Got vmacore exception: An operation on a socket could not be performed because the system lacked sufficient buffer space or because a queue was full

Hi Folks

   we are not able to connect the vCenter server via vSphere client but able to take RDP of the server. Tried restarted the service but still no luck after rebooted the issue was fixed. But while analysing the vCenter logs i can see "Got vmacore exception: An operation on a socket could not be performed because the system lacked sufficient buffer space or because a queue was full" .After doing deep drive analyse with vmware KB. If the dynamic ports are exhausted we will getting the error message but when i checked in the server, maximum dynamic ports are allowed and also got confirmation from the network team stating that in network also maximum number of dynamic ports allowed.Now I need to check what went wrong

vCenter 5.5

Does anyone came across this issue and any resolution for these apart from rebooting the server.