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[Launchpad Bug Tracker <1880672@xxxxxxxxxxxxxxxxxx>]

[Expired for OpenStack Compute (nova) because there has been no activity
for 60 days.]

** Changed in: nova
       Status: Incomplete => Expired

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https://bugs.launchpad.net/bugs/1880672

Title:
  Openstack start  instance failed.

Status in OpenStack Compute (nova):
  Expired

Bug description:
  Openstack start instance failed.

  Description
  ===========
  Openstack starts the instance, and after a while the instance is in an error state.

  logs
  =====
   Failed to compute_task_build_instances: No valid host was found. There are not enough hosts available.
  Traceback (most recent call last):

    File "/usr/lib/python2.7/site-packages/oslo_messaging/rpc/server.py", line 150, in inner
      return func(*args, **kwargs)

    File "/usr/lib/python2.7/site-packages/nova/scheduler/manager.py", line 104, in select_destinations
      dests = self.driver.select_destinations(ctxt, spec_obj)

    File "/usr/lib/python2.7/site-packages/nova/scheduler/filter_scheduler.py", line 74, in select_destinations
      raise exception.NoValidHost(reason=reason)

  NoValidHost: No valid host was found. There are not enough hosts
  available.

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