APAR status
Closed as program error.
Error description
Currently the PPR code clones the request and spawns a thread for every portlet which participates in the PPR. This is executed in the mentioned order, i. e. clone request, spawn and start thread, clone request, spawn and start thread, clone request, etc. As a consequence the threads which already started working can modify request attributes. The cloning of the request attributes (which actually is a HashMap) iterates over the attributes and if a concurrent thread modifies these attributes the ConcurrentModificationException is thrown. [1/1/11 12:00:00:000 GMT] 00006592 Servlet E com.ibm.wps.engine. Servlet handleException EJPEJ0070E: An exception occurred while processing the request. java.util.ConcurrentModificationException at java.util.HashMap$HashIterator.nextEntry(HashMap .java:841) at java.util.HashMap$EntryIterator.next(HashMap .java:883) at java.util.HashMap$EntryIterator.next(HashMap .java:881) at java.util.HashMap.putAllForCreate(HashMap.java:481) at java.util.HashMap.clone(HashMap.java:713) at com.ibm.ws.webcontainer.srt .SRTServletRequest$SRTServletRequestHelper .clone(SRTServletRequest.java:2619) at com.ibm.ws.webcontainer.srt.SRTServletRequest .clone(SRTServletRequest.java:1025) at com.ibm.wps.engine.PathHttpServletRequestWrapper .cloneDelegate(PathHttpServletRequestWrapper.java:73) at com.ibm.wps.engine.PathHttpServletRequestWrapper .<init>(PathHttpServletRequestWrapper.java:171)
Local fix
n/a
Problem summary
ConcurrentModificationException in parallel portlet rendering code.
Problem conclusion
The order described in "Error Description" will be modified such that cloning of the request happens for every thread prior to starting the threads. Manual Steps: None Failing Module(s): Portlet Container Affected Users: All users Version Information: Portal Version(s): 6.1.0.2 Pre-Requisite(s): (or the respective cumulative fix) Co-Requisite(s): --- Platform Specific: This fix applies to all platforms. A fix is available from Fix Central: http://www.ibm.com/eserver/support/fixes/fixcentral/swgquickorde r?apar=PM30718&productid=WebSphere%20Portal&brandid=5 You may need to type or paste the complete address into your Web browser.
Temporary fix
Comments
APAR Information
APAR number
PM30718
Reported component name
WEBSPHERE PORTA
Reported component ID
5724E7600
Reported release
61B
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2011-01-19
Closed date
2011-02-09
Last modified date
2011-02-09
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 PORTA
Fixed component ID
5724E7600
Applicable component levels
R61B PSY
UP
[{"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SSHRKX","label":"WebSphere Portal"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"6.1.0.2","Line of Business":{"code":"LOB31","label":"WCE Watson Marketing and Commerce"}}]
Document Information
Modified date:
21 December 2021