Hi Everyone, I'm having an issue with one of my hosts. I was performing a yum update when the box crashed and rebooted, which left a lot of packages broken. I resolved the issue by running "yum reinstall" on all the packages that were in the update, but since then VDSM won't start. I can't find any error message as to why it won't start, just that it won't. IE, I see this in /var/log/messages: Apr 13 07:57:09 ovirt-01 ovirt-ha-agent: WARNING:ovirt_hosted_engine_ha.agent.agent.Agent:Restarting agent, attempt '5' Apr 13 07:57:09 ovirt-01 ovirt-ha-agent: INFO:ovirt_hosted_engine_ha.agent.hosted_engine.HostedEngine:Found certificate common name: ovirt-01.local.domain Apr 13 07:57:09 ovirt-01 ovirt-ha-agent: INFO:ovirt_hosted_engine_ha.agent.hosted_engine.HostedEngine:Initializing VDSM Apr 13 07:57:09 ovirt-01 journal: ovirt-ha-agent ovirt_hosted_engine_ha.agent.agent.Agent ERROR Service vdsmd is not running and the admin is responsible for starting it. Waiting... Apr 13 07:57:09 ovirt-01 ovirt-ha-agent: ERROR:ovirt_hosted_engine_ha.agent.agent.Agent:Service vdsmd is not running and the admin is responsible for starting it. Waiting... And this in /var/log/vdsmd/mom.log (vdsmd.log is a 0 byte file) 2016-04-13 07:58:07,958 - mom - INFO - MOM starting 2016-04-13 07:58:07,992 - mom.HostMonitor - INFO - Host Monitor starting 2016-04-13 07:58:07,992 - mom - INFO - hypervisor interface vdsmxmlrpc 2016-04-13 07:58:08,089 - mom.vdsmInterface - ERROR - Cannot connect to VDSM! [Errno 111] Connection refused 2016-04-13 07:58:08,090 - mom.GuestManager - INFO - Guest Manager starting: multi-thread 2016-04-13 07:58:08,105 - mom.Policy - INFO - Loaded policy '00-defines' 2016-04-13 07:58:08,109 - mom.vdsmInterface - ERROR - Cannot connect to VDSM! [Errno 111] Connection refused 2016-04-13 07:58:08,169 - mom.Policy - INFO - Loaded policy '02-balloon' 2016-04-13 07:58:08,263 - mom.Policy - INFO - Loaded policy '03-ksm' 2016-04-13 07:58:08,339 - mom.HostMonitor - INFO - HostMonitor is ready 2016-04-13 07:58:08,380 - mom.Policy - INFO - Loaded policy '04-cputune' 2016-04-13 07:58:08,381 - mom.PolicyEngine - INFO - Policy Engine starting 2016-04-13 07:58:08,383 - mom.RPCServer - INFO - Using unix socket /var/run/vdsm/mom-vdsm.sock 2016-04-13 07:58:08,383 - mom.RPCServer - INFO - RPC Server starting 2016-04-13 07:58:08,884 - mom.RPCServer - INFO - RPC Server ending Can anyone give me some ideas of how to debug this? Or even some docs on how to properly remove the host from the manager app and re-register the guest to see if that fixes things up.