Today, October 4, 2017, we experienced several jobs failures between 12:07--14:40 PM CEST. One of our worker servers became unresponsive which led to the jobs failures. We have shut down the instance and launched a new one. Everything is working properly now and we will further investigate the root cause of the issue.
UPDATE 09:00 PM CEST
We're still encountering rare job failures. We're monitoring the issue closely and trying to find the root cause.
We are sorry for any inconvenience.