org.hibernate.StaleObjectStateException: Row was updated or deleted by another transaction (or unsaved-value mapping was incorrect): org.jbpm.graph.exe.Token#17
at org.hibernate.persister.entity.AbstractEntityPersister.forceVersionIncrement(AbstractEntityPersister.java:1239)
at org.hibernate.event.def.AbstractLockUpgradeEventListener.upgradeLock(AbstractLockUpgradeEventListener.java:82)
at org.hibernate.event.def.DefaultLockEventListener.onLock(DefaultLockEventListener.java:64)
at org.hibernate.impl.SessionImpl.fireLock(SessionImpl.java:584)
at org.hibernate.impl.SessionImpl.lock(SessionImpl.java:576)
at org.jbpm.graph.node.Join.execute(Join.java:117)
at org.jbpm.graph.def.Node.enter(Node.java:314)
at org.jbpm.graph.def.Transition.take(Transition.java:151)
at org.jbpm.graph.def.Node.leave(Node.java:389)
at org.jbpm.graph.exe.Token.signal(Token.java:192)
at org.jbpm.graph.exe.Token.signal(Token.java:140)
at org.jbpm.jpdl.exe.JoinDbTest.testJoinPersistence(JoinDbTest.java:57)

EDIT. Test org.jbpm.jpdl.exe.JoinDbTest was renamed to JBPM1072Test because that is the JIRA issue why it was written. Plus the new name distinguishes it from org.jbpm.graph.node.JoinDbTest