SUSE Manager 3: virtual-host-gatherer not working

Hello,

I’m trying to get the virtual-host-gatherer on SUSE Manager 3 up and running. vCenter and ESX is 5.5. Entered all information according to the poor documentation.
After pressing the “Refresh data from this Virtual Host Manager” button nothing happens.

rhn_taskomatic_daemon.log says:
[FONT=Courier New]INFO | jvm 1 | 2016/09/29 11:31:32 | 2016-09-29 11:31:32,096 [DefaultQuartzScheduler_Worker-6] ERROR com.suse.manager.gatherer.GathererRunner - Error while calling the virtual-host-gatherer, exit code 1
INFO | jvm 1 | 2016/09/29 11:31:32 | 2016-09-29 11:31:32,096 [DefaultQuartzScheduler_Worker-6] ERROR com.suse.manager.gatherer.GathererRunner - Please check the virtual-host-gatherer logfile.
INFO | jvm 1 | 2016/09/29 11:31:32 | 2016-09-29 11:31:32,120 [DefaultQuartzScheduler_Worker-6] WARN com.redhat.rhn.taskomatic.task.matcher.MatcherJob - Gatherer-matcher bunch was run for a specific Virtual Host Manager. NOT running matcher.[/FONT]

And gatherer.log (I think this is the one meant by “virtual-host-gatherer logfile”):
[FONT=Courier New]2016-09-29 11:31:31,993 root - WARNING: Scanning began[/FONT]

How can I troubleshoot this problem?

Thanks and regards
Tim

Thinking about a network problem I used tcpdump to gather some information on the packets send by virtual-host-gatherer but there was nothing – not even a single SYN. Therefore the problem seems to reside somewhere on the SUMa server itself.

Has been a strange firewall configuration outside of SUSE Manager.