Sqlline waits to close while a query submitted thru another client is running

• Submit a long running query via a different client - say the Drill UI.
• Have an existing sqlline connection established.
• Attempt to close the sqlline (using !quit). Appears to hang.
• Cancel the running query (via the Drill UI here)
• Sqlline successfully closes.

It appears sqlline is waiting for the query on the other client to complete. There is no reason for one client to depend on another. If this is the intended behavior, a message must be shown on sqlline informing users about the wait.