ModelDB keeps DB connections open

[ravishetye]

slack report : https://verta-community.slack.com/archives/CJEQSLPMM/p1597778769118400

Hey guys,
Has anyone run into database connection issues?
I have modeldb running in a k8s cluster, and every couple of days I have to kill the backend pod because it uses a lot of connections to the DB. To the point where I get the error
FATAL: remaining connection slots are reserved for non-replication superuser connections
Some other info:
Azure Postgres DB
Images:
  vertaaiofficial/modeldb-backend:2.0.8
  vertaaiofficial/modeldb-proxy:2.0.8