Parallel SubProcess and Boundaryevents

[heri]

I am new to activiti and trying to create a parallel subprocess with a timeout and an error boundary event. I have three problems which I can't seem to solve on my own:

1. despite setting isSequential="true" in the multiInstanceLoopCharacteristics element, the SubProcesses are executed sequentially.
2. the timeout boundary event is never triggered.
3. despite setting cancelActivity=true" in the boundaryElement element, the subprocess is not cancelled when an errorEvent is thrown. After all subprocesses have finished, I get the following exception:

org.activiti.engine.impl.pvm.PvmException: already taking a transition   at org.activiti.engine.impl.persistence.entity.ExecutionEntity.take(ExecutionEntity.java:443)‍‍‍‍

My script looks as follows (should be importable in a unit-test):

<?xml version="1.0" encoding="UTF-8"?><definitions id="definitions"             xmlns="http://www.omg.org/spec/BPMN/20100524/MODEL" xmlns:activiti="http://activiti.org/bpmn"             targetNamespace="Examples" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"             xsi:schemaLocation="             http://www.omg.org/spec/BPMN/20100524/MODEL http://www.omg.org/spec/BPMN/2.0/20100501/BPMN20.xsd">    <process id="testProcess" name="Test process">        <startEvent id="start"/>        <sequenceFlow sourceRef="start" targetRef="listTask"/>        <scriptTask id="listTask" name="Create List" scriptFormat="groovy">            <script>                out:println "Task 1: creating list"                def list = []                list.add("item1")                list.add("item2")                execution.setVariable("list", list)            </script>        </scriptTask>        <sequenceFlow sourceRef="listTask" targetRef="decisionSubprocess"/>        <subProcess id="decisionSubprocess" name="Subprocess">            <multiInstanceLoopCharacteristics                    isSequential="false" activiti:collection="${list}"                    activiti:elementVariable="item">            </multiInstanceLoopCharacteristics>            <startEvent id="decisionStart"/>            <sequenceFlow sourceRef="decisionStart" targetRef="decisionTask"/>            <scriptTask id="decisionTask" name="Decide" scriptFormat="groovy">                <script>                    sleep(3000)                    out:println "List " + execution.getVariable("item")                    execution.setVariable("accepted", 0)                </script>            </scriptTask>            <sequenceFlow sourceRef="decisionTask" targetRef="notificationAccepted" />            <exclusiveGateway id="notificationAccepted"/>            <sequenceFlow sourceRef="notificationAccepted" targetRef="changesRejectedEvent">                <conditionExpression>                    ${accepted == 0}                </conditionExpression>            </sequenceFlow>            <endEvent id="changesRejectedEvent">                <errorEventDefinition errorRef="changesRejected"/>            </endEvent>            <sequenceFlow sourceRef="notificationAccepted" targetRef="decisionEnd">                <conditionExpression>                    ${accepted == 1}                </conditionExpression>            </sequenceFlow>            <endEvent id="decisionEnd"/>        </subProcess>        <boundaryEvent id="timeoutEvent" attachedToRef="decisionSubprocess" cancelActivity="true">            <timerEventDefinition>                <timeDuration>PT2S</timeDuration>            </timerEventDefinition>        </boundaryEvent>        <boundaryEvent id="errorEvent" attachedToRef="decisionSubprocess" cancelActivity="true">            <errorEventDefinition errorRef="changesRejected"/>        </boundaryEvent>        <sequenceFlow sourceRef="timeoutEvent" targetRef="timeout"/>        <scriptTask id="timeout" name="Post Timeout" scriptFormat="groovy">            <script>                out:println "Timeout occurred."            </script>        </scriptTask>        <sequenceFlow sourceRef="errorEvent" targetRef="error"/>        <scriptTask id="error" name="Post Decline" scriptFormat="groovy">            <script>                out:println "Some declined."            </script>        </scriptTask>        <sequenceFlow sourceRef="error" targetRef="end"/>        <sequenceFlow sourceRef="timeout" targetRef="end"/>        <sequenceFlow sourceRef="decisionSubprocess"                      targetRef="normalEnd"/>        <scriptTask id="normalEnd" name="Post Accepted" scriptFormat="groovy">            <script>                out:println "All accepted."            </script>        </scriptTask>        <sequenceFlow targetRef="end"                      sourceRef="normalEnd"/>        <endEvent id="end"/>    </process></definitions>‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

Would be grateful if someone could point out the errors I made.

[vasile_dirla]

Hi,
Please provide a unit test showing this behaviour (it will be easier for all of us to investigate it)
http://forums.activiti.org/content/sticky-how-write-unit-test

[heri]

Sorry, not sure if there is an edit option in this forum, but I could not find one. I've created a visual represenation of the process using activiti designer for better understandability of what I am trying to achieve:

http://postimg.org/image/jgh5ysen5/

So I create a list in the first task, iterate over it using parallel subprocesses and each subprocess may either terminate correctly or throw an error event.

edit: thx Vasile, I have attached the zip (renamed to .txt).

[vasile_dirla]

ok, let's see what's happening..