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[Bug 1242366] Re: volume attach failed if attach again to an pause to active VM

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** Also affects: nova/icehouse
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1242366

Title:
  volume attach failed if attach again to an pause to active VM

Status in OpenStack Compute (Nova):
  Fix Released
Status in OpenStack Compute (nova) icehouse series:
  New

Bug description:
  Steps are as following:
  1) Create one VM
  2) Attach volume to the VM
  3) pause the VM
  4) detach the volume
  5) unpause the VM
  6) re-attch the VM to same device, nova compute throw exception

  2013-10-20 23:21:22.520 DEBUG amqp [-] Channel open from (pid=19728) _open_ok /usr/local/lib/python2.7/dist-packages/amqp-1.0.12-py2.7.egg/amqp/channel.py:420
  2013-10-20 23:21:22.520 ERROR nova.openstack.common.rpc.amqp [req-5f0d786e-1273-4611-b0a5-a787754c6bc8 admin admin] Exception during message handling
  2013-10-20 23:21:22.520 TRACE nova.openstack.common.rpc.amqp Traceback (most recent call last):
  2013-10-20 23:21:22.520 TRACE nova.openstack.common.rpc.amqp   File "/opt/stack/nova/nova/openstack/common/rpc/amqp.py", line 461, in _process_data
  2013-10-20 23:21:22.520 TRACE nova.openstack.common.rpc.amqp     **args)
  2013-10-20 23:21:22.520 TRACE nova.openstack.common.rpc.amqp   File "/opt/stack/nova/nova/openstack/common/rpc/dispatcher.py", line 172, in dispatch
  2013-10-20 23:21:22.520 TRACE nova.openstack.common.rpc.amqp     result = getattr(proxyobj, method)(ctxt, **kwargs)
  2013-10-20 23:21:22.520 TRACE nova.openstack.common.rpc.amqp   File "/opt/stack/nova/nova/exception.py", line 90, in wrapped
  2013-10-20 23:21:22.520 TRACE nova.openstack.common.rpc.amqp     payload)
  2013-10-20 23:21:22.520 TRACE nova.openstack.common.rpc.amqp   File "/opt/stack/nova/nova/exception.py", line 73, in wrapped
  2013-10-20 23:21:22.520 TRACE nova.openstack.common.rpc.amqp     return f(self, context, *args, **kw)
  2013-10-20 23:21:22.520 TRACE nova.openstack.common.rpc.amqp   File "/opt/stack/nova/nova/compute/manager.py", line 244, in decorated_function
  2013-10-20 23:21:22.520 TRACE nova.openstack.common.rpc.amqp     pass
  2013-10-20 23:21:22.520 TRACE nova.openstack.common.rpc.amqp   File "/opt/stack/nova/nova/compute/manager.py", line 230, in decorated_function
  2013-10-20 23:21:22.520 TRACE nova.openstack.common.rpc.amqp     return function(self, context, *args, **kwargs)
  2013-10-20 23:21:22.520 TRACE nova.openstack.common.rpc.amqp   File "/opt/stack/nova/nova/compute/manager.py", line 272, in decorated_function
  2013-10-20 23:21:22.520 TRACE nova.openstack.common.rpc.amqp     e, sys.exc_info())
  2013-10-20 23:21:22.520 TRACE nova.openstack.common.rpc.amqp   File "/opt/stack/nova/nova/compute/manager.py", line 259, in decorated_function
  2013-10-20 23:21:22.520 TRACE nova.openstack.common.rpc.amqp     return function(self, context, *args, **kwargs)
  2013-10-20 23:21:22.520 TRACE nova.openstack.common.rpc.amqp   File "/opt/stack/nova/nova/compute/manager.py", line 3649, in attach_volume
  2013-10-20 23:21:22.520 TRACE nova.openstack.common.rpc.amqp     context, instance, mountpoint)
  2013-10-20 23:21:22.520 TRACE nova.openstack.common.rpc.amqp   File "/opt/stack/nova/nova/compute/manager.py", line 3644, in attach_volume
  2013-10-20 23:21:22.520 TRACE nova.openstack.common.rpc.amqp     mountpoint, instance)
  2013-10-20 23:21:22.520 TRACE nova.openstack.common.rpc.amqp   File "/opt/stack/nova/nova/compute/manager.py", line 3690, in _attach_volume
  2013-10-20 23:21:22.520 TRACE nova.openstack.common.rpc.amqp     connector)
  2013-10-20 23:21:22.520 TRACE nova.openstack.common.rpc.amqp   File "/opt/stack/nova/nova/compute/manager.py", line 3680, in _attach_volume
  2013-10-20 23:21:22.520 TRACE nova.openstack.common.rpc.amqp     encryption=encryption)
  2013-10-20 23:21:22.520 TRACE nova.openstack.common.rpc.amqp   File "/opt/stack/nova/nova/virt/libvirt/driver.py", line 1107, in attach_volume
  2013-10-20 23:21:22.520 TRACE nova.openstack.common.rpc.amqp     raise exception.DeviceIsBusy(device=disk_dev)
  2013-10-20 23:21:22.520 TRACE nova.openstack.common.rpc.amqp DeviceIsBusy: The supplied device (vdb) is busy.
  2013-10-20 23:21:22.520 TRACE nova.openstack.common.rpc.amqp 
  ^C2013-10-20 23:21:24.871 INFO nova.openstack.common.service [-] Caught SIGINT, exiting

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