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jBPM 4.3, multiple threads handled sub-process caused its parent process throwing exceptions
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created by <a href="http://community.jboss.org/people/tunmang">Tun Mang</a> in <i>jBPM</i> - <a href="http://community.jboss.org/message/617763#617763">View the full discussion</a>
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<div class="jive-rendered-content"><p>Hi :</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>I have a jpdl with fork as shown below :</p><p>  </p><p>  -->(fork-node)-->(sub-process-node-A)-->(join-node)</p><p>                -->(sub-process-node-B)--></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>The sub-process-node-A and sub-process-node-B refer a same and very simple sub-process jpdl (which has only 3 nodes: start, state and end). But there is one thread to call the signal process function per sub-process (i.e. there are totally 2 threads running to handle the externl jobs).</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>When the thread calls the signal process function to end its corresponding sub-process, it's all OK:</p><p>          </p><p>....          </p><p>21:50:36 DEBUG [....EndHandler]: (AP) parent process: (PVODDelivery.2660001)</p><p>21:50:36 DEBUG [....EndHandler]: (AP)   execution id: (ConformAsset.2660164)</p><p>....</p><p>21:50:36 DEBUG [....EndHandler]: (AP) parent process: (PVODDelivery.2660001)</p><p>21:50:36 DEBUG [....EndHandler]: (AP)   execution id: (ConformAsset.2660078)</p><p>....</p><p>  </p><p>But right after the ending of the sub-process, jbpm always throws the following exceptions:</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>21:50:37,164 INF | [DefaultCommandService] exception while executing command org.jbpm.pvm.internal.cmd.SignalCmd@64f06ab7</p><p>org.hibernate.StaleObjectStateException: </p><p>Row was updated or deleted by another transaction (or unsaved-value mapping was incorrect): [org.jbpm.pvm.internal.model.ExecutionImpl#2660001]</p><p>          at org.hibernate.dialect.lock.SelectLockingStrategy.lock(SelectLockingStrategy.java:102)</p><p>          at org.hibernate.persister.entity.AbstractEntityPersister.lock(AbstractEntityPersister.java:1361)</p><p>          at org.hibernate.event.def.AbstractLockUpgradeEventListener.upgradeLock(AbstractLockUpgradeEventListener.java:108)</p><p>          at org.hibernate.event.def.DefaultLockEventListener.onLock(DefaultLockEventListener.java:87)</p><p>          at org.hibernate.impl.SessionImpl.fireLock(SessionImpl.java:611)</p><p>          at org.hibernate.impl.SessionImpl.lock(SessionImpl.java:603)</p><p>          at org.jbpm.jpdl.internal.activity.JoinActivity.execute(JoinActivity.java:68)</p><p>          at org.jbpm.jpdl.internal.activity.JoinActivity.execute(JoinActivity.java:49)</p><p>          at org.jbpm.pvm.internal.model.op.ExecuteActivity.perform(ExecuteActivity.java:60)</p><p>          at org.jbpm.pvm.internal.model.ExecutionImpl.performAtomicOperationSync(ExecutionImpl.java:678)</p><p>          at org.jbpm.pvm.internal.model.ExecutionImpl.performAtomicOperation(ExecutionImpl.java:638)</p><p>          at org.jbpm.pvm.internal.model.ExecutionImpl.signal(ExecutionImpl.java:439)</p><p>          at org.jbpm.pvm.internal.model.ExecutionImpl.signal(ExecutionImpl.java:421)</p><p>    ....</p><p>    </p><p>Is there a way to fix this issue via "jbpm.default.cfg.xml" or "jbpm.hibernate.cfg.xml" ?</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Thanks a lot for you time and help in advance.</p></div>
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