First of all, you are running a relative old version of vSphere. First thing I recommend doing is right clicking on each host in the cluster and select "reconfigure for HA". This should flush those warnings. These warnings are nothing to be concerned about (VMware Knowledge Base and VMware Knowledge Base ). We used to have a bug where these warnings would appear without reason.
moved it to the HA section
First of all, you are running a relative old version of vSphere. First thing I recommend doing is right clicking on each host in the cluster and select "reconfigure for HA". This should flush those warnings. These warnings are nothing to be concerned about (VMware Knowledge Base and VMware Knowledge Base ). We used to have a bug where these warnings would appear without reason.
Just thinking about this, it could be that at some point in time your hosts were all isolated from the network, which would trigger this restart try behavior potentially. Just clear all the events:
To clear the alarm from the virtual machine: