Transitioning issue from post function results in workflow integrity error

[profgrape]

We have a ScriptRunner plugin that includes a postfunction that will, under certain circumstances, initiate an additional transition for an issue.  

For example, imagine there's an issue that's currently in Status A.  A user initiates a transition, T0, to Status B.  A post-function for T0 determines that the issue should in turn, initiate another transition, T1, to Status C.  To the user, Status B is effectively skipped.

However, upon doing so, the issue Status is B despite the fact that both the issue history and currently available transitions suggest the issue in in Status C.  And the Integrity Checker reports the following for the issue:

"The current step associated with the workflow entry with id 20373 has an incorrect stepId. (JRA-4539)"

The issue is resolved by running the Fix.  But I'd like to know *why* this is happening in the first place.  The postfunction is the last item in the list and therefore, should work.

Has anyone else run into a problem like this?

[profgrape]

After digging in a bit more, this looks like a race condition in JIRA.  So we ended up bailing on doing the transition in our plugin and instead, implemented it using the SR Fast-Track Transition post function.  It adds a bit of overhead when setting up a new workflow.  But it works!

[Steven F Behnke]

How are you triggering the transition?

[profgrape]

Here's a snippet of how we're performing the transition:

public static IssueService.IssueResult transitionIssue(MutableIssue issue, int transitionId, ApplicationUser user){
  IssueInputParameters issueInputParameters = ComponentAccessor.getIssueService().newIssueInputParameters()
  issueInputParameters.setSkipScreenCheck(true)

  // Need to validate the transition before we can actually perform it.
  IssueService.TransitionValidationResult validationResult = ComponentAccessor.getIssueService().validateTransition(user, issue.getId(), transitionId, issueInputParameters);

  if (validationResult.isValid()) {
    return ComponentAccessor.getIssueService().transition(user, validationResult)
  }

  log.error("Unable to validate transition!")

  log.error(formatErrorCollection(validationResult.getErrorCollection()))

  null
}

 I should note that our logs aren't reporting any errors (there's also a similar isValid() check on the result of the IssueService.transition() function).

Thanks!

Shaun