apt update breaks running instance and result in 504 Gateway Time-out Errors

[vardumper]

Actual behavior

Environment is Ubuntu18, Nginx. After apt upgrade, wiki repeatedly stops being accessible. Resulting in Gateway 504 or 502 Errors. Restarting nginx, wiki, mongosd does not solve the problem.

Expected behavior

• wiki keeps running as it should be

Steps to reproduce the behavior

• have a proxy_pass in Nginx pointing to port 3000
• start mongos
• start wiki.js
• do a apt update && apt upgrade

[vardumper]

actually I restarted mongod with a wrong dbpath, when done correctly wiki.js revives. But the problem in general is real. apt breaks running instance.