Sukumaran Raghavan [https://community.jboss.org/people/suku_1983] created the discussion "ORA 00060 - Deadlock while using Oracle + JBPM 5.2" To view the discussion, visit: https://community.jboss.org/message/729707#729707 -------------------------------------------------------------- Hi, I am using JBPM 5.2 for an application. I am facing issues when multiple threads complete work items parallely. These lead the process to completion and while completing, processInstanceInfo and a few other tables have DML statements executed. I use Oracle DB for the backend ! Exception trace below. Hoping someone can help. Do let me know what options i have. Things i gave tried   - Increased INITRANS for the tables to 25 (default is 1) - This usually helps in ORA-0060 errors. However not this time :( ==================== 16:17:54,389 INFO  [stdout] (EJB default - 3) Hibernate: update SessionInfo set lastModificationDate=?, rulesByteArray=?, startDate=?, OPTLOCK=? where id=? and OPTLOCK=? 16:17:54,396 INFO  [stdout] (EJB default - 4) Hibernate: insert into NodeInstanceLog (log_date, nodeId, nodeInstanceId, nodeName, processId, processInstanceId, type, id) values (?, ?, ?, ?, ?, ?, ?, ?) 16:17:54,462 INFO  [stdout] (EJB default - 3) Hibernate: insert into NodeInstanceLog (log_date, nodeId, nodeInstanceId, nodeName, processId, processInstanceId, type, id) values (?, ?, ?, ?, ?, ?, ?, ?) 16:17:54,469 INFO  [stdout] (EJB default - 4) Hibernate: insert into NodeInstanceLog (log_date, nodeId, nodeInstanceId, nodeName, processId, processInstanceId, type, id) values (?, ?, ?, ?, ?, ?, ?, ?) 16:17:54,535 INFO  [stdout] (EJB default - 3) Hibernate: insert into NodeInstanceLog (log_date, nodeId, nodeInstanceId, nodeName, processId, processInstanceId, type, id) values (?, ?, ?, ?, ?, ?, ?, ?) 16:17:54,541 INFO  [stdout] (EJB default - 4) Hibernate: insert into NodeInstanceLog (log_date, nodeId, nodeInstanceId, nodeName, processId, processInstanceId, type, id) values (?, ?, ?, ?, ?, ?, ?, ?) 16:17:54,612 INFO  [stdout] (EJB default - 3) Hibernate: insert into NodeInstanceLog (log_date, nodeId, nodeInstanceId, nodeName, processId, processInstanceId, type, id) values (?, ?, ?, ?, ?, ?, ?, ?) 16:17:54,620 INFO  [stdout] (EJB default - 4) Hibernate: update ProcessInstanceLog set end_date=?, processId=?, processInstanceId=?, start_date=? where id=? 16:17:54,684 INFO  [stdout] (EJB default - 3) Hibernate: update ProcessInstanceLog set end_date=?, processId=?, processInstanceId=?, start_date=? where id=? 16:17:54,693 INFO  [stdout] (EJB default - 4) Hibernate: delete from EventTypes where InstanceId=? 16:17:54,755 INFO  [stdout] (EJB default - 3) Hibernate: delete from EventTypes where InstanceId=? 16:17:54,765 INFO  [stdout] (EJB default - 4) Hibernate: delete from ProcessInstanceInfo where InstanceId=? and OPTLOCK=? 16:17:54,827 INFO  [stdout] (EJB default - 3) Hibernate: delete from ProcessInstanceInfo where InstanceId=? and OPTLOCK=? 16:17:58,429 WARN  [org.hibernate.engine.jdbc.spi.SqlExceptionHelper] (EJB default - 4) SQL Error: 60, SQLState: 61000 16:17:58,429 ERROR [org.hibernate.engine.jdbc.spi.SqlExceptionHelper] (EJB default - 4) ORA-00060: deadlock detected while waiting for resource 16:17:58,431 WARN  [com.arjuna.ats.arjuna] (EJB default - 4) ARJUNA012125: TwoPhaseCoordinator.beforeCompletion - failed for SynchronizationImple< 0:ffff11d11224:-5d726fdb:4f861b4f:1fd, org.hibernate.engine.transaction.synchronization.internal.RegisteredSynchronization@7c07a0c >: javax.persistence.PersistenceException: org.hibernate.exception.LockAcquisitionException: ORA-00060: deadlock detected while waiting for resource           at org.hibernate.ejb.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1361) [hibernate-entitymanager-4.0.1.Final.jar:4.0.1.Final]           at org.hibernate.ejb.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1289) [hibernate-entitymanager-4.0.1.Final.jar:4.0.1.Final]           at org.hibernate.ejb.