Since we updated to Jenkins 2.319.3 our jobs which send a message via the cisco spark notifier plugin as post action never complete. They are hanging forever in the sparkSend step. Only a forcible terminate of the job will end it.

21:08:06  [Pipeline] sparkSend
21:24:58  Aborted by Martin Paatz (mpaatz)
21:25:13  Click here to forcibly terminate running steps
21:28:08  Terminating sparkSend