PK80004: EJPEJ0066E: THE PORTLET COULD NOT BE RENDERED. JAVA.UTIL.CONCURRENTMODIFICATIONEXCEPTION

Fixes are available

APAR status

Closed as program error.

Error description

The customer received ConcurrentModificationException with
Portal 6.1 server running in WebSphere.
ConcurrentModificationException:
   ExtendedMessage: EJPEJ0066E: The portlet could not be
   rendered. java.util.ConcurrentModificationException
     at
java.util.LinkedList$ListItr.checkForComodification(LinkedList.j
ava:632)
     at java.util.LinkedList$ListItr.next(LinkedList.java:567)
     at com.ibm.ws.portletcontainer.
                  PortletContainerInvokerCollaboratorChainImpl
     at com.ibm.ws.portletcontainer.pcinvoker.
          PortletInvokerImpl$2.run(PortletInvokerImpl.java:100)
     at java.security.AccessController.doPrivileged
                              (AccessController.java:246)
     at com.ibm.ws.portletcontainer.pcinvoker.
    PortletInvokerImpl.invokeRender(PortletInvokerImpl.java:96)
...

Local fix

Problem summary

****************************************************************
* USERS AFFECTED:  All users of IBM WebSphere Application      *
*                  Server V7.0                                 *
****************************************************************
* PROBLEM DESCRIPTION: Multi-threading issue during portlet    *
*                      container initialization.               *
****************************************************************
* RECOMMENDATION:                                              *
****************************************************************
When the portlet container of the application server receives
many simultaneous requests at server startup, the
container will not initialize properly and
ConcurrentModificationExceptions will be reported in the logs.
This is due to multiple threads trying to manipulate the list
of
collaborators at the same time.

Stack tracs:
ConcurrentModificationException:
ExtendedMessage: EJPEJ0066E: The portlet could not be
rendered. java.util.ConcurrentModificationException
at
java.util.LinkedList$ListItr.checkForComodification(LinkedList.j
ava:632)
at java.util.LinkedList$ListItr.next(LinkedList.java:567)
at com.ibm.ws.portletcontainer.
PortletContainerInvokerCollaboratorChainImpl
at com.ibm.ws.portletcontainer.pcinvoker.
PortletInvokerImpl$2.run(PortletInvokerImpl.java:100)
at java.security.AccessController.doPrivileged
(AccessController.java:246)
at com.ibm.ws.portletcontainer.pcinvoker.
PortletInvokerImpl.invokeRender(PortletInvokerImpl.java:96)
...

Problem conclusion

Additional synchronization points have been introduced to make
sure that only one thread at a time can modify the list of
collaborators.

APAR PK80004 is currently targeted for inclusion in
Service Level (Fix Pack) 7.0.0.5 of WebSphere
Application Server.

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
PK80004
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
2009-02-04
Closed date
2009-05-14
Last modified date
2009-08-03

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
WEBSPHERE FOR Z
Fixed component ID
5655I3500

Applicable component levels

R700 PSY UK48200
UP09/07/27 P F907

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

PK80004: EJPEJ0066E: THE PORTLET COULD NOT BE RENDERED. JAVA.UTIL.CONCURRENTMODIFICATIONEXCEPTION

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 UK48200

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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