Token appears at two consecutive External Tasks

Camunda 7 Topics Discussion & Questions
1

Dear forum, what could be the reason for this behavior?

I have a process where all the service tasks are External. I noticed that the last two tasks (“SET PORT FREQUENCY” and “PROVISION INTERNAL TOPOLOGY”) are executed at the same time even though they are consecutive (no gateway to change the flow direction).
Is this normal behavior? I would expect the token to arrive to the first task, execute some action and then move on to the next. Instead what I’m seeing is that the token is “splitted” between the two (notice a second token appears on the last task without the first one being completed).

Any ideas, what might be happening? (this is the only part in the workflow where this kind of behavior is seen)

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image1652×370 28.7 KB

2

Can you upload the model please?

3

ofc_demo2_v9.bpmn (45.3 KB)

4

It looks like you’ve got yourself a sneaky sequence flow problem:

sneakySequence

This was producing two tokens from the PROVISION PORT task.

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5

Wooow, nice catch, thanks a lot Niall now it makes sense.

BTW: cool GIF :slight_smile:

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6

Actually as a point of interest - one of the reasons i found that so easily is because i have the Camunda Linting plugin installed:
sneakySequence2

Which actually help me find another error in your model that you might not have noticedsneakySequence3 :

I would suggest installing it - it’s really handy.

1 Like