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[Trung Trinh <trung.t.trinh@xxxxxxxxxxxxxx>]

** Changed in: nova
       Status: In Progress => Invalid

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https://bugs.launchpad.net/bugs/1394545

Title:
  Info of host is None in the "db_instance" returned by the function
  get_db_instance()

Status in OpenStack Compute (Nova):
  Invalid

Bug description:
  Version: stable/juno

  Bug description:
  In the process of launching new VM instance, it is detected that the information of host is None in the "db_instance" returned by the function get_db_instance(). This especially occurs at the beginning of the process of launching new VM when the task_state is SCHEDULING.

  In the function show() or detail() of the class nova.api.openstack.compute.contrib.extended_availability_zone.ExtendedAZController,
  it can be seen this phenomenon together with a remarkable comment: # Likely hasn't reached a viable compute node yet

  Proposal:
  Find out the root cause and fix or add some work-around.

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