For some reason, we got the following error in our application log. Then both SD and OpManager stopped working. Restarting servicedesk was fine, but not OpManager - we had to reboot the server and now everything is working normally.
Category: wrapper ID: 100
"There were 1 failed launches in a row, each lasting less than 300 seconds. Giving up."
Then another error: "There may be a configuration problem: please check the logs."