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java.lang.NullPointerException at java.util.Hashtable.remove(Hashtable.java:421) at weblogic.connector.common.internal.LocalTransResourceFactory.delistConnection(LocalTransResourceFactory.java:112) at weblogic.connector.common.internal.LocalTransResourceFactory.access$0(LocalTransResourceFactory.java:105) at weblogic.connector.common.internal.LocalTransResourceFactory$ConnectionEventListenerImpl.connectionClosed(LocalTransResourceFactory.java:167) at com.persistence.turbo.ra.ManagedConnectionImpl.close(ManagedConnectionImpl.java:88) at com.persistence.turbo.ra.ConnectionImpl.close(ConnectionImpl.java:18) at java.lang.reflect.Method.invoke(Native Method) at weblogic.connector.common.internal.ConnectionWrapper.invoke(ConnectionWrapper.java:59) at $Proxy106.close(Unknown Source) at examples.jconnector.persistence.AccountBean.cleanup(AccountBean.java:381) at examples.jconnector.persistence.AccountBean.ejbFindByPrimaryKey(AccountBean.java:251) at examples.jconnector.persistence.AccountBean_jconnector_Impl.ejbFindByPrimaryKey(AccountBean_jconnector_Impl.java:192) at java.lang.reflect.Method.invoke(Native Method) at weblogic.ejb20.manager.BeanManagedPersistenceManager.findByPrimaryKey(BeanManagedPersistenceManager.java:35) at weblogic.ejb20.manager.BaseEntityManager.findByPrimaryKey(BaseEntityManager.java:458) at weblogic.ejb20.manager.BaseEntityManager.remoteFindByPrimaryKey(BaseEntityManager.java:395) at weblogic.ejb20.internal.EntityEJBHome.findByPrimaryKey(EntityEJBHome.java:354) at examples.jconnector.persistence.AccountBean_jconnector_HomeImpl.findByPrimaryKey(AccountBean_jconnector_HomeImpl.java:101) at examples.jconnector.persistence.AccountBean_jconnector_HomeImpl_WLSkel.invoke(UnknownSource) at weblogic.rmi.internal.BasicServerRef.invoke(BasicServerRef.java:266) at weblogic.rmi.cluster.ReplicaAwareServerRef.invoke(ReplicaAwareServerRef.java:96) at weblogic.rmi.internal.BasicServerRef.handleRequest(BasicServerRef.java:233) at weblogic.rmi.internal.BasicExecuteRequest.execute(BasicExecuteRequest.java:22) at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:137) at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:120)