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[yatin <1979047@xxxxxxxxxxxxxxxxxx>]

** Also affects: neutron
   Importance: Undecided
       Status: New

** Changed in: neutron
   Importance: Undecided => High

** Changed in: neutron
       Status: New => Triaged

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https://bugs.launchpad.net/bugs/1979047

Title:
  Interface attach fails with libvirt.libvirtError: internal error:
  unable to execute QEMU command                'netdev_add': File
  descriptor named '(null)' has not been found

Status in neutron:
  Triaged
Status in OpenStack Compute (nova):
  Triaged

Bug description:
  The tempest-integrated-compute-centos-9-stream job is broken since
  2022-06-16 02:26:37 [1]. Multiple interface attach tempest test fails
  with:

  libvirt.libvirtError: internal error: unable to execute QEMU command
  'netdev_add': File descriptor named '(null)' has not been found

  Full exception stack trace:

  [None req-6f95599e-022a-42ab-a4de-07c7b8f73daf tempest-
  AttachInterfacesTestJSON-2035965943 tempest-
  AttachInterfacesTestJSON-2035965943-project] [instance:
  b41513e6-cb4e-4441-af14-c272393cdafb] attaching network adapter
  failed.: libvirt.libvirtError: internal error: unable to execute QEMU
  command 'netdev_add': File descriptor named '(null)' has not been
  found

  Jun 17 08:25:43.545335 centos-9-stream-ovh-bhs1-0030065283 nova-
  compute[70195]: ERROR nova.virt.libvirt.driver [instance:
  b41513e6-cb4e-4441-af14-c272393cdafb] Traceback (most recent call
  last):

  Jun 17 08:25:43.545335 centos-9-stream-ovh-bhs1-0030065283 nova-
  compute[70195]: ERROR nova.virt.libvirt.driver [instance:
  b41513e6-cb4e-4441-af14-c272393cdafb]   File
  "/opt/stack/nova/nova/virt/libvirt/driver.py", line 2850, in
  attach_interface

  Jun 17 08:25:43.545335 centos-9-stream-ovh-bhs1-0030065283 nova-
  compute[70195]: ERROR nova.virt.libvirt.driver [instance:
  b41513e6-cb4e-4441-af14-c272393cdafb]     guest.attach_device(cfg,
  persistent=True, live=live)

  Jun 17 08:25:43.545335 centos-9-stream-ovh-bhs1-0030065283 nova-
  compute[70195]: ERROR nova.virt.libvirt.driver [instance:
  b41513e6-cb4e-4441-af14-c272393cdafb]   File
  "/opt/stack/nova/nova/virt/libvirt/guest.py", line 321, in
  attach_device

  Jun 17 08:25:43.545335 centos-9-stream-ovh-bhs1-0030065283 nova-
  compute[70195]: ERROR nova.virt.libvirt.driver [instance:
  b41513e6-cb4e-4441-af14-c272393cdafb]
  self._domain.attachDeviceFlags(device_xml, flags=flags)

  Jun 17 08:25:43.545335 centos-9-stream-ovh-bhs1-0030065283 nova-
  compute[70195]: ERROR nova.virt.libvirt.driver [instance:
  b41513e6-cb4e-4441-af14-c272393cdafb]   File
  "/usr/local/lib/python3.9/site-packages/eventlet/tpool.py", line 193,
  in doit

  Jun 17 08:25:43.545335 centos-9-stream-ovh-bhs1-0030065283 nova-
  compute[70195]: ERROR nova.virt.libvirt.driver [instance:
  b41513e6-cb4e-4441-af14-c272393cdafb]     result =
  proxy_call(self._autowrap, f, *args, **kwargs)

  Jun 17 08:25:43.545335 centos-9-stream-ovh-bhs1-0030065283 nova-
  compute[70195]: ERROR nova.virt.libvirt.driver [instance:
  b41513e6-cb4e-4441-af14-c272393cdafb]   File
  "/usr/local/lib/python3.9/site-packages/eventlet/tpool.py", line 151,
  in proxy_call

