Hi, What versions are you running? There's been some changes regarding electing of master in newer versions to rely on XenServer HA instead of CloudStack electing a new master so you might take a look at this good article from Remi: http://blog.remibergsma.com/2015/05/23/making-xenserver-and-cloudstack-sing-and-dance-together-again/
Shouldn't be a problem if you're running one of those CloudStack versions. At least I haven't experienced any problems doing this previously. -thinktwo
