We use docker to run a webapp that connects to an external MS Sql Server database. (Changing to use a SQL docker image is not an option atm.) All of our devs who updated to 17.12 suffered from near-constant database connection drops. Once we downgraded them back to 17.09 (and also tried running outside docker, just fine), things went back to normal and the connections worked fine. Anyone else suffering from a similar issue in 17.12?
It’s intermittent, so it appears that a timeout was decreased or something (like the new HTTP/HTTPS proxies) is adding more overhead and pushing the requests above the timeout. We are still investigating, but restoring to 17.09, everything works like it should.