<font face="Default Sans Serif,Verdana,Arial,Helvetica,sans-serif"><div>Hi, </div><div><br></div><div> We're running an application that uses Drools + JBPM 5 + Drools integration our set-up can be seen as: </div><div>
<br></div><div> Some rule fires and creates a JBPM process ( a fact gets inserted into drools using "kcontext.getKnowledgeRuntime().startProcess("testProcess")"
). We have a problem with the persistence of this processes.
Persistence is implemented with JPA and JTA. Our application runs with
fireUntilHalt() and when a process is launched from the consequence of
any of the rules the persistence of the process fails. If the
application runs with fireAllRules(), the persistence works like a
charm.</div><div> </div><div> The error shown is as follow:</div><div> </div><div>
Exception in thread "Thread-5" Exception executing consequence for rule
"Run Process" in com.sample: java.lang.NullPointerException</div><div><span style="white-space:pre-wrap"> </span>at org.drools.runtime.rule.impl.DefaultConsequenceExceptionHandler.handleException(DefaultConsequenceExceptionHandler.java:39)</div>
<div><span style="white-space:pre-wrap"> </span>at org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:1101)</div><div><span style="white-space:pre-wrap"> </span>at org.drools.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:1029)</div>
<div><span style="white-space:pre-wrap"> </span>at org.drools.common.DefaultAgenda.fireUntilHalt(DefaultAgenda.java:1229)</div><div><span style="white-space:pre-wrap"> </span>at org.drools.common.AbstractWorkingMemory.fireUntilHalt(AbstractWorkingMemory.java:754)</div>
<div><span style="white-space:pre-wrap"> </span>at org.drools.common.AbstractWorkingMemory.fireUntilHalt(AbstractWorkingMemory.java:730)</div><div><span style="white-space:pre-wrap"> </span>at org.drools.command.runtime.rule.FireUntilHaltCommand$1.run(FireUntilHaltCommand.java:50)</div>
<div><span style="white-space:pre-wrap"> </span>at java.lang.Thread.run(Thread.java:662)</div><div>Caused by: java.lang.NullPointerException</div><div><span style="white-space:pre-wrap"> </span>at org.jbpm.persistence.processinstance.JPAProcessInstanceManager.addProcessInstance(JPAProcessInstanceManager.java:44)</div>
<div><span style="white-space:pre-wrap"> </span>at org.jbpm.process.instance.AbstractProcessInstanceFactory.createProcessInstance(AbstractProcessInstanceFactory.java:36)</div><div><span style="white-space:pre-wrap"> </span>at org.jbpm.process.instance.ProcessRuntimeImpl.startProcess(ProcessRuntimeImpl.java:182)</div>
<div><span style="white-space:pre-wrap"> </span>at org.jbpm.process.instance.ProcessRuntimeImpl.createProcessInstance(ProcessRuntimeImpl.java:154)</div><div><span style="white-space:pre-wrap"> </span>at org.jbpm.process.instance.ProcessRuntimeImpl.startProcess(ProcessRuntimeImpl.java:135)</div>
<div><span style="white-space:pre-wrap"> </span>at org.jbpm.process.instance.ProcessRuntimeImpl.startProcess(ProcessRuntimeImpl.java:130)</div><div><span style="white-space:pre-wrap"> </span>at org.drools.common.AbstractWorkingMemory.startProcess(AbstractWorkingMemory.java:1074)</div>
<div><span style="white-space:pre-wrap"> </span>at org.drools.impl.StatefulKnowledgeSessionImpl.startProcess(StatefulKnowledgeSessionImpl.java:301)</div><div><span style="white-space:pre-wrap"> </span>at com.sample.Rule_Run_Process.defaultConsequence(Rule_Run_Process.java:9)</div>
<div><span style="white-space:pre-wrap"> </span>at com.sample.Rule_Run_ProcessDefaultConsequenceInvoker.evaluate(Unknown Source)</div><div><span style="white-space:pre-wrap"> </span>at org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:1091)</div>
<div><span style="white-space:pre-wrap"> </span>... 6 more</div><div><span style="white-space:pre-wrap"> </span></div><div><span style="white-space:pre-wrap"> </span>The problem is in this function:</div><div><span style="white-space:pre-wrap"> </span></div>
<div><span style="white-space:pre-wrap"> </span>public void addProcessInstance(ProcessInstance processInstance) {</div><div> ProcessInstanceInfo processInstanceInfo = new ProcessInstanceInfo( processInstance, this.kruntime.getEnvironment() );</div>
<div> ProcessPersistenceContext context </div><div> = ((ProcessPersistenceContextManager) this.kruntime.getEnvironment()</div><div> .get( EnvironmentName.PERSISTENCE_CONTEXT_MANAGER ))</div>
<div> .getProcessPersistenceContext();</div><div> // @PrePersist added to ProcessInstanceInfo because of this</div><div> context.persist( processInstanceInfo );</div><div> ((org.jbpm.process.instance.ProcessInstance) processInstance).setId( processInstanceInfo.getId() );</div>
<div> processInstanceInfo.updateLastReadDate();</div><div> internalAddProcessInstance(processInstance);</div><div> }</div><div><span style="white-space:pre-wrap"> </span></div><div><span style="white-space:pre-wrap"> </span>We
think after that persist sentence, the entity manager would have to run
a flush sentence for the process instance is inserted into database and
get the ID.</div><div><span style="white-space:pre-wrap"> </span></div><div><span style="white-space:pre-wrap"> </span>Greets.</div></font>