We're running two clusters of ArcGIS for Server Enterprise (Windows) 10.3.1 on VMware vSphere 5 (ESXi 5.5) running Windows Server 2008R2 SP1 (64-bit). For the past three days we are seeing repeated crashes with all servers going down together. From the VM console we're seeing the CPUs spike to 100% and stay there until the VMs become unresponsive. Server logs are empty. The only commonality between the servers in these two clusters is a common config-store. On the ArcGIS side we haven't changed any configurations in recent days. On the VM side we're told nothing has changed in recent days. Can a corrupted config-store cause servers to fail? Can someone identify which process within ArcGIS controls communication with the config-store?