NPE thrown while launching AK Pages from Apps Homepage

Question

Hi,
Tech. Stack
Product/Component Version
OA Framework 11.5.10 3CU
Oracle Applications Extension 9.0.3.8.13 - build 1372
Business Components 9.0.3.13.87
UIX (Cabo) 2_2_22
BiBeans Runtime 3.1.0.70 nondebug BI Beans OAF 11.5.10 Production Release
MDS 9.0.5.4.89_554
XML Oracle XDK Java 9.0.4.0.0 Production
AOL/J Applications Object Library, Core Java Roll Up Patch J
Servlet 2.2
Java 1.4.2_04
JDBC Driver 9.2.0.6.0
Database Oracle Database 10g Enterprise Edition Release 10.1.0.4.0 - Prod
Operating System Linux 2.4.21-27.0.2.1.7.ELhugemem
Browser Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 2.0.50727; .NET CLR 1.1.4322)
Issue
NPE is thrown while launching pages (tied to resp. menu) from the Apps Home Page. Also occurs while accessing the workflow notifications.
Exception Stack
oracle.apps.fnd.framework.OAException: Application: FND, Message Name: FND_GENERIC_MESSAGE. Tokens: MESSAGE = java.lang.NullPointerException;
     at oracle.apps.fnd.framework.OAException.wrapperException(OAException.java:891)
     at oracle.apps.fnd.framework.webui.OAPageErrorHandler.prepareException(OAPageErrorHandler.java:1145)
     at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(OAPageBean.java:1959)
     at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(OAPageBean.java:501)
     at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(OAPageBean.java:422)
## Detail 0 ##
java.lang.NullPointerException
     at oracle.jbo.pcoll.PCollManager.register(PCollManager.java:495)
     at oracle.jbo.pcoll.PCollection.<init>(PCollection.java:94)
     at oracle.jbo.pcoll.PCollManager.createCollection(PCollManager.java:403)
     at oracle.jbo.pcoll.PCollManager.createCollection(PCollManager.java:410)
     at oracle.jbo.server.QueryCollection.initQC(QueryCollection.java:172)
     at oracle.jbo.server.QueryCollection.<init>(QueryCollection.java:113)
     at oracle.jbo.server.ViewRowSetImpl.initQueryCollection(ViewRowSetImpl.java:413)
     at oracle.jbo.server.ViewRowSetImpl.execute(ViewRowSetImpl.java:567)
     at oracle.jbo.server.ViewRowSetImpl.execute(ViewRowSetImpl.java:544)
     at oracle.jbo.server.ViewRowSetImpl.executeDetailQuery(ViewRowSetImpl.java:619)
     at oracle.jbo.server.ViewObjectImpl.executeDetailQuery(ViewObjectImpl.java:3311)
     at oracle.jbo.server.ViewObjectImpl.executeQuery(ViewObjectImpl.java:3298)
     at oracle.apps.fnd.framework.server.OAViewObjectImpl.executeQuery(OAViewObjectImpl.java:444)
     at oracle.apps.fnd.framework.webui.OAWebBeanFactoryImpl.getAppShortName(OAWebBeanFactoryImpl.java:5359)
     at oracle.apps.fnd.framework.webui.OAWebBeanFactoryImpl.getWebBeanTypeDataFromJRAD(OAWebBeanFactoryImpl.java:3720)
     at oracle.apps.fnd.framework.webui.OAWebBeanFactoryImpl.getRootApplicationModuleClass(OAWebBeanFactoryImpl.java:3460)
     at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(OAPageBean.java:992)
     at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(OAPageBean.java:501)
     at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(OAPageBean.java:422)
     at oa_html._OA._jspService(_OA.java:88)
Observations
This behavior is intermittent and occurs only while launching the Pages that point to the AK Regions. OAF Pages work fine.
Bouncing the Middle tier, resolves the issue for now. But crops up again in a few days.
It happens only in one instance, the other instances are working fine. All of them equate for tech-stack level.
Code Insight
Seems like the PCollManager.mCols is null. This is set to null only while releasing the connection.
Not sure as to how the connection gets released here. If this is the case, why is it happening only in this instance?
Also how does it work fine for other OAF Pages?
Thanks,
Srinath Mani.

Answer 1

Hi Mani,
Recommend you try the OA Framework forum: OA Framework
Regards,
John