3 Replies Latest reply on Oct 30, 2009 9:11 AM by joelmatt

    NullPointerException in JobExecutorMessageSession.send while

    joelmatt Oct 21, 2009 12:36 AM

      Hello,
      I have an application which is using spring and jbpm 4.0.
      The application works fine if all the tasks are synchronous .
      But when I add an asynchronous task in between it is giving me
      Null pointerException in JobExecutorMessageSession.send.
      It seems like the transaction is not injected into the JobExecutorMessageSession. I have JobExecuter configured in my
      jbpm.cfg.xml

      <import resource="jbpm.jobexecutor.cfg.xml" />

      and my spring config contain 
      <bean id="jbpmConfiguration" class="org.jbpm.pvm.internal.cfg.SpringConfiguration">
 <constructor-arg value="etc/jbpm.cfg.xml" />
 </bean>
 <bean id="processEngine" factory-bean="jbpmConfiguration" factory-method="buildProcessEngine" lazy-init="false" />


      I tried jbpm 4.0 but it it is also giving the same exception.
      Can anybody suggest what i am doing wrong...
      Regards,
      Joel

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        • 1. Re: NullPointerException in JobExecutorMessageSession.send w
          jbarrez
          jbarrez Oct 29, 2009 7:37 AM (in response to joelmatt)

          Could you post the exact stacktrace. I've seen the job executor working on Spring earlier.

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          • 2. Re: NullPointerException in JobExecutorMessageSession.send w
            joelmatt Oct 30, 2009 9:09 AM (in response to joelmatt)

             

            <?xml version="1.0" encoding="UTF-8"?>

<jbpm-configuration>

 <import resource="jbpm.jpdl.cfg.xml" />
 <import resource="jbpm.identity.cfg.xml" />
 <import resource="jbpm.jobexecutor.cfg.xml" />

 <process-engine-context>
 <job-executor threads="10" idle="15000" idle-max="60000" lock-millis="3600000" />

 <repository-service />
 <repository-cache />
 <execution-service />
 <history-service />
 <management-service />
 <identity-service />
 <task-service />

 <!-- Here we needed to change the transaction interceptor -->
 <command-service>
 <retry-interceptor />
 <environment-interceptor />
 <spring-transaction-interceptor />
 </command-service>

 <!-- Added spring as read-context -->
 <script-manager default-expression-language="juel"
 default-script-language="juel"
 read-contexts="execution, environment, process-engine, spring"
 write-context="">
 <script-language name="juel"
 factory="org.jbpm.pvm.internal.script.JuelScriptEngineFactory" />
 </script-manager>

 <!-- <authentication /> -->

 <id-generator />
 <types resource="jbpm.variable.types.xml" />

 <address-resolver />

 <business-calendar>
 <monday hours="9:00-12:00 and 12:30-17:00" />
 <tuesday hours="9:00-12:00 and 12:30-17:00" />
 <wednesday hours="9:00-12:00 and 12:30-17:00" />
 <thursday hours="9:00-12:00 and 12:30-17:00" />
 <friday hours="9:00-12:00 and 12:30-17:00" />
 <holiday period="01/07/2008 - 31/08/2008" />
 </business-calendar>

 <mail-template name='task-notification'>
 <to users="${task.assignee}" />
 <subject>${task.name}</subject>
 <text><![CDATA[Hi ${task.assignee},
Task "${task.name}" has been assigned to you.
${task.description}

Sent by JBoss jBPM
]]></text>
 </mail-template>

 <mail-template name='task-reminder'>
 <to users="${task.assignee}" />
 <subject>${task.name}</subject>
 <text><![CDATA[Hey ${task.assignee},
Do not forget about task "${task.name}".
${task.description}

Sent by JBoss jBPM
]]></text>
 </mail-template>



 </process-engine-context>

 <transaction-context>
 <repository-session />
 <db-session />
 <transaction />
 <message-session />
 <timer-session />
 <history-session />
 <mail-session>
 <mail-server>
 <session-properties resource="jbpm.mail.properties" />
 </mail-server>
 </mail-session>

 <!-- Need to set explicitly that we don't want jbpm to create sessions -->
 <hibernate-session current="false" />
 </transaction-context>
</jbpm-configuration>

            The above configuration worked. I was missing tag in <transaction-context> and I have upgraded to jbpm 4.1


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            • 3. Re: NullPointerException in JobExecutorMessageSession.send w
              joelmatt Oct 30, 2009 9:11 AM (in response to joelmatt)

              was missing in <transaction-context>.

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