Eclipselink log levels issue with weak references

Hi all,
Is it possible to get null pointer exceptions if the log level in eclipselink is set to FINEST and you are logging a weak reference probably in a IdentityWeakReferenceMap and getting a null pointer exception because the weak ref has been garbage collected ?
-Prashanth.

I am getting Nullpointer exception when I set log level to FINER or FINEST in persistence.xml.
DisRootEntityRef entity which is seen in below log has week reference in erml.
Here is the exception full trace:
EL Warning: 2010-05-31 17:06:52.328--UnitOfWork(19025200)--Thread(Thread[)--java.lang.NullPointerException
at oracle.communications.platform.entity.impl.DisRootEntityRefDAO.getRootEntity(DisRootEntityRefDAO.java:300)
at oracle.communications.platform.entity.impl.DisRootEntityRefDAO.getToString(DisRootEntityRefDAO.java:591)
at oracle.communications.platform.entity.impl.DisRootEntityRefDAO.toString(DisRootEntityRefDAO.java:584)
at java.text.MessageFormat.subformat(MessageFormat.java:1246)
at java.text.MessageFormat.format(MessageFormat.java:836)
at java.text.Format.format(Format.java:140)
at java.text.MessageFormat.format(MessageFormat.java:812)
at org.eclipse.persistence.internal.localization.EclipseLinkLocalization.buildMessage(EclipseLinkLocalization.java:77)
at org.eclipse.persistence.internal.localization.TraceLocalization.buildMessage(TraceLocalization.java:30)
at org.eclipse.persistence.logging.AbstractSessionLog.formatMessage(AbstractSessionLog.java:801)
at org.eclipse.persistence.platform.server.ServerLog.log(ServerLog.java:71)
at org.eclipse.persistence.internal.sessions.AbstractSession.log(AbstractSession.java:2571)
at org.eclipse.persistence.internal.sessions.AbstractSession.log(AbstractSession.java:3664)
at org.eclipse.persistence.internal.sessions.AbstractSession.log(AbstractSession.java:3636)
at org.eclipse.persistence.internal.sessions.AbstractSession.log(AbstractSession.java:3612)
at org.eclipse.persistence.internal.sessions.AbstractSession.log(AbstractSession.java:3534)
at org.eclipse.persistence.internal.sessions.UnitOfWorkImpl.logDebugMessage(UnitOfWorkImpl.java:5397)
at org.eclipse.persistence.internal.sessions.UnitOfWorkImpl.registerExistingObject(UnitOfWorkImpl.java:3874)
at org.eclipse.persistence.internal.sessions.UnitOfWorkImpl.registerExistingObject(UnitOfWorkImpl.java:3844)
at org.eclipse.persistence.queries.ObjectBuildingQuery.registerIndividualResult(ObjectBuildingQuery.java:362)
at org.eclipse.persistence.internal.descriptors.ObjectBuilder.buildWorkingCopyCloneNormally(ObjectBuilder.java:588)
at org.eclipse.persistence.internal.descriptors.ObjectBuilder.buildObjectInUnitOfWork(ObjectBuilder.java:549)
at org.eclipse.persistence.internal.descriptors.ObjectBuilder.buildObject(ObjectBuilder.java:489)
at org.eclipse.persistence.internal.descriptors.ObjectBuilder.buildObject(ObjectBuilder.java:441)
at org.eclipse.persistence.queries.ObjectLevelReadQuery.buildObject(ObjectLevelReadQuery.java:635)
at org.eclipse.persistence.queries.ReadAllQuery.registerResultInUnitOfWork(ReadAllQuery.java:838)
at org.eclipse.persistence.queries.ReadAllQuery.executeObjectLevelReadQuery(ReadAllQuery.java:464)
at org.eclipse.persistence.queries.ObjectLevelReadQuery.executeDatabaseQuery(ObjectLevelReadQuery.java:997)
at org.eclipse.persistence.queries.DatabaseQuery.execute(DatabaseQuery.java:670)
at org.eclipse.persistence.queries.ObjectLevelReadQuery.execute(ObjectLevelReadQuery.java:958)
at org.eclipse.persistence.queries.ReadAllQuery.execute(ReadAllQuery.java:432)
at org.eclipse.persistence.queries.ObjectLevelReadQuery.executeInUnitOfWork(ObjectLevelReadQuery.java:1021)
at org.eclipse.persistence.internal.sessions.UnitOfWorkImpl.internalExecuteQuery(UnitOfWorkImpl.java:2858)
at org.eclipse.persistence.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1225)
