Issue with receiving and sending the same signal in a process

Question

Hi everyone

So I have a process with a User Task that has a signal boundary event that listens to a certain signal X. After the user task is finished I check some values and depending on that I want to send the same signal X. See the image below:

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But when that signal is sent I get the following exception:

java.lang.IllegalStateException: State of Task must be one of the following values CREATED, RESUMED but is DESTROYED
  at ch.ivyteam.api.API.checkObjectState(API.java:323)
  at ch.ivyteam.ivy.workflow.internal.Task.end(Task.java:2642)
  at ch.ivyteam.ivy.workflow.internal.Task$49.execute(Task.java:2618)
  at ch.ivyteam.ivy.persistence.base.AbstractPersistencyService.execute(AbstractPersistencyService.java:176)
  at ch.ivyteam.ivy.persistence.base.AbstractPersistencyService.execute(AbstractPersistencyService.java:233)
  at ch.ivyteam.ivy.persistence.base.ClassPersistencyService.execute(ClassPersistencyService.java:660)
[...]

I uploaded a demo project here: https://drive.google.com/file/d/0B3V8Sh7Fl7FXR3dzMFhzVzJlTEk/view?usp=sharing

Thanks in advance

Accepted Answer

This exception can happen because of different reasons.

Mainly when the current task has been destroyed by a signal. In this case the signal to destroy a task is sent in the same task, so the task did destroy itself. This is the correct behaviour because the listening boundary Signal Event is also active when the task is in state RESUMED.

As a workaround you can place a task switch element before the sending script element and configure the task switch to execute the task as system. So the task where the boundary signal event is listening on is in state DONE and therefore not in scope of the sending signal event.

Issue with receiving and sending the same signal in a process

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