Recently had a problem with a DHCP server no leasing out DHCP address randomly. Restarting the service would not fix this , the only thing that would bring it back would be a server restart.
The last entry in the log files would be a Renew. The DHCP database looked fine. There was a DHCP Memory leak in the event log.
The server assigned address for over 1500 Clients , however it was using the E1000 Adapter , once we changed this to VMXNET 3 it resolved the issue
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