Description of problem:
Running REX job on 100 hosts results on some of them with the following error:
~~~
Failed to initialize: PG::ConnectionBad - FATAL: remaining connection slots are reserved for non-replication superuser connections
~~~

Version-Release number of selected component (if applicable):
6.8.6

How reproducible:
unsure

Steps to Reproduce:
1.
2.
3.

Actual results:
~~~
Failed to initialize: PG::ConnectionBad - FATAL: remaining connection slots are reserved for non-replication superuser connections
~~~

Expected results:
No errors

Additional info: