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[Hans Lindgren <1180670@xxxxxxxxxxxxxxxxxx>]

Just happend on the gate at http://logs.openstack.org/12/52312/1/check
/gate-nova-python27/571e82b/console.html

A quick search with logstash confirms that this has started to happen frequently over the last couple of days.
Logstash query: @message:"FAIL: nova.tests.virt.xenapi.test_xenapi.XenAPIVMTestCase.test_instance_snapshot_fails_with_no_primary_vdi"

** Changed in: nova
       Status: Invalid => Confirmed

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https://bugs.launchpad.net/bugs/1180670

Title:
  XenAPIVMTestCase.test_instance_snapshot_fails_with_no_primary_vdi
  sometimes fails

Status in OpenStack Compute (Nova):
  Confirmed

Bug description:
  Sometimes
  XenAPIVMTestCase.test_instance_snapshot_fails_with_no_primary_vdi
  fails. It always seems to succeed on its own, but ocassionally fails
  on a full test run.

  ======================================================================
  FAIL: nova.tests.test_xenapi.XenAPIVMTestCase.test_instance_snapshot_fails_with_no_primary_vdi
  tags: worker-3
  ----------------------------------------------------------------------
  Empty attachments:
    stderr
    stdout

  pythonlogging:'': {{{
  Loading network driver 'nova.network.linux_net'
  Loading network driver 'nova.network.linux_net'
  Fast cloning is only supported on default local SR of type ext. SR on this system was found to be of type lvm. Ignoring the cow flag.
  No agent build found for xen/linux/x86-64
  Instance agent version: 1.0
  }}}

  Traceback (most recent call last):
    File "nova/tests/test_xenapi.py", line 501, in test_instance_snapshot_fails_with_no_primary_vdi
      lambda *args, **kwargs: None)
  MismatchError: <bound method XenAPIDriver.snapshot of <nova.virt.xenapi.driver.XenAPIDriver object at 0x9f7b610>> returned None
  ======================================================================

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