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Persisted timer event couldn't find work item handler after reload
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created by <a href="https://community.jboss.org/people/tmag">tmag</a> in <i>jBPM</i> - <a href="https://community.jboss.org/message/760475#760475">View the full discussion</a>
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<div class="jive-rendered-content"><p>We are planning to start using JBPM 5.3 in our organization, and started with the following simple process which has the deadline for this month end. Please help !!</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Its a simple timer task with 500ms delay & 30 sec period - which sends a reminder email every 30 sec . We need this process to be persistent to be able to restore anytime.</p><p>For testing am using Postgres.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>1) First am starting a process and after a couple of reminder emails sent out (say after 1 minute) stopping that process to simulate a failure scenerio. Then am reloading the session.</p><p>2) When I reload the session quickly within the period  (30 sec) - there are no exceptions & able to see timer event kicking off reminders as per schedule. Here is my code :</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>       <strong> setupDataSource();    // postgres datasource</strong></p><p><strong>        Environment env = getEnvironment();</strong></p><p><strong>        KnowledgeBase kbase = createKnowledgeBase("IncidentProcess.bpmn");</strong></p><p>        </p><p><strong>       StatefulKnowledgeSession ksession = JPAKnowledgeService.loadStatefulKnowledgeSession( <sessionId>, kbase, null, env );</strong></p><p>      <span style="color: #ff0000;"><strong> ksession.getWorkItemManager().registerWorkItemHandler("Email", new SystemOutWorkItemHandler());</strong></span></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>3)  <strong>But when I wait more than 30 sec., say upto 5 minutes (in relatime - maintenance may take hours) & reload the session - getting the following exception about WorkItemHanlder which am registering as above. But seems its failing while loading session itself. Also its deleting entry from 'ProcessInstanceInfo' table. </strong></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Hibernate: select nextval ('WORKITEMINFO_ID_SEQ')</p><p>Hibernate: select workitemin0_.workItemId as workItemId4_0_, workitemin0_.creationDate as creation2_4_0_, workitemin0_.name as name4_0_, workitemin0_.processInstanceId as processI4_4_0_, workitemin0_.state as state4_0_, workitemin0_.OPTLOCK as OPTLOCK4_0_, workitemin0_.workItemByteArray as workItem7_4_0_ from WorkItemInfo workitemin0_ where workitemin0_.workItemId=?</p><p>Hibernate: select processins0_.InstanceId as col_0_0_ from ProcessInstanceInfo processins0_ inner join EventTypes eventtypes1_ on processins0_.InstanceId=eventtypes1_.InstanceId where eventtypes1_.element=?</p><p>Unable to execute timer job!</p><p>org.drools.RuntimeDroolsException: Unexpected exception executing action org.jbpm.process.instance.event.DefaultSignalManager$SignalProcessInstanceAction@1516f91</p><p>    at org.drools.common.AbstractWorkingMemory.executeQueuedActions(AbstractWorkingMemory.java:979)</p><p>    at org.drools.impl.StatefulKnowledgeSessionImpl.executeQueuedActions(StatefulKnowledgeSessionImpl.java:866)</p><p>    at org.jbpm.process.instance.event.DefaultSignalManager.signalEvent(DefaultSignalManager.java:90)</p><p>    at org.jbpm.process.instance.timer.TimerManager$ProcessJob.execute(TimerManager.java:278)</p><p>    at org.drools.time.SelfRemovalJob.execute(SelfRemovalJob.java:15)</p><p>    at