[jboss-user] [jBPM Users] - Timer throwing exception intermittently

[sridhar18]

Hi,
I'm getting the following error at times when my timers are firing.
11:19:51,157 ERROR [ExecuteJobCmd] exception while executing 'timer[46|2009-10-28 11:19:51,040|timeout]'
org.hibernate.ObjectNotFoundException: No row with the given identifier exists: [org.jbpm.pvm.internal.model.ExecutionImpl#152]
        at org.hibernate.impl.SessionFactoryImpl$2.handleEntityNotFound(SessionFactoryImpl.java:409)
        at org.hibernate.proxy.AbstractLazyInitializer.checkTargetState(AbstractLazyInitializer.java:108)
        at org.hibernate.proxy.AbstractLazyInitializer.initialize(AbstractLazyInitializer.java:97)
        at org.hibernate.proxy.AbstractLazyInitializer.getImplementation(AbstractLazyInitializer.java:140)
        at org.hibernate.proxy.pojo.javassist.JavassistLazyInitializer.invoke(JavassistLazyInitializer.java:190)
        at org.jbpm.pvm.internal.model.ExecutionImpl_$$_javassist_4.getActivity(ExecutionImpl_$$_javassist_4.java)
        at org.jbpm.pvm.internal.job.TimerImpl.execute(TimerImpl.java:94)
        at org.jbpm.pvm.internal.job.TimerImpl.execute(TimerImpl.java:52)
        at org.jbpm.pvm.internal.cmd.ExecuteJobCmd.execute(ExecuteJobCmd.java:76)
        at org.jbpm.pvm.internal.cmd.ExecuteJobCmd.execute(ExecuteJobCmd.java:42)
        at org.jbpm.pvm.internal.svc.DefaultCommandService.execute(DefaultCommandService.java:42)
        at org.jbpm.pvm.internal.tx.jta.JtaTransactionInterceptor.executeInNewTx(JtaTransactionInterceptor.java:79)
        at org.jbpm.pvm.internal.tx.jta.JtaTransactionInterceptor.execute(JtaTransactionInterceptor.java:61)
        at org.jbpm.pvm.internal.svc.RetryInterceptor.execute(RetryInterceptor.java:55)
        at org.jbpm.pvm.internal.tx.jta.JtaRetryInterceptor.executeWithRetry(JtaRetryInterceptor.java:52)
        at org.jbpm.pvm.internal.tx.jta.JtaRetryInterceptor.execute(JtaRetryInterceptor.java:45)
        at org.jbpm.pvm.internal.svc.EnvironmentInterceptor.execute(EnvironmentInterceptor.java:46)
        at org.jbpm.pvm.internal.jobexecutor.JobParcel.run(JobParcel.java:48)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)

Sample timer in my process definition:

  |    <state g="138,450,127,52" name="Validate">
  |       <on event="timeout">
  |         <timer name="checkValidity" duedate="3 minutes" repeat="2 minutes"/>
  |         <event-listener class="some.class.CheckValidityEvent">
  |           <field name="idType"><string value="ID"/></field>
  |         </event-listener>
  |       </on>
  |       <transition g="-72,-22" name="valid" to="complete"/>
  |       <transition g="-72,-22" name="invalid" to="end"/>
  |    </state>
  | 

The timers tend to exist though and run just fine on the next timeout. 
I'm using jbpm 4.1 on jboss 5.1. Thanks in advance.

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