROM one or more of the following:

APAR is sysrouted TO one or more of the following:
PQ85560 PQ88117

Modules/Macros
BBOUBINF          

Publications Referenced

Fix information
Fixed component name WEBSPHERE FOR Z
Fixed component ID 5655I3500

Applicable component levels
R500 PSY UQ88747    UP04/05/27 P F405

  Fix is available
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Document Information


Current web document: swg1PQ84530.html
Product categories: Software > Application Servers > Distributed Application & Web Servers > WebSphere Application Server for z/OS
Operating system(s):
Software version: 500
Software edition:
Reference #: PQ84530
IBM Group: Software Group
Modified date: Jun 3, 2004