Service tasks are executed multiple times

[simonovdenis]

Hello All.

Maybe it is the known issue - I have multiple service tasks in process, which are supposed to be called one by one. The issue is, that some of them are called multiple times. To be more presize - I have 3 service tasks, first one is called 1 time, second one is called 3 times, third task is called 2 times(I can see it in debug). Simplified process looks so:

<process id="simple-test" name="simple-test">
    <startEvent id="start"/>

    <sequenceFlow sourceRef="start" targetRef="firstServiceTask" />

    <serviceTask id="firstServiceTask" name="First Service Task"
                 flowable:delegateExpression="${firstJavaDelegateSpringBean}" />

    <sequenceFlow sourceRef="firstServiceTask" targetRef="secondServiceTask" />

    <serviceTask id="secondServiceTask" name="Second Service Task"
                 flowable:delegateExpression="${secondJavaDelegateSpringBean}"/>

    <sequenceFlow sourceRef="secondServiceTask" targetRef="thirdServiceTask"/>

    <serviceTask id="thirdServiceTask" name="Schedule Auction Specification Event Action"
                 flowable:delegateExpression="${thirdJavaDelegateSpringBean}"/>

    <sequenceFlow sourceRef="thirdServiceTask" targetRef="end"/>

    <endEvent id="end"/>
</process>

Have you ever faced similar behavior? how did you solve it for yourself?

[ruudg]

These 3 service tasks are executed in the same transaction.
If there is an uncatched exception in the third task, all tasks are re-executed. In this case, it's strange that you see that the first task is executed one time only.