After 30 min and still zuul shows "Queue lengths: 0 events, 0 results" where I hoped for [1], [2] to show some life signs I'll probably can assume that Jenkins died again (after yesterday's incident bug 49294).
I'll leave the severity to be decided by someone else but this is getting a bit awkward now having two days in a row issues with Jenkins.
[1] https://gerrit.wikimedia.org/r/#/c/61171/
[2] https://gerrit.wikimedia.org/r/#/c/60092/
Version: wmf-deployment
Severity: critical