NullPointerException - "currentUser" is Null

[Maillman]

I'm not sure if this is a problem for anyone else starting up the autograder, but when I start it, it tries to rerun the submissions in the queue. However, it throws a NullPointerException saying

Cannot invoke "edu.byu.cs.model.User.repoUrl()" because "currentUser" is null
	at edu.byu.cs.service.SubmissionService.reRunSubmissionsInQueue(SubmissionService.java:305)

Solving this would be a small null check on the currentUser before calling currentUser.repoUrl() on it.

[TheDavSmasher]

@Maillman Does this happen when you start the autograder locally? Or can we get a bit more details on how this happens? Because while the null check is a good idea, I'm more confused why there'd be a QueueItem in the Queue but not a User related to that netId.

[Maillman]

Yeah, I had this problem when I started the autograder locally. I should've captured a screenshot because I tried running it locally again and it seems to be running fine now... So I'm not really sure what went wrong that one time I ran it.
We could still include the null check and handle it if the 'currentUser' is somehow null, but I am unsure of a situation that would somehow cause that to occur.

[TheDavSmasher]

Yeah cause I'm more interested in knowing what could cause the currentUser to be null rather than allow null users through, at least in terms of the function, but I'm unsure