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1295) [hibernate-entitymanager-4.0.1.Final.jar:4.0.1.Final]           at org.hibernate.ejb.AbstractEntityManagerImpl$CallbackExceptionMapperImpl.mapManagedFlushFailure(AbstractEntityManagerImpl.java:1481) [hibernate-entitymanager-4.0.1.Final.jar:4.0.1.Final]           at org.hibernate.engine.transaction.synchronization.internal.SynchronizationCallbackCoordinatorImpl.beforeCompletion(SynchronizationCallbackCoordinatorImpl.java:109) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]           at org.hibernate.engine.transaction.synchronization.internal.RegisteredSynchronization.beforeCompletion(RegisteredSynchronization.java:53) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]           at com.arjuna.ats.internal.jta.resources.arjunacore.SynchronizationImple.beforeCompletion(SynchronizationImple.java:76)           at com.arjuna.ats.arjuna.coordinator.TwoPhaseCoordinator.beforeCompletion(TwoPhaseCoordinator.java:273)           at com.arjuna.ats.arjuna.coordinator.TwoPhaseCoordinator.end(TwoPhaseCoordinator.java:93)           at com.arjuna.ats.arjuna.AtomicAction.commit(AtomicAction.java:164)           at com.arjuna.ats.internal.jta.transaction.arjunacore.TransactionImple.commitAndDisassociate(TransactionImple.java:1165)           at com.arjuna.ats.internal.jta.transaction.arjunacore.BaseTransaction.commit(BaseTransaction.java:117)           at com.arjuna.ats.jbossatx.BaseTransactionManagerDelegate.commit(BaseTransactionManagerDelegate.java:75)           at org.jboss.as.ejb3.tx.CMTTxInterceptor.endTransaction(CMTTxInterceptor.java:92) [jboss-as-ejb3-7.1.0.Final.jar:7.1.0.Final]           at org.jboss.as.ejb3.tx.CMTTxInterceptor.invokeInOurTx(CMTTxInterceptor.java:232) [jboss-as-ejb3-7.1.0.Final.jar:7.1.0.Final]           at org.jboss.as.ejb3.tx.CMTTxInterceptor.required(CMTTxInterceptor.java:304) [jboss-as-ejb3-7.1.0.Final.jar:7.1.0.Final]           at org.jboss.as.ejb3.tx.CMTTxInterceptor.processInvocation(CMTTxInterceptor.java:190) [jboss-as-ejb3-7.1.0.Final.jar:7.1.0.Final]           at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288) [jboss-invocation-1.1.1.Final.jar:1.1.1.Final]           at org.jboss.as.ejb3.component.interceptors.CurrentInvocationContextInterceptor.processInvocation(CurrentInvocationContextInterceptor.java:41) [jboss-as-ejb3-7.1.0.Final.jar:7.1.0.Final]           at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288) [jboss-invocation-1.1.1.Final.jar:1.1.1.Final]           at org.jboss.as.ejb3.component.interceptors.LoggingInterceptor.processInvocation(LoggingInterceptor.java:59) [jboss-as-ejb3-7.1.0.Final.jar:7.1.0.Final]           at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288) [jboss-invocation-1.1.1.Final.jar:1.1.1.Final]           at org.jboss.as.ee.component.NamespaceContextInterceptor.processInvocation(NamespaceContextInterceptor.java:50) [jboss-as-ee-7.1.0.Final.jar:7.1.0.Final]           at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288) [jboss-invocation-1.1.1.Final.jar:1.1.1.Final]           at org.jboss.as.ee.component.TCCLInterceptor.processInvocation(TCCLInterceptor.java:45) [jboss-as-ee-7.1.0.Final.jar:7.1.0.Final]           at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288) [jboss-invocation-1.1.1.Final.jar:1.1.1.Final]           at org.jboss.invocation.ChainedInterceptor.processInvocation(ChainedInterceptor.java:61) [jboss-invocation-1.1.1.Final.jar:1.1.1.Final]           at org.jboss.as.ee.component.ViewService$View.invoke(ViewService.java:165) [jboss-as-ee-7.1.0.Final.jar:7.1.0.Final]           at org.jboss.as.ee.component.ViewDescription$1.processInvocation(ViewDescription.java:173) [jboss-as-ee-7.1.0.Final.jar:7.1.0.Final]           at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288) [jboss-invocation-1.1.1.Final.jar:1.1.1.Final]           at org.jboss.as.ejb3.component.interceptors.AsyncVoidInterceptorFactory$Task.run(AsyncVoidInterceptorFactory.java:75) [jboss-as-ejb3-7.1.0.Final.jar:7.1.0.Final]           at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) [classes.jar:1.6.0_26]           at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) [classes.jar:1.6.0_26]           at java.lang.Thread.run(Thread.java:680) [classes.jar:1.6.0_26]           at org.jboss.threads.JBossThread.run(JBossThread.java:122) Caused by: org.hibernate.exception.LockAcquisitionException: ORA-00060: deadlock detected while waiting for resource -------------------------------------------------------------- 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