at org.eclipse.persistence.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1207)
at org.eclipse.persistence.internal.indirection.QueryBasedValueHolder.instantiate(QueryBasedValueHolder.java:85)
at org.eclipse.persistence.internal.indirection.QueryBasedValueHolder.instantiate(QueryBasedValueHolder.java:75)
at org.eclipse.persistence.internal.indirection.DatabaseValueHolder.getValue(DatabaseValueHolder.java:83)
at org.eclipse.persistence.internal.indirection.UnitOfWorkValueHolder.instantiateImpl(UnitOfWorkValueHolder.java:161)
at org.eclipse.persistence.internal.indirection.UnitOfWorkValueHolder.instantiate(UnitOfWorkValueHolder.java:230)
at org.eclipse.persistence.internal.indirection.DatabaseValueHolder.getValue(DatabaseValueHolder.java:83)
at org.eclipse.persistence.indirection.IndirectList.buildDelegate(IndirectList.java:237)
at org.eclipse.persistence.indirection.IndirectList.getDelegate(IndirectList.java:397)
at org.eclipse.persistence.indirection.IndirectList$1.(IndirectList.java:525)
at org.eclipse.persistence.indirection.IndirectList.listIterator(IndirectList.java:524)
at org.eclipse.persistence.indirection.IndirectList.iterator(IndirectList.java:488)
at oracle.communications.platform.persistence.impl.PomsArrayList.iterator(PomsArrayList.java:598)
at oracle.communications.platform.entity.impl.DisResultGroupDAO.getRootEntities(DisResultGroupDAO.java:765)
at oracle.communications.integrity.scanCartridges.sdk.RootEntityLoaderImpl.(RootEntityLoaderImpl.java:37)
at oracle.communications.integrity.scanCartridges.sdk.BaseDiscrepancyDetectionController.init(BaseDiscrepancyDetectionController.java:71)
at oracle.communications.integrity.scanCartridges.sdk.BaseDiscrepancyDetectionController.invoke(BaseDiscrepancyDetectionController.java:41)
at oracle.communications.integrity.cartridges.ciscoextensioncartridge.detectionplugins.ciscodiscrepancydetectionsample.CiscoDiscrepancyDetectionSampleMessageDrivenBean.onMessage(CiscoDiscrepancyDetectionSampleMessageDrivenBean.java:109)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.bea.core.repackaged.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:310)
at com.bea.core.repackaged.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:182)
at com.bea.core.repackaged.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:149)
at com.bea.core.repackaged.springframework.aop.support.DelegatingIntroductionInterceptor.doProceed(DelegatingIntroductionInterceptor.java:131)
at com.bea.core.repackaged.springframework.aop.support.DelegatingIntroductionInterceptor.invoke(DelegatingIntroductionInterceptor.java:119)
at com.bea.core.repackaged.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
at com.bea.core.repackaged.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:89)
at com.bea.core.repackaged.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
at com.bea.core.repackaged.springframework.aop.support.DelegatingIntroductionInterceptor.doProceed(DelegatingIntroductionInterceptor.java:131)
at com.bea.core.repackaged.springframework.aop.support.DelegatingIntroductionInterceptor.invoke(DelegatingIntroductionInterceptor.java:119)
at com.bea.core.repackaged.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
at com.bea.core.repackaged.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
at $Proxy343.onMessage(Unknown Source)
at weblogic.ejb.container.internal.MDListener.execute(MDListener.java:466)
at weblogic.ejb.container.internal.MDListener.transactionalOnMessage(MDListener.java:371)
at weblogic.ejb.container.internal.MDListener.onMessage(MDListener.java:327)
at weblogic.jms.client.JMSSession.onMessage(JMSSession.java:4585)
at weblogic.jms.client.JMSSession.execute(JMSSession.java:4271)
at weblogic.jms.client.JMSSession.executeMessage(JMSSession.java:3747)
at weblogic.jms.client.JMSSession.access$000(JMSSession.java:114)
at weblogic.jms.client.JMSSession$UseForRunnable.run(JMSSession.java:5096)
