Performance issues on one node of our free MongoDB cluster

09:27 UTC - Monitoring agent on one of the nodes stopped responding then started responding again a few seconds afterwards. We put it on a random network error. 09:39 UTC - Some users start to have issues using their free add-on. 09:40 UTC - We investigate. It turns out that the mongodb process was not really listening to incoming connections anymore. 09:42 UTC - We try to restart the service. 09:46 UTC - We actually reboot the whole VM. 09:47 UTC - The VM is up and running, the mongodb process is cleaning itself up. 09:50 UTC - The mongodb process finishes its cleanup and starts accepting connections again.