Found this after some googling. http://comments.gmane.org/gmane.comp.apache.cloudstack.devel/22230
From: Florin Dumitrascu <florin.dumitra...@intunenetworks.com<mailto:florin.dumitra...@intunenetworks.com>> Reply-To: "dev@cloudstack.apache.org<mailto:dev@cloudstack.apache.org>" <dev@cloudstack.apache.org<mailto:dev@cloudstack.apache.org>> Date: Tuesday, June 10, 2014 at 6:23 AM To: "dev@cloudstack.apache.org<mailto:dev@cloudstack.apache.org>" <dev@cloudstack.apache.org<mailto:dev@cloudstack.apache.org>> Subject: [CS 4.3 | XenServer] Unable to start Virtual Router (com.cloud.exception.AgentUnavailableException) due to: getDomRVersionCmd failed