at weblogic.work.SelfTuningWorkManagerImpl$WorkAdapterImpl.run(SelfTuningWorkManagerImpl.java:516)
at weblogic.work.ExecuteThread.execute(ExecuteThread.java:201)
at weblogic.work.ExecuteThread.run(ExecuteThread.java:173)
oracle.communications.integrity.cartridges.ciscoextensioncartridge.detectionplugins.ciscodiscrepancydetectionsample.CiscoDiscrepancyDetectionSampleMessageDrivenBean
java.lang.NullPointerException
at oracle.communications.platform.entity.impl.DisRootEntityRefDAO.getRootEntity(DisRootEntityRefDAO.java:300)
at oracle.communications.platform.entity.impl.DisRootEntityRefDAO.getToString(DisRootEntityRefDAO.java:591)
at oracle.communications.platform.entity.impl.DisRootEntityRefDAO.toString(DisRootEntityRefDAO.java:584)
at java.text.MessageFormat.subformat(MessageFormat.java:1246)
at java.text.MessageFormat.format(MessageFormat.java:836)
at java.text.Format.format(Format.java:140)
at java.text.MessageFormat.format(MessageFormat.java:812)
at org.eclipse.persistence.internal.localization.EclipseLinkLocalization.buildMessage(EclipseLinkLocalization.java:77)
at org.eclipse.persistence.internal.localization.TraceLocalization.buildMessage(TraceLocalization.java:30)
at org.eclipse.persistence.logging.AbstractSessionLog.formatMessage(AbstractSessionLog.java:801)
at org.eclipse.persistence.platform.server.ServerLog.log(ServerLog.java:71)
at org.eclipse.persistence.internal.sessions.AbstractSession.log(AbstractSession.java:2571)
at org.eclipse.persistence.internal.sessions.AbstractSession.log(AbstractSession.java:3664)
at org.eclipse.persistence.internal.sessions.AbstractSession.log(AbstractSession.java:3636)
at org.eclipse.persistence.internal.sessions.AbstractSession.log(AbstractSession.java:3612)
at org.eclipse.persistence.internal.sessions.AbstractSession.log(AbstractSession.java:3534)
at org.eclipse.persistence.internal.sessions.UnitOfWorkImpl.logDebugMessage(UnitOfWorkImpl.java:5397)
at org.eclipse.persistence.internal.sessions.UnitOfWorkImpl.registerExistingObject(UnitOfWorkImpl.java:3874)
at org.eclipse.persistence.internal.sessions.UnitOfWorkImpl.registerExistingObject(UnitOfWorkImpl.java:3844)
at org.eclipse.persistence.queries.ObjectBuildingQuery.registerIndividualResult(ObjectBuildingQuery.java:362)
at org.eclipse.persistence.internal.descriptors.ObjectBuilder.buildWorkingCopyCloneNormally(ObjectBuilder.java:588)
at org.eclipse.persistence.internal.descriptors.ObjectBuilder.buildObjectInUnitOfWork(ObjectBuilder.java:549)
at org.eclipse.persistence.internal.descriptors.ObjectBuilder.buildObject(ObjectBuilder.java:489)
at org.eclipse.persistence.internal.descriptors.ObjectBuilder.buildObject(ObjectBuilder.java:441)
at org.eclipse.persistence.queries.ObjectLevelReadQuery.buildObject(ObjectLevelReadQuery.java:635)
at org.eclipse.persistence.queries.ReadAllQuery.registerResultInUnitOfWork(ReadAllQuery.java:838)
at org.eclipse.persistence.queries.ReadAllQuery.executeObjectLevelReadQuery(ReadAllQuery.java:464)
at org.eclipse.persistence.queries.ObjectLevelReadQuery.executeDatabaseQuery(ObjectLevelReadQuery.java:997)
at org.eclipse.persistence.queries.DatabaseQuery.execute(DatabaseQuery.java:670)
at org.eclipse.persistence.queries.ObjectLevelReadQuery.execute(ObjectLevelReadQuery.java:958)
at org.eclipse.persistence.queries.ReadAllQuery.execute(ReadAllQuery.java:432)
at org.eclipse.persistence.queries.ObjectLevelReadQuery.executeInUnitOfWork(ObjectLevelReadQuery.java:1021)
at org.eclipse.persistence.internal.sessions.UnitOfWorkImpl.internalExecuteQuery(UnitOfWorkImpl.java:2858)
at org.eclipse.persistence.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1225)
at org.eclipse.persistence.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1207)
at org.eclipse.persistence.internal.indirection.QueryBasedValueHolder.instantiate(QueryBasedValueHolder.java:85)
at org.eclipse.persistence.internal.indirection.QueryBasedValueHolder.instantiate(QueryBasedValueHolder.java:75)
