Vm goes to shutdown state while trying to create snapshot ; Build 2197 mainline

Steps to recreate :

1. Launch a vm
2. Take snapshot using openstack ui
3.Image goes to deleted state.
4.Again try to take snapshot .
5. vm goes to error state.
6. No snapshot gets generated .

setup info :
env.roledefs = {
    'all': [host1, host2, host3],
    'cfgm': [host1],
    'openstack': [host1],
    'control': [host1, host2],
    'compute': [host2, host3],
    'collector': [host1],
    'webui': [host2],
    'database': [host1],
    'build': [host_build],
}

env.hostnames = {
    'all': ['nodeg25', 'nodea10', 'nodeh6']
}

Please see attached snapshot .