Well it looks like it's almost a year later.. However, I just ran into the same problem and found this post.
We happen to be talking about this now.. Here's what I have found for this error.
From reading above..
With respect to Primary's the first 5 hosts are all primaries when configured in a cluster. (ESX3.5, VCenter 2.5)
These start with the first host added to the cluster.
If you have 6 hosts and one fails one of the remaining hosts will promote the remaining (6th) host to a primary member.
To view the current primary's for your systems
cat /var/log/vmware/aam/aam_config_util_listprimaries.log
What resolved this problem "No Active Primaries Found" for me was to
open SSH to the host having the problem.
type "hostname" and press return to view the current host name.. (mine was incorrect (not matching the DNS record).
If the host name needs to change you can change this is the VI Client under host configuration, DNS Settings, Host Name
The other way was to open SSH
nano /etc/hosts (Edit/verify the hostname FQDN and shortname)
nano /etc/sysconfig/network (edit verify the name)
hostname newhostname
Again I had to reboot to fully resolve this so HA would enable.
Hopefully this helps others..
Regards,
Mark
