We are using Zeppelin 0.6.0 as a self-service for our clients to query our PostgreSQL databases. We are noticing that the connections are not closing after each one of them are done. What is the normal operating procedure to have these connections close when idle? Our scope for the JDBC interpreter is “shared”, which I thought would make 1 connection for all notebooks. It would seem that I am wrong. Anyone have any ideas on what would help?