Thread Locks In WebCenter Spaces Using Poll Taskflow

(Doc ID 1478590.1)

Last updated on DECEMBER 21, 2012

Applies to:

Oracle WebCenter Portal - Version 11.1.1.5.0 to 11.1.1.6.0 [Release 11g]
Information in this document applies to any platform.

Symptoms

When adding a Poll taskflow to the home page, it generates a thread locking or stuck threads, system locks up and needs to be restarted.

All threads locked in WebCenter Spaces server on "concurrencymanager.acquire" if the Poll Taskflow is added to the Spaces Home Page. This happens over time or load on the system.


Spaces thread dump shows the following:

 

"[STUCK] ExecuteThread: '0' for queue: 'weblogic.kernel.Default
(self-tuning)'" id=20 idx=0x64 tid=9303 prio=1 alive, waiting,
native_blocked, daemon
   -- Waiting for notification on:
org/eclipse/persistence/internal/helper/ConcurrencyManager@0x12b452f88[fat lock]
   at jrockit/vm/Threads.waitForNotifySignal(JLjava/lang/Object;)Z(Native Method)
   at jrockit/vm/Locks.wait(Locks.java:1973)[inlined]
   at java/lang/Object.wait(Object.java:485)[optimized]
   at
org/eclipse/persistence/internal/helper/ConcurrencyManager.acquire(ConcurrencyManager.java:93)
   ^-- Lock released while waiting:
org/eclipse/persistence/internal/helper/ConcurrencyManager@0x12b452f88[fat lock]
   at org/eclipse/persistence/internal/identitymaps/CacheKey.acquire(CacheKey.java:113)
   at org/eclipse/persistence/internal/identitymaps/AbstractIdentityMap.acquireLock(AbstractIdentityMap.java:107)
   at org/eclipse/persistence/internal/identitymaps/IdentityMapManager.acquireLock(IdentityMapManager.java:133)
   at org/eclipse/persistence/internal/sessions/IdentityMapAccessor.acquireLock(IdentityMapAccessor.java:92)
   at org/eclipse/persistence/internal/sessions/IdentityMapAccessor.acquireLock(IdentityMapAccessor.java:83[inlined]
   at org/eclipse/persistence/internal/descriptors/ObjectBuilder.buildObject(ObjectBuilder.java:698)[inlined]
   at org/eclipse/persistence/internal/descriptors/ObjectBuilder.buildWorkingCopyCloneNormally(ObjectBuilder.java:616)[inlined]
   at org/eclipse/persistence/internal/descriptors/ObjectBuilder.buildObjectInUnitOfWork(ObjectBuilder.java:569)[optimized]
   at org/eclipse/persistence/internal/descriptors/ObjectBuilder.buildObject(ObjectBuilder.java:502)[optimized]
   at org/eclipse/persistence/internal/descriptors/ObjectBuilder.buildObject(ObjectBuilder.java:454)[inlined]
   at org/eclipse/persistence/queries/ObjectLevelReadQuery.buildObject(ObjectLevelReadQuery.java:723)[optimized]
   at org/eclipse/persistence/queries/ReadAllQuery.registerResultInUnitOfWork(ReadAllQuery.java:738)[inlined]
   at org/eclipse/persistence/queries/ReadAllQuery.executeObjectLevelReadQuery(ReadAllQuery.java:420)[optimized]
   at org/eclipse/persistence/queries/ObjectLevelReadQuery.executeDatabaseQuery(ObjectLevelReadQuery.java:1076)[optimized]
   at org/eclipse/persistence/queries/DatabaseQuery.execute(DatabaseQuery.java:740)[inlined]
   at org/eclipse/persistence/queries/ObjectLevelReadQuery.execute(ObjectLevelReadQuery.java:1036)[optimized]
   at org/eclipse/persistence/queries/ReadAllQuery.execute(ReadAllQuery.java:380)
   at org/eclipse/persistence/queries/ObjectLevelReadQuery.executeInUnitOfWork(ObjectLevelReadQuery.java:1122)[optimized]
   at org/eclipse/persistence/internal/sessions/UnitOfWorkImpl.internalExecuteQuery(UnitOfWorkImpl.java:2910)
   at org/eclipse/persistence/internal/sessions/AbstractSession.executeQuery(AbstractSession.java:1291)
   at org/eclipse/persistence/internal/sessions/AbstractSession.executeQuery(AbstractSession.java:1273)
   at org/eclipse/persistence/internal/sessions/AbstractSession.executeQuery(AbstractSession.java:1247)[optimized]
   at org/eclipse/persistence/internal/jpa/EJBQueryImpl.executeReadQuery(EJBQueryImpl.java:479)
   at org/eclipse/persistence/internal/jpa/EJBQueryImpl.getResultList(EJBQueryImpl.java:714)[optimized]
   at oracle/webcenter/collab/survey/internal/toplink/JPASurveySession.getAvailableSurveys(JPASurveySession.java:498)[optimized]
   at oracle/webcenter/collab/survey/ProxySurveySession.getAvailableSurveys(ProxySurveySession.java:262)[optimized]
   at oracle/webcenter/collab/survey/view/bean/TakeSurveyBean.getAvailableSurveys(TakeSurveyBean.java:219)
   at oracle/webcenter/collab/survey/view/bean/TakeSurveyBean.getCurrentSurvey(TakeSurveyBean.java:368)
   at oracle/webcenter/collab/survey/view/bean/TakeSurveyBean.isCompleted(TakeSurveyBean.java:658)
   at oracle/webcenter/collab/survey/view/bean/TakeSurveyBean.router(TakeSurveyBean.java:158)
   at sun/reflect/GeneratedMethodAccessor39778.invoke(Ljava/lang/Object;[Ljava/lang/Object;)Ljava/lang/Object;(Unknown Source)
   at sun/reflect/DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)[optimized]
   at java/lang/reflect/Method.invoke(Method.java:597)[optimized]
   (...)"

 

Cause

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