Cannot shut down while users are connected

Error Message

NOTICE: Cannot shut down while users are connected

Explanation

There are still open connections to the database.

Workaround

Make sure that there are no open connections to the database. On each host:

$ netstat | grep 5433

tcp 0 0 host01:5433 host01:33558 ESTABLISHED

tcp 0 0 host01:33558 host01:5433 ESTABLISHED