Details
-
Bug Report
-
Resolution: Fixed
-
L3 - Default
-
None
Description
Pre-condition:
Deploy a process with a parallel multi instance sub process. This sub process contains a task with a execution-end-listener:
<subProcess id="messageSubprocessLoop"> <multiInstanceLoopCharacteristics> <loopCardinality xsi:type="tFormalExpression">2</loopCardinality> </multiInstanceLoopCharacteristics> <startEvent id="StartEvent_1" /> <sequenceFlow sourceRef="StartEvent_1" targetRef="task" /> <receiveTask id="task" messageRef="Message_1"> <extensionElements> <camunda:executionListener class="org.my.company.MyListener" event="end"/> </extensionElements> </receiveTask> <sequenceFlow sourceRef="task" targetRef="EndEvent_1"/> <endEvent id="EndEvent_1" /> </subProcess>
Start an instance of the process, so that there are two tasks: receiveTask1 and receiveTask2. And there are two threads t1 and t2. t1 correlates a message against receiveTask1 and t2 correlates a message against receiveTask2 in parallel.
Problem:
1) Both threads t1 and t2 fetch the current execution tree.
2) t1 signals receiveTask1 -> execution-end-listener is invoked
3) t2 signals receiveTask2 -> execution-end-listener is invoked
4) t1 executes end event inside parallel multi instance sub process
5) t2 executes end event inside parallel multi instance sub process
6) t1 calls ParallelMultiInstanceActivityBehavior#concurrentChildExecutionEnded()
– the variable nrOfActiveInstances is set to 1
7) t1 flushes and commits its changes
8) t2 calls ParallelMultiInstanceActivityBehavior#concurrentChildExecutionEnded()
– fetch the variable nrOfActiveInstances (value is 1)
– decrement nrOfActiveInstances (value is 0)
– for each concurrent child execution deleteCascade is invoked -> execution-end-listener of receiveTask1 is invoked
Expected behavior:
The execution-end-listener of receiveTask1 is not invoked in step 8.