Summary tab error message about datastores hearbeat

In the esxi host i received a message:

The number of heartbeat datastores for host is 1, which is less than required: 2

In my case i had only 1 datastore, and i did not want to see this message so in order to get rid of that i used this kb:

http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1006421

So basically, go to cluster HA settings, and click HA advanced settings button.

Add new advanced property:

das.ignoreinsufficienthbdatastore  with value set to true