Comment 0 for bug 1787110

On a unused rabbitmq machine, the server monitoring reports that it was unable to get a value for sockets.

This is not true, except the value is 0. In upstream this is already fixed by replacing !$used by !defined($used) on line 168 in /usr/lib/nagios/plugins-rabbitmq/check_rabbitmq_server

Upstream: https://github.com/nagios-plugins-rabbitmq/nagios-plugins-rabbitmq/blob/master/scripts/check_rabbitmq_server#L191

Description: Ubuntu 16.04.3 LTS
Release: 16.04

nagios-plugins-rabbitmq:
  Installed: 1:1.2.0-2.1
  Candidate: 1:1.2.0-2.1
  Version table:
 *** 1:1.2.0-2.1 500
        500 http://nl.archive.ubuntu.com/ubuntu xenial/universe amd64 Packages
        500 http://nl.archive.ubuntu.com/ubuntu xenial/universe i386 Packages
        100 /var/lib/dpkg/status