Sometimes MOM fails to stop and has to be killed

[ahadas]

Sometimes on OST, when shutting down VDSM (and thus MOM) it takes MOM too long to stop and it has to be killed. Relevant lines from journalctl.log:

2021-12-07T21:46:17.073054+0100 ost-basic-suite-master-host-0 systemd[1]: Stopping MOM instance configured for VDSM purposes...
2021-12-07T21:46:27.280473+0100 ost-basic-suite-master-host-0 systemd[1]: mom-vdsm.service: State 'stop-sigterm' timed out. Killing.
2021-12-07T21:46:27.281833+0100 ost-basic-suite-master-host-0 systemd[1]: mom-vdsm.service: Killing process 3010 (momd) with signal SIGKILL.
2021-12-07T21:46:27.402996+0100 ost-basic-suite-master-host-0 systemd[1]: mom-vdsm.service: Main process exited, code=killed, status=9/KILL
2021-12-07T21:46:27.403085+0100 ost-basic-suite-master-host-0 systemd[1]: mom-vdsm.service: Failed with result 'timeout'.
2021-12-07T21:46:27.403438+0100 ost-basic-suite-master-host-0 systemd[1]: Stopped MOM instance configured for VDSM purposes.
2021-12-07T21:46:27.405636+0100 ost-basic-suite-master-host-0 systemd[1]: Stopping Virtual Desktop Server Manager...

Original bug: https://bugzilla.redhat.com/2030362