Note: This log excerpt is an example. Date, time, and environmental variables may vary depending on your environment.
This issue occurs due to vapi endpoint memory leak.
This issue is resolved in vSphere 6.0 U3, available at VMware Downloads.
Alternatively, to resolve this issue, you can upgrade to vSphere 6.5 GA, available at VMware Downloads.
To work around this issue, restart the vapi endpoint service and vpxd service in vCenter Server.