Hmmm.. one particular message
2013-01-17T13:08:39.659Z [06292 info 'vpxdvpxdHostCnx' opID=SWI-7a1cb616] [VpxdHostCnx] No heartbeats received from host 5203136b-c37d-c238-69c3-7101151dae9b within 4398798518000 ms
If there are no heartbeats for 4398798518000ms, i.e 7 mins if I am correct, then can you confirm if the hostd is working in the servers. Do check on var/log/hostd.log and check if the hostd crashes with any information..
I can also suggest to raise a support request with VMware if this is affecting production environment