VM stuck in "Migrating From" state

Issue

• Virtual machine is stuck in a Migrating state. All other VMs on the same host are in the Unknown state. All VMs except the migrating VM appear to be responding and performing normally.

• VM stuck in Migrating From state.

• Attempts to cancel the migration failed.

• The amount of free memory on the host on which thw VM was running was decreasing.

• There were many CROND and python /usr/share/rhn/virtualization/poller.pyc running;

5     0   460  4877  20   0  40300  1688 pipe_w S    ?          0:00 CROND
0     0   462   460  20   0 263252 22172 unix_w Ss   ?          0:00 python /usr/share/rhn/virtualization/poller.pyc
5     0   524  4877  20   0  40300  1688 pipe_w S    ?          0:00 CROND
0     0   526   524  20   0 263248 22164 unix_w Ss   ?          0:00 python /usr/share/rhn/virtualization/poller.pyc
5     0   735  4877  20   0  40300  1688 pipe_w S    ?          0:00 CROND
0     0   737   735  20   0 263256 22172 unix_w Ss   ?          0:00 python /usr/share/rhn/virtualization/poller.pyc
5     0   880  4877  20   0  40300  1688 pipe_w S    ?          0:00 CROND
0     0   882   880  20   0 263252 22172 unix_w Ss   ?          0:00 python /usr/share/rhn/virtualization/poller.pyc
5     0  1168  4877  20   0  40300  1688 pipe_w S    ?          0:00 CROND
0     0  1170  1168  20   0 263252 22172 unix_w Ss   ?          0:00 python /usr/share/rhn/virtualization/poller.pyc

..... etc., etc., .....