Hi Nitin,
Please provide answers for below questions.
How the issue started ?
Are you attaching vCenter to vCloud for first time ?
What is the version of vCloud and vCenter and DB (SQL/Oracle)
Check the vCloud-Container-info and debug logs and search the keyword WFU, it should be stuck on a loop and should be looking for a value.
Can you upload the vCloud-debug and vcloud-info logs here ? (you can find it in /opt/vmware/vcloud-director/logs.)