After receiving some emails from vCenter that my heartbeat is incorrect I decided to troubleshooting this issue, but after some time but didn’t found a good answer to solve this issue so I called VMware..
[VMware vCenter – Alarm Host error] Error detected on esx51 in [clustername]: Agent can’t send heartbeats.msg size: 1014, sendto() returned: Operation not permitted
– Upgrade your ESX Host firmware;
– You need to reset the default sensors once, goto:
ESX Host > Hardware Status > Select: “System event” log and click Reset Sensor. This will clear the sensor status and recheck the hardware sensors again. If there still some errors please check your hardware, if not.. your fake/hanging warning disappears.