Last modified: 2014-08-02 14:35:06 UTC
In one message, jenkins-bot posted only the text "FAILURE", without any links or other info. It posted normal build/test logs in an earlier message: https://gerrit.wikimedia.org/r/#/c/110316/2
Have you seen it anywhere else?
No, not that I recall.
Sorry this bug is too old, we have no log anymore for January. Potentially it was a manual test to ensure some connection. Zuul has no code path I can remember that would make it only report "FAILURE".