It's was a typo in the failure message,

that's what I was getting:

*VDSM hostname command GetStatsVDS failed: Connection reset by peer*

On 10/16/2017 03:21 PM, Erekle Magradze wrote:


It's getting clear now, indeed momd service is disabled

● momd.service - Memory Overcommitment Manager Daemon
Loaded: loaded (/usr/lib/systemd/system/momd.service; static; vendor preset: disabled)
   Active: inactive (dead)

mom-vdsm is enable and running.

● mom-vdsm.service - MOM instance configured for VDSM purposes
Loaded: loaded (/usr/lib/systemd/system/mom-vdsm.service; enabled; vendor preset: enabled) Active: active (running) since Mon 2017-10-16 15:14:35 CEST; 1min 3s ago
 Main PID: 27638 (python)
   CGroup: /system.slice/mom-vdsm.service
           └─27638 python /usr/sbin/momd -c /etc/vdsm/mom.conf

The reason why I came up with digging in mom problems is the following problem

*VDSM hostname command GetStatsVDSThanks failed: Connection reset by peer*

that is causing fencing of the node where the failure is happening, what could be the reason of GetStatsVDS failure?

Best Regards

On 10/16/2017 03:11 PM, Martin Sivak wrote:

how do you start MOM? MOM is supposed to talk to vdsm, we do not talk
to libvirt directly. The line you posted comes from vdsm and vdsm is
telling you it can't talk to MOM.

Which MOM service is enabled? Because there are two momd and mom-vdsm,
the second one is the one that should be enabled.

Best regards

Martin Sivak

On Mon, Oct 16, 2017 at 3:04 PM, Erekle Magradze
<>  wrote:
Hi Martin,

Thanks for the answer, unfortunately this warning message persists, does it
mean that mom cannot communicate with libvirt? how critical is it?



On 10/16/2017 03:03 PM, Martin Sivak wrote:

it is just a warning, there is nothing you have to solve unless it
does not resolve itself within a minute or so. If it happens only once
or twice after vdsm or mom restart then you are fine.

Best regards

Martin Sivak
SLA / oVirt

On Mon, Oct 16, 2017 at 2:44 PM, Erekle Magradze
<>  wrote:

after running

systemctl status vdsm I am getting that it's running and this message at

Oct 16 14:26:52 hostname vdsmd[2392]: vdsm throttled WARN MOM not
Oct 16 14:26:52 hostname vdsmd[2392]: vdsm throttled WARN MOM not
KSM stats will be missing.
Oct 16 14:26:57 hostname vdsmd[2392]: vdsm root WARN ping was deprecated
favor of ping2 and confirmConnectivity

how critical it is? and how to solve that warning?

I am using libvirt


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