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[OpenStack Infra <1544744@xxxxxxxxxxxxxxxxxx>]

Reviewed:  https://review.openstack.org/290156
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=2c52aca7965bf3c9dd4c17b4f7706bdef401463f
Submitter: Jenkins
Branch:    master

commit 2c52aca7965bf3c9dd4c17b4f7706bdef401463f
Author: Sujitha <sujitha.neti@xxxxxxxxx>
Date:   Tue Mar 8 20:57:36 2016 +0000

    Added new exception to handle CinderClientException
    
    When Cinder client exception is thrown in initialize_connection
    (which is called during prechecks for Live migration),
    instance is moved to ERROR state. It is not sensible
    to move the instance to ERROR state when the precheck fails.
    Adding new exception changes this behavior. Instance will be reset
    to Active state when the precheck fails.
    
    Closes bug: #1544744
    
    Change-Id: I7a5fcc070ff53086f37417f12e2b9f383e220747


** Changed in: nova
       Status: In Progress => Fix Released

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https://bugs.launchpad.net/bugs/1544744

Title:
  Live migration with attached volume results in ERROR state and fails
  to rollback when cinder client exception is thrown

Status in OpenStack Compute (nova):
  Fix Released

Bug description:
  During live migration with attached volume, instance is moved to ERROR
  state and stuck in task state Migrating when cinder client exception
  is thrown.

  Steps:
     1. Create a nova instance
     2. Attach a cinder volume
     3. Change the nova code to raise cinderclient exception in
        initialize_connection(). Add the below line in  initialize_connection() 
        in nova/volume/cinder.py.
           raise cinder_exception.ClientException("test","cinder client exception") 
     4. Live migrate instance to other compute node (on a shared storage setup)

  Result:
         * ERROR (ClientException): Unexpected API Error. Please report this at http://bugs.launchpad.net/nova/ and attach the Nova API              log if possible.
         * And instance changes to unrecoverable ERROR state and stuck in migrating task state.

  Error message is expected but instance changing into unrecoverable
  ERROR state should be fixed in my opinion. It has to roll back instead
  of moving to ERROR state.

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