Description:

After upgrading from 0.63.3 to 0.64.0 the RC instances get stuck after a while (30-90 minutes).
They still accept the http connection and the request but never deliver any answers. The http connection stays open forever.

This happens with a single instance as well as a 4 instance cluster.

The info-level logoutput shows nothing special, the 'getting stuck' happens at different times / logoutputs.
No errors in the mongo log either.

Server Setup Information:

• Version of Rocket.Chat Server: 0.64.0
• Operating System: linux
• Deployment Method(snap/docker/tar/etc): docker(-compose)
• Number of Running Instances: 1-4
• DB Replicaset Oplog: yes
• mongoDB Version: 3.2.9

Steps to Reproduce:

1. start your RC and use it
2. chat or wait

Expected behavior:

chat on forever :)

Actual behavior:

after a while the http connections (proxy or not) don't answer