Teammates: InstructorFeedbackResponseCommentDeleteActionTest is not stable

[HirdayGupta]

The InstructorFeedbackResponseCommentDeleteActionTest is failing.

• Travis error message: Java.lang.NullPointerException at InstructorFeedbackResponseCommentDeleteActionTest.java:52.
• local machine error message: java.lang.AssertionError: response comment not found at InstructorFeedbackResponseCommentDeleteActionTest.java:124

This was happening across all my open PRs before #7452 was merged by @whipermr5, but is now happening only on #7416 and #7453. Requesting assistance in dealing with this issue.

Note: the error persists even after multiple test tries in Travis.

[wkurniawan07]

I've been observing for the past few days. Seems like this failure has non-trivial potential to halt an otherwise-passing build, so this should be remedied as soon as we can.

The linked PR is not the cause; the actual cause is #7332. @sujeet14108 can you spend some time to troubleshoot?

[HirdayGupta]

@wkurniawan07 I've noticed across several other PRs that this error goes away over multiple Travis test tries (see #7389). However, in the ones linked above, it remains even after all test tries. How is it that the tests behave in an inconsistent manner?

[whipermr5]

Related to #7455? The inconsistency might be due to the slowness of JDO.

[wkurniawan07]

Could very well be. I haven't troubleshot and perhaps will not.

[whipermr5]

Subsuming under #7455.