Our vCenter server is running version 6.0 Build 5318200 on a Windows 2012 R2 platform from time to time we having been having issues where the vcenter server will crash leaving a core dump, then recover. It can happen at any time of the day nor active specific. I did open a case with VMware support and they came back with the follow after review all logs. I find it hard to believe that cluster imbalance would cause vCenter to crash
it seems the cluster is inblanced now. There is either a lack cpu or storage for it blance out.
There are a lot of vm's that stats are not valid for. I would also look into upgrading vcenter to 6.0 u3D 7462485 and check into the inblanced on the cluster. I am thinking once that can get worked out and upgraded it should be good.