we were able to resolve it by optimizing the cluster configuration. ======= Use the Administration Portal to optimize the usage of memory and CPUs at the cluster level: Select the Optimization tab of the New Cluster or Edit Cluster window. Choose a setting for Memory Optimization: None - Disable memory overcommit Disables memory page sharing, which allows you to commit 100% of the physical memory to virtual machines. For Server Load - Allow scheduling of 150% of physical memory Sets memory page sharing threshold to 150% of the system memory on each host. For Desktop Load - Allow scheduling of 200% of physical memory Sets memory page sharing threshold to 200% of the system memory on each host. ======================