  Jun 17 08:25:43.545335 centos-9-stream-ovh-bhs1-0030065283 nova-
  compute[70195]: ERROR nova.virt.libvirt.driver [instance:
  b41513e6-cb4e-4441-af14-c272393cdafb]     rv = execute(f, *args,
  **kwargs)

  Jun 17 08:25:43.545335 centos-9-stream-ovh-bhs1-0030065283 nova-
  compute[70195]: ERROR nova.virt.libvirt.driver [instance:
  b41513e6-cb4e-4441-af14-c272393cdafb]   File
  "/usr/local/lib/python3.9/site-packages/eventlet/tpool.py", line 132,
  in execute

  Jun 17 08:25:43.545335 centos-9-stream-ovh-bhs1-0030065283 nova-
  compute[70195]: ERROR nova.virt.libvirt.driver [instance:
  b41513e6-cb4e-4441-af14-c272393cdafb]     six.reraise(c, e, tb)

  Jun 17 08:25:43.545335 centos-9-stream-ovh-bhs1-0030065283 nova-
  compute[70195]: ERROR nova.virt.libvirt.driver [instance:
  b41513e6-cb4e-4441-af14-c272393cdafb]   File
  "/usr/local/lib/python3.9/site-packages/six.py", line 719, in reraise

  Jun 17 08:25:43.545335 centos-9-stream-ovh-bhs1-0030065283 nova-
  compute[70195]: ERROR nova.virt.libvirt.driver [instance:
  b41513e6-cb4e-4441-af14-c272393cdafb]     raise value

  Jun 17 08:25:43.545335 centos-9-stream-ovh-bhs1-0030065283 nova-
  compute[70195]: ERROR nova.virt.libvirt.driver [instance:
  b41513e6-cb4e-4441-af14-c272393cdafb]   File
  "/usr/local/lib/python3.9/site-packages/eventlet/tpool.py", line 86,
  in tworker

  Jun 17 08:25:43.545335 centos-9-stream-ovh-bhs1-0030065283 nova-
  compute[70195]: ERROR nova.virt.libvirt.driver [instance:
  b41513e6-cb4e-4441-af14-c272393cdafb]     rv = meth(*args, **kwargs)

  Jun 17 08:25:43.545335 centos-9-stream-ovh-bhs1-0030065283 nova-
  compute[70195]: ERROR nova.virt.libvirt.driver [instance:
  b41513e6-cb4e-4441-af14-c272393cdafb]   File
  "/usr/lib64/python3.9/site-packages/libvirt.py", line 706, in
  attachDeviceFlags

  Jun 17 08:25:43.545335 centos-9-stream-ovh-bhs1-0030065283 nova-
  compute[70195]: ERROR nova.virt.libvirt.driver [instance:
  b41513e6-cb4e-4441-af14-c272393cdafb]     raise
  libvirtError('virDomainAttachDeviceFlags() failed')

  Jun 17 08:25:43.545335 centos-9-stream-ovh-bhs1-0030065283 nova-
  compute[70195]: ERROR nova.virt.libvirt.driver [instance:
  b41513e6-cb4e-4441-af14-c272393cdafb] libvirt.libvirtError: internal
  error: unable to execute QEMU command 'netdev_add': File descriptor
  named '(null)' has not been found

  Example run:
  https://zuul.opendev.org/t/openstack/build/129de28a7a374013a03070f0742c46ac/log/controller/logs/screen-
  n-cpu.txt?severity=4

  libvirt version: libvirt x86_64  8.4.0-1.el9
  qemu version: qemu-kvm x86_64  17:7.0.0-4.el9 

  [1]https://zuul.opendev.org/t/openstack/builds?job_name=tempest-
  integrated-compute-centos-9-stream&skip=0

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