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java.lang.NullPointerException on Notification sent
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created by <a href="http://community.jboss.org/people/gonlafer">Gonzalo Lazaro</a> in <i>jBPM</i> - <a href="http://community.jboss.org/message/562363#562363">View the full discussion</a>
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<div class="jive-rendered-content"><p>Hello,</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>I've got the following problem using JBPM 4.4:</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>I have a flow started and the first task assignee is set as a process variable in the following way:</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p><task g="196,322,132,52" name="Submit adjustment for approval" candidate-groups="AdjustmentsInitiator" assignee="#{initiator}"><br/>      <notification/><br/>      <reminder duedate="1 hour" repeat="1 hour"/><br/>      <transition g="-64,-12" name="submit" to="change_status_to_submitted"/><br/>      <transition g="-155,-18" name="cancel" to="change_status_to_cancelled"/><br/>   </task></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>This is working perfectly and the assignee get a mail advising on the task assignment.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>However, if the assignee releases the task (ts.assignTask(taskId, null);) I get the following error:</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>java.lang.NullPointerException<br/>    at org.jbpm.pvm.internal.email.impl.MailProducerImpl.tokenizeActors(MailProducerImpl.java:148)<br/>    at org.jbpm.pvm.internal.email.impl.MailProducerImpl.fillRecipients(MailProducerImpl.java:194)<br/>    at org.jbpm.pvm.internal.email.impl.MailProducerImpl.fillRecipients(MailProducerImpl.java:166)<br/>    at org.jbpm.pvm.internal.email.impl.MailProducerImpl.produce(MailProducerImpl.java:82)<br/>    at org.jbpm.jpdl.internal.activity.MailListener.notify(MailListener.java:58)<br/>    at org.jbpm.pvm.internal.model.op.ExecuteEventListener.perform(ExecuteEventListener.java:81)<br/>    at org.jbpm.pvm.internal.model.ExecutionImpl.performAtomicOperationSync(ExecutionImpl.java:672)<br/>    at org.jbpm.pvm.internal.model.ExecutionImpl.performAtomicOperation(ExecutionImpl.java:632)<br/>    at org.jbpm.pvm.internal.model.ExecutionImpl.fire(ExecutionImpl.java:579)<br/>    at org.jbpm.pvm.internal.model.ExecutionImpl.fire(ExecutionImpl.java:568)<br/>    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)</p><p>....</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Is there any way to remove the task assignment without the notifications being sent?</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>The test I've done is quite simple:</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>@Test<br/>    public void testReAssignTask() {<br/>        TaskService ts = processEngine.getTaskService();<br/>        String taskId = "490009";<br/>        Task task = ts.getTask(taskId);<br/>        logger.debug(task.getAssignee());<br/>        ts.assignTask(taskId, null);<br/>    }</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Thanks, <br/>Gonzalo</p></div>
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