Miloud Haimoune [https://community.jboss.org/people/milhaim] created the discussion "timer job Exception" To view the discussion, visit: https://community.jboss.org/message/754050#754050 -------------------------------------------------------------- Hi all, I m using JBPM 5.3 in a web application with jboss server  5.1 I discovered this exception in the logs: javax.persistence.TransactionRequiredException: No active JTA transaction on joinTransaction call     at org.hibernate.ejb.AbstractEntityManagerImpl.joinTransaction(AbstractEntityManagerImpl.java:458)     at org.hibernate.ejb.AbstractEntityManagerImpl.joinTransaction(AbstractEntityManagerImpl.java:431)     at org.drools.persistence.jpa.JpaPersistenceContext.joinTransaction(JpaPersistenceContext.java:29)     at org.drools.persistence.SingleSessionCommandService.execute(SingleSessionCommandService.java:349)     at org.drools.persistence.jpa.JpaTimerJobInstance.call(JpaTimerJobInstance.java:34)     at org.drools.persistence.jpa.JpaTimerJobInstance.call(JpaTimerJobInstance.java:14)     at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)     at java.util.concurrent.FutureTask.run(FutureTask.java:138)     at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:98)     at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:206)     at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)     at java.lang.Thread.run(Thread.java:680) 16:03:57,751 ERROR [JpaTimerJobInstance] Unable to execute timer job! it happens from time to time, I can not see any directly related cause, do you have any idea where this coming from and how to fix it ? Many thanks -------------------------------------------------------------- Reply to this message by going to Community [https://community.jboss.org/message/754050#754050] Start a new discussion in jBPM at Community [https://community.jboss.org/choose-container!input.jspa?contentType=1&...]