[jboss-user] [jBPM] - ConcurrentModificationException when LocalTaskService.complete()

[TC ONG]

TC ONG [https://community.jboss.org/people/devilkazuya99] created the discussion

"ConcurrentModificationException when LocalTaskService.complete()"

To view the discussion, visit: https://community.jboss.org/message/745977#745977

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I am using jbpm 5.1.2 + drools 5.3.0

When I run the code below, SOMETIMES I get the ConcurrentModificationException.
private org.jbpm.task.TaskService localTaskService;
...
localTaskService.complete(task1.getId(), actor, contentData);

...

Here is the exception I encounter.
 java.util.ConcurrentModificationException
     at java.util.AbstractList$Itr.checkForComodification(AbstractList.java:372)
     at java.util.AbstractList$Itr.next(AbstractList.java:343)
     at org.jbpm.task.event.MessagingTaskEventListener.taskCompleted(MessagingTaskEventListener.java:72)
     at org.jbpm.task.event.TaskEventSupport.fireTaskCompleted(TaskEventSupport.java:47)
     at org.jbpm.task.service.TaskServiceSession.postTaskCompleteOperation(TaskServiceSession.java:497)
     at org.jbpm.task.service.TaskServiceSession.taskOperation(TaskServiceSession.java:463)
     at org.jbpm.task.service.local.LocalTaskService.complete(LocalTaskService.java:73)
Q1: Is it a known bug in this version?
Q2: Is it fixed?
Q3: Can bypass it?
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