pushpak1981 [https://community.jboss.org/people/pushpak1981] created the 
discussion

"jBPM AsynchronousInterceptor"

To view the discussion, visit: https://community.jboss.org/message/731715#731715

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Hi,

Is there any way i can use drools Asynchronous Interceptor to start a new jBPM 
process? 

I found a link where is mentions for the same :  
http://drools.46999.n3.nabble.com/Blocking-Call-to-startProcess-td49557.html#a49560
 
http://drools.46999.n3.nabble.com/Blocking-Call-to-startProcess-td49557.html#a49560

I tried with combination of CommandBasedStatefulKnowledgeSession and 
AsynchronousInterceptor but it gives NPE in case of Human Tasks.

Following is the trace:
21:15:25,684 INFO  [org.apache.mina.filter.logging.LoggingFilter] 
(NioProcessor-1) RECEIVED: HeapBuffer[pos=0 lim=1012 cap=2048: 00 00 01 4F AC 
ED 00 05 73 72 01 00 1D 6F 72 67...]
21:15:25,687 ERROR [org.drools.persistence.SingleSessionCommandService] 
(Thread-220) Could not commit session: java.lang.NullPointerException
        at 
org.drools.command.impl.CommandBasedStatefulKnowledgeSession.getId(CommandBasedStatefulKnowledgeSession.java:119)
 [drools-core-5.3.1.Final.jar:]
        at 
org.jbpm.process.workitem.wsht.CommandBasedWSHumanTaskHandler.executeWorkItem(CommandBasedWSHumanTaskHandler.java:132)
 [jbpm-human-task-5.2.0.Final.jar:]
        at 
org.drools.persistence.jpa.processinstance.JPAWorkItemManager.internalExecuteWorkItem(JPAWorkItemManager.java:53)
 [drools-persistence-jpa-5.3.1.Final.jar:]
        at 
org.jbpm.workflow.instance.node.WorkItemNodeInstance.internalTrigger(WorkItemNodeInstance.java:105)
 [jbpm-flow-5.2.0.Final.jar:]
        at 
org.jbpm.workflow.instance.impl.NodeInstanceImpl.trigger(NodeInstanceImpl.java:122)
 [jbpm-flow-5.2.0.Final.jar:]
        at 
org.jbpm.workflow.instance.impl.NodeInstanceImpl.triggerConnection(NodeInstanceImpl.java:185)
 [jbpm-flow-5.2.0.Final.jar:]
        at 
org.jbpm.workflow.instance.impl.NodeInstanceImpl.triggerCompleted(NodeInstanceImpl.java:150)
 [jbpm-flow-5.2.0.Final.jar:]
        at 
org.jbpm.workflow.instance.node.ActionNodeInstance.triggerCompleted(ActionNodeInstance.java:55)
 [jbpm-flow-5.2.0.Final.jar:]
        at 
org.jbpm.workflow.instance.node.ActionNodeInstance.internalTrigger(ActionNodeInstance.java:51)
 [jbpm-flow-5.2.0.Final.jar:]
        at 
org.jbpm.workflow.instance.impl.NodeInstanceImpl.trigger(NodeInstanceImpl.java:122)
 [jbpm-flow-5.2.0.Final.jar:]
        at 
org.jbpm.workflow.instance.impl.NodeInstanceImpl.triggerConnection(NodeInstanceImpl.java:185)
 [jbpm-flow-5.2.0.Final.jar:]
        at 
org.jbpm.workflow.instance.impl.NodeInstanceImpl.triggerCompleted(NodeInstanceImpl.java:150)
 [jbpm-flow-5.2.0.Final.jar:]
        at 
org.jbpm.workflow.instance.node.StartNodeInstance.triggerCompleted(StartNodeInstance.java:49)
 [jbpm-flow-5.2.0.Final.jar:]
        at 
org.jbpm.workflow.instance.node.StartNodeInstance.internalTrigger(StartNodeInstance.java:41)
 [jbpm-flow-5.2.0.Final.jar:]
        at 
org.jbpm.workflow.instance.impl.NodeInstanceImpl.trigger(NodeInstanceImpl.java:122)
 [jbpm-flow-5.2.0.Final.jar:]
        at 
org.jbpm.ruleflow.instance.RuleFlowProcessInstance.internalStart(RuleFlowProcessInstance.java:35)
 [jbpm-flow-5.2.0.Final.jar:]
        at 
org.jbpm.process.instance.impl.ProcessInstanceImpl.start(ProcessInstanceImpl.java:188)
 [jbpm-flow-5.2.0.Final.jar:]
        at 
org.jbpm.workflow.instance.impl.WorkflowProcessInstanceImpl.start(WorkflowProcessInstanceImpl.java:303)
 [jbpm-flow-5.2.0.Final.jar:]
        at 
org.jbpm.process.instance.ProcessRuntimeImpl.startProcessInstance(ProcessRuntimeImpl.java:168)
 [jbpm-flow-5.2.0.Final.jar:]
        at 
org.jbpm.process.instance.ProcessRuntimeImpl.startProcess(ProcessRuntimeImpl.java:138)
 [jbpm-flow-5.2.0.Final.jar:]
        at 
org.drools.common.AbstractWorkingMemory.startProcess(AbstractWorkingMemory.java:1079)
 [drools-core-5.3.1.Final.jar:]
        at 
org.drools.impl.StatefulKnowledgeSessionImpl.startProcess(StatefulKnowledgeSessionImpl.java:306)
 [drools-core-5.3.1.Final.jar:]
        at 
org.drools.command.runtime.process.StartProcessCommand.execute(StartProcessCommand.java:119)
 [drools-core-5.3.1.Final.jar:]
        at 
org.drools.command.runtime.process.StartProcessCommand.execute(StartProcessCommand.java:38)
 [drools-core-5.3.1.Final.jar:]
        at 
org.drools.command.impl.DefaultCommandService.execute(DefaultCommandService.java:36)
 [drools-core-5.3.1.Final.jar:]
        at 
org.drools.persistence.SingleSessionCommandService.execute(SingleSessionCommandService.java:345)
 [drools-persistence-jpa-5.3.1.Final.jar:]
        at 
org.drools.command.impl.AbstractInterceptor.executeNext(AbstractInterceptor.java:42)
 [drools-core-5.3.1.Final.jar:]
        at 
org.drools.command.impl.AsynchronousInterceptor$1.run(AsynchronousInterceptor.java:27)
 [drools-core-5.3.1.Final.jar:]
        at java.lang.Thread.run(Thread.java:619) [:1.6.0_03]


without the Human Task the workflow completed properly.

Any hints would be really helpful.

Thanks.
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