Check the resources used by your VM versus that of the node. I saw a similar error and the issue was due to the VM requiring more memory than the node had available.
Setup:
Proxmox 4.0 beta
3 node HA using DRBD9 and watchdog fence. Works great.
Possible issue:
LV raw format images on DRBD9 storage are apparently not being refreshed in the "contents" view of the GUI. If a vm is destroyed, the disk image is cleared correctly. If a vm is created and the...