Recently the server is always unstable!

A 502 error means the back-end server that powers your site is not working. This can be caused by any number of things.

Please submit a support ticket so we can discuss the server, the account, and all the other details required to troubleshoot a 502.

I got recently a couple of similar problems, i found my Web site down !!! and discover that the Apache2 server including peripheral server like Celery or Rabbitmq Server were down too, and had to restart them every Day... I have added in Cron an automatic Discover of Broken server and add an @Hourly restart in order to avoid this damned "502 bad gateway". Also since 3 Days i got when attempting to login over SSH to the Linux Server : "fork resource temporarily unavailable", which is probably in relation to a memory shortage due itself to Insufficient resources required by Apache2 (Number Thread were increased recently) and Various Cron and Background Tasks which are running in background process.