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[YaoZheng_ZTE <zheng.yao1@xxxxxxxxxx>]

Public bug reported:

Description:
1.In /nova/compute/manager.py the function _rollback_live_migration, we should be catch exception of 
'remove_volume_connection', let the rollback process continue to clean up other resources. Becaue,the
'remove_volume_connection' will visit cinder, the probability of an exception is relatively large.
2.In /nova/compute/manager.py the function _post_live_migration, we should be catch all exception of 
source host clean up resources. Because the vm has been migrated the dest host, we should try to make sure the vm run normally.

** Affects: nova
     Importance: Undecided
     Assignee: YaoZheng_ZTE (zheng-yao1)
         Status: New

** Changed in: nova
     Assignee: (unassigned) => YaoZheng_ZTE (zheng-yao1)

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https://bugs.launchpad.net/bugs/1582558

Title:
  Live-migration exception handling improvement

Status in OpenStack Compute (nova):
  New

Bug description:
  Description:
  1.In /nova/compute/manager.py the function _rollback_live_migration, we should be catch exception of 
  'remove_volume_connection', let the rollback process continue to clean up other resources. Becaue,the
  'remove_volume_connection' will visit cinder, the probability of an exception is relatively large.
  2.In /nova/compute/manager.py the function _post_live_migration, we should be catch all exception of 
  source host clean up resources. Because the vm has been migrated the dest host, we should try to make sure the vm run normally.

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