[jboss-user] [jBPM] - Incorrect Gateway diverge and converge operations in jBPM 5

[shashi mhatre]

shashi mhatre [http://community.jboss.org/people/khalipili] created the discussion

"Incorrect Gateway diverge and converge operations in jBPM 5"

To view the discussion, visit: http://community.jboss.org/message/581930#581930

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I am using below sample flow in my test. it contains three human task. once the process process is started it execute successfully till human task creation. As the first gateway diverge is of type "AND" it creates two task as shown below. I can view these task in jbpm-console. now once i login as user "Shashi" and complete the first task, As the next gateway converge is of type "XOR", the flow proceeds further and create the next task for user "Shashi".

As process have proceed further till gateway converge, jbpm should have remove the task for user "kris". but jbpm still shows the task for user "kris".
this seems to be a error in jbpm process execution.

next once user "shashi" completes the human task, process execution completes but throws below error. it seems that human task handler tries to abort the "kris" task which should have be aborted prior (at gateway converge).

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java.lang.IllegalArgumentException: attempt to create merge event with null entity
          at org.hibernate.event.MergeEvent.<init>(MergeEvent.java:60)
          at org.hibernate.event.MergeEvent.<init>(MergeEvent.java:43)
          at org.hibernate.impl.SessionImpl.merge(SessionImpl.java:688)
          at org.hibernate.impl.SessionImpl.merge(SessionImpl.java:692)
          at org.hibernate.ejb.AbstractEntityManagerImpl.merge(AbstractEntityManagerImpl.java:235)
          at org.drools.persistence.processinstance.JPAWorkItemManager.abortWorkItem(JPAWorkItemManager.java:124)
          at org.drools.command.runtime.process.AbortWorkItemCommand.execute(AbortWorkItemCommand.java:56)
          at org.drools.command.runtime.process.AbortWorkItemCommand.execute(AbortWorkItemCommand.java:29)
          at org.drools.persistence.session.SingleSessionCommandService.execute(SingleSessionCommandService.java:274)
          at org.drools.command.impl.CommandBasedStatefulKnowledgeSession$1.abortWorkItem(CommandBasedStatefulKnowledgeSession.java:149)
          at com.sample.util.CommandBasedWSHumanTaskHandler$GetCompletedTaskResponseHandler.execute(CommandBasedWSHumanTaskHandler.java:257)
          at org.jbpm.task.service.TaskClientHandler.messageReceived(TaskClientHandler.java:81)
          at org.jbpm.task.service.mina.MinaTaskClientHandler.messageReceived(MinaTaskClientHandler.java:47)
          at org.apache.mina.core.filterchain.DefaultIoFilterChain$TailFilter.messageReceived(DefaultIoFilterChain.java:713)
          at org.apache.mina.core.filterchain.DefaultIoFilterChain.callNextMessageReceived(DefaultIoFilterChain.java:434)
          at org.apache.mina.core.filterchain.DefaultIoFilterChain.access$1200(DefaultIoFilterChain.java:46)
          at org.apache.mina.core.filterchain.DefaultIoFilterChain$EntryImpl$1.messageReceived(DefaultIoFilterChain.java:793)
          at org.apache.mina.filter.codec.ProtocolCodecFilter$ProtocolDecoderOutputImpl.flush(ProtocolCodecFilter.java:375)
          at org.apache.mina.filter.codec.ProtocolCodecFilter.messageReceived(ProtocolCodecFilter.java:229)
          at org.apache.mina.core.filterchain.DefaultIoFilterChain.callNextMessageReceived(DefaultIoFilterChain.java:434)
          at org.apache.mina.core.filterchain.DefaultIoFilterChain.access$1200(DefaultIoFilterChain.java:46)
          at org.apache.mina.core.filterchain.DefaultIoFilterChain$EntryImpl$1.messageReceived(DefaultIoFilterChain.java:793)
          at org.apache.mina.core.filterchain.IoFilterAdapter.messageReceived(IoFilterAdapter.java:119)
          at org.apache.mina.core.filterchain.DefaultIoFilterChain.callNextMessageReceived(DefaultIoFilterChain.java:434)
          at org.apache.mina.core.filterchain.DefaultIoFilterChain.fireMessageReceived(DefaultIoFilterChain.java:426)
          at org.apache.mina.core.polling.AbstractPollingIoProcessor.read(AbstractPollingIoProcessor.java:638)
          at org.apache.mina.core.polling.AbstractPollingIoProcessor.process(AbstractPollingIoProcessor.java:598)
          at org.apache.mina.core.polling.AbstractPollingIoProcessor.process(AbstractPollingIoProcessor.java:587)
          at org.apache.mina.core.polling.AbstractPollingIoProcessor.access$400(AbstractPollingIoProcessor.java:61)
          at org.apache.mina.core.polling.AbstractPollingIoProcessor$Processor.run(AbstractPollingIoProcessor.java:969)
          at org.apache.mina.util.NamePreservingRunnable.run(NamePreservingRunnable.java:64)
          at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
          at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
          at java.lang.Thread.run(Thread.java:662)
[2011:01:19 17:01:78:exception] Uncaught exception on client

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