org.drools.time.impl.DefaultTimerJobInstance.call(DefaultTimerJobInstance.java:47)</p><p>    at org.drools.persistence.jpa.JpaTimerJobInstance.internalCall(JpaTimerJobInstance.java:43)</p><p>    at org.drools.persistence.jpa.JDKCallableJobCommand.execute(JDKCallableJobCommand.java:20)</p><p>    at org.drools.persistence.jpa.JDKCallableJobCommand.execute(JDKCallableJobCommand.java:6)</p><p>    at org.drools.command.impl.DefaultCommandService.execute(DefaultCommandService.java:36)</p><p>    at org.drools.persistence.SingleSessionCommandService.execute(SingleSessionCommandService.java:367)</p><p>    at org.drools.persistence.jpa.JpaTimerJobInstance.call(JpaTimerJobInstance.java:34)</p><p>    at org.drools.persistence.jpa.JpaTimerJobInstance.call(JpaTimerJobInstance.java:14)</p><p>    at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)</p><p>    at java.util.concurrent.FutureTask.run(Unknown Source)</p><p>    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(Unknown Source)</p><p>    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(Unknown Source)</p><p>    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)</p><p>    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)</p><p>    at java.lang.Thread.run(Unknown Source)</p><p>Caused by: org.jbpm.workflow.instance.WorkflowRuntimeException: [com.ecom.incident.process:8 - Reminder:5] -- Could not find work item handler for Email</p><p>    at org.jbpm.workflow.instance.impl.NodeInstanceImpl.trigger(NodeInstanceImpl.java:130)</p><p>    at org.jbpm.workflow.instance.impl.NodeInstanceImpl.triggerNodeInstance(NodeInstanceImpl.java:205)</p><p>    at org.jbpm.workflow.instance.impl.NodeInstanceImpl.triggerConnection(NodeInstanceImpl.java:213)</p><p>    at org.jbpm.workflow.instance.node.SplitInstance.internalTrigger(SplitInstance.java:100)</p><p>    at org.jbpm.workflow.instance.impl.NodeInstanceImpl.trigger(NodeInstanceImpl.java:124)</p><p>    at org.jbpm.workflow.instance.impl.NodeInstanceImpl.triggerNodeInstance(NodeInstanceImpl.java:205)</p><p>    at org.jbpm.workflow.instance.impl.NodeInstanceImpl.triggerCompleted(NodeInstanceImpl.java:164)</p><p>    at org.jbpm.workflow.instance.impl.ExtendedNodeInstanceImpl.triggerCompleted(ExtendedNodeInstanceImpl.java:47)</p><p>    at org.jbpm.workflow.instance.node.StateBasedNodeInstance.triggerCompleted(StateBasedNodeInstance.java:162)</p><p>    at org.jbpm.workflow.instance.node.TimerNodeInstance.triggerCompleted(TimerNodeInstance.java:135)</p><p>    at org.jbpm.workflow.instance.node.TimerNodeInstance.signalEvent(TimerNodeInstance.java:125)</p><p>    at org.jbpm.workflow.instance.impl.WorkflowProcessInstanceImpl.signalEvent(WorkflowProcessInstanceImpl.java:326)</p><p>    at org.jbpm.process.instance.event.DefaultSignalManager$SignalProcessInstanceAction.execute(DefaultSignalManager.java:118)</p><p>    at org.drools.common.AbstractWorkingMemory.executeQueuedActions(AbstractWorkingMemory.java:977)</p><p>    ... 19 more</p><p>Hibernate: insert into WorkItemInfo (creationDate, name, processInstanceId, state, OPTLOCK, workItemByteArray, workItemId) values (?, ?, ?, ?, ?, ?, ?)</p><p>Hibernate: update WorkItemInfo set creationDate=?, name=?, processInstanceId=?, state=?, OPTLOCK=?, workItemByteArray=? where workItemId=? and OPTLOCK=?</p><p>Hibernate: delete from EventTypes where InstanceId=?</p><p><span style="color: #ff0000;"><strong>Hibernate: delete from ProcessInstanceInfo where InstanceId=? and OPTLOCK=?</strong></span></p><p><a href="https://community.jboss.org/servlet/JiveServlet/showImage/2-760475-19528/IncidentProcess2-image.png"><span> https://community.jboss.org/servlet/JiveServlet/downloadImage/2-760475-19528/450-146/IncidentProcess2-image.png </span></a></p></div>
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