BUG: Small window of downtime when changing config variables or redeploying to Heroku #4
Description
Overview
There is a small window of downtime when Etherpad config variables are changed or a redeploy happens.
Thoughts
Citizen OS API had small downtime issues, we fixed them using the Preboot (https://devcenter.heroku.com/articles/preboot) feature of Heroku BUT I think this CANNOT be used for Etherpad as Preboot runs old and new instance in parallel, but EP does not support horizontal scaling due to not being stateless - it keeps patches in memory and flushes them to DB from time-to-time.
TODO
- Find out what causes the downtime and fix it, IF possible