the VM machines stopped due to a lack of disk space on the datastore
No configuration has been changed on Vsphere but an error message pops occasionally and says that the VM machines stopped due to a lack of disk space on the datastore. Nothing can then be done apart from restarting the server physically and start the vm machines again. I erased all vm snapshots so as to clear space but no space appears to be cleared. I also cleared space on the guest servers as well to no avail.