PK97531: NULLPOINTEREXCEPTION ENCOUNTERED WHEN ACCESSING AN ARD JSP FOR THE SECOND TIME

Fixes are available

APAR status

Closed as program error.

Error description

A NullPointerException is encountered when accessing an
Asynchronous Request Dispatcher (ARD) JavaServer Page (JSP)
for the second time.

Local fix

Problem summary

****************************************************************
* USERS AFFECTED:  IBM WebSphere Application Server version    *
*                  7.0 users of Asynchronous Request           *
*                  Dispatcher (ARD) on z/OS                    *
****************************************************************
* PROBLEM DESCRIPTION: A request to an ARD resource might      *
*                      result in a NullPointerException on     *
*                      z/OS                                    *
****************************************************************
* RECOMMENDATION:                                              *
****************************************************************
After a first successful request to an ARD resource, depending
on timing, the second request might fail with a
NullPointerException.  The following z/OS stack trace will be
observed on failure:

FunctionName:
com.ibm.ws.webcontainer.channel.WCChannelLink.finishBufferAsynch
   SourceId: com.ibm.ws.webcontainer.channel
   Category: SEVERE
   ExtendedMessage: Exception in finishBufferAsynch:
java.lang.NullPointerException
 at
com.ibm.ws.ard.channel.ARDHttpServiceContext.finishResponseMessa
ge(ARDHttpServiceContext.java:145)
 at
com.ibm.ws.webcontainer.channel.WCChannelLink.finishBufferAsynch
(WCChannelLink.java:552)
 at
com.ibm.ws.webcontainer.channel.WCChannelLink.finishBufferRespon
se(WCChannelLink.java:535)
 at
com.ibm.ws.webcontainer.channel.WCChannelLink.releaseChannelLink
(WCChannelLink.java:231)
 at
com.ibm.ws.webcontainer.channel.WCChannelLink.ready(WCChannelLin
k.java:201)
 at
com.ibm.ws.ard.channel.ARDChannelConnLink.handleDiscrimination(A
RDChannelConnLink.java:187)
 at
com.ibm.ws.ard.channel.ARDChannelConnLink.ready(ARDChannelConnLi
nk.java:92)
 at
com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleDiscr
imination(HttpInboundLink.java:455)
 at
com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleNewIn
formation(HttpInboundLink.java:384)
 at
com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.ready(HttpI
nboundLink.java:272)
 at
com.ibm.ws390.channel.xmem.XMemConnLink.ready(XMemConnLink.java:
844)
 at
com.ibm.ws390.channel.xmem.XMemInboundChannel.handleRequest(XMem
InboundChannel.java:340)
 at
com.ibm.ws390.xmem.XMemSRBridgeImpl.httpinvoke(XMemSRBridgeImpl.
java:104)
 at
com.ibm.ws390.xmem.XMemSRCppUtilities.httpinvoke(XMemSRCppUtilit
ies.java:74)
 at
com.ibm.ws390.orb.ServerRegionBridge.httpinvoke(ServerRegionBrid
ge.java:215)
 at
com.ibm.ws390.orb.ORBEJSBridge.httpinvoke(ORBEJSBridge.java:281)
 at sun.reflect.GeneratedMethodAccessor68.invoke(Unknown Source)
 at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethod
AccessorImpl.java:37)
 at java.lang.reflect.Method.invoke(Method.java:599)
 at
com.ibm.ws390.orb.parameters.HTTPInvoke.HTTPInvokeParmSetter(HTT
PInvoke.java:101)
 at
com.ibm.ws390.orb.CommonBridge.nativeRunApplicationThread(Native
 Method)
 at
com.ibm.ws390.orb.CommonBridge.runApplicationThread(CommonBridge
.java:463)
 at
com.ibm.ws.util.ThreadPool$ZOSWorker.run(ThreadPool.java:1750)

Problem conclusion

The WebContainer code was modified to correct the problem when
dispatching a request in an ARD mode.

APAR PK97531 is currently targeted for inclusion in Service
Level (Fix Pack) 7.0.0.7 of WebSphere Application Server V7.0.

Please refer to URL:
//www.ibm.com/support/docview.wss?rs=404&uid=swg27006970
for Fix Pack availability.

Temporary fix

Comments

APAR Information

APAR number
PK97531
Reported component name
WEBSPHERE FOR Z
Reported component ID
5655I3500
Reported release
700
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2009-09-30
Closed date
2009-10-07
Last modified date
2009-12-02

APAR is sysrouted FROM one or more of the following:

PK94868
APAR is sysrouted TO one or more of the following:

Fix information

Fixed component name
WEBSPHERE FOR Z
Fixed component ID
5655I3500

Applicable component levels

R700 PSY UK51554
UP09/11/10 P F911

Fix is available

Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.

[{"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Product":{"code":"SS7K4U","label":"WebSphere Application Server for z\/OS"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"7.0","Line of Business":{"code":"LOB45","label":"Automation"}}]

Document Information

Modified date:
24 October 2021

Tips

PK97531: NULLPOINTEREXCEPTION ENCOUNTERED WHEN ACCESSING AN ARD JSP FOR THE SECOND TIME

Fixes are available

Subscribe

APAR status

Closed as program error.

Error description

Local fix

Problem summary

Problem conclusion

Temporary fix

Comments

APAR Information

APAR number

Reported component name

Reported component ID

Reported release

Status

PE

HIPER

Special Attention

Submitted date

Closed date

Last modified date

APAR is sysrouted FROM one or more of the following:

APAR is sysrouted TO one or more of the following:

Fix information

Fixed component name

Fixed component ID

Applicable component levels

R700 PSY UK51554

Fix is available

Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.

Document Information

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