at org.eclipse.persistence.internal.indirection.DatabaseValueHolder.getValue(DatabaseValueHolder.java:83)
at org.eclipse.persistence.internal.indirection.UnitOfWorkValueHolder.instantiateImpl(UnitOfWorkValueHolder.java:161)
at org.eclipse.persistence.internal.indirection.UnitOfWorkValueHolder.instantiate(UnitOfWorkValueHolder.java:230)
at org.eclipse.persistence.internal.indirection.DatabaseValueHolder.getValue(DatabaseValueHolder.java:83)
at org.eclipse.persistence.indirection.IndirectList.buildDelegate(IndirectList.java:237)
at org.eclipse.persistence.indirection.IndirectList.getDelegate(IndirectList.java:397)
at org.eclipse.persistence.indirection.IndirectList$1.(IndirectList.java:525)
at org.eclipse.persistence.indirection.IndirectList.listIterator(IndirectList.java:524)
at org.eclipse.persistence.indirection.IndirectList.iterator(IndirectList.java:488)
at oracle.communications.platform.persistence.impl.PomsArrayList.iterator(PomsArrayList.java:598)
at oracle.communications.platform.entity.impl.DisResultGroupDAO.getRootEntities(DisResultGroupDAO.java:765)
at oracle.communications.integrity.scanCartridges.sdk.RootEntityLoaderImpl.(RootEntityLoaderImpl.java:37)
at oracle.communications.integrity.scanCartridges.sdk.BaseDiscrepancyDetectionController.init(BaseDiscrepancyDetectionController.java:71)
at oracle.communications.integrity.scanCartridges.sdk.BaseDiscrepancyDetectionController.invoke(BaseDiscrepancyDetectionController.java:41)
at oracle.communications.integrity.cartridges.ciscoextensioncartridge.detectionplugins.ciscodiscrepancydetectionsample.CiscoDiscrepancyDetectionSampleMessageDrivenBean.onMessage(CiscoDiscrepancyDetectionSampleMessageDrivenBean.java:109)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.bea.core.repackaged.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:310)
at com.bea.core.repackaged.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:182)
at com.bea.core.repackaged.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:149)
at com.bea.core.repackaged.springframework.aop.support.DelegatingIntroductionInterceptor.doProceed(DelegatingIntroductionInterceptor.java:131)
at com.bea.core.repackaged.springframework.aop.support.DelegatingIntroductionInterceptor.invoke(DelegatingIntroductionInterceptor.java:119)
at com.bea.core.repackaged.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
at com.bea.core.repackaged.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:89)
at com.bea.core.repackaged.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
at com.bea.core.repackaged.springframework.aop.support.DelegatingIntroductionInterceptor.doProceed(DelegatingIntroductionInterceptor.java:131)
at com.bea.core.repackaged.springframework.aop.support.DelegatingIntroductionInterceptor.invoke(DelegatingIntroductionInterceptor.java:119)
at com.bea.core.repackaged.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
at com.bea.core.repackaged.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
at $Proxy343.onMessage(Unknown Source)
at weblogic.ejb.container.internal.MDListener.execute(MDListener.java:466)
at weblogic.ejb.container.internal.MDListener.transactionalOnMessage(MDListener.java:371)
at weblogic.ejb.container.internal.MDListener.onMessage(MDListener.java:327)
at weblogic.jms.client.JMSSession.onMessage(JMSSession.java:4585)
at weblogic.jms.client.JMSSession.execute(JMSSession.java:4271)
at weblogic.jms.client.JMSSession.executeMessage(JMSSession.java:3747)
at weblogic.jms.client.JMSSession.access$000(JMSSession.java:114)
at weblogic.jms.client.JMSSession$UseForRunnable.run(JMSSession.java:5096)
at weblogic.work.SelfTuningWorkManagerImpl$WorkAdapterImpl.run(SelfTuningWorkManagerImpl.java:516)
at weblogic.work.ExecuteThread.execute(ExecuteThread.java:201)
at weblogic.work.ExecuteThread.run(ExecuteThread.java:173)

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