[libvirt] an old bug reappear-TimeoutError

[yue]

hi,
i encounter an error of libvirt, which is reported in 2011.  i intended to update the ticket(spice password) of vm.
 
 
https://bugzilla.redhat.com/show_bug.cgi?id=676205
---------log------------------
Thread-162::ERROR::2013-05-08 13:50:46,000::BindingXMLRPC::909::vdsm::(wrapper) libvirt error
Traceback (most recent call last):
  File "/usr/share/vdsm/BindingXMLRPC.py", line 904, in wrapper
    res = f(*args, **kwargs)
  File "/usr/share/vdsm/BindingXMLRPC.py", line 213, in vmSetTicket
    return vm.setTicket(password, ttl, existingConnAction, params)
  File "/usr/share/vdsm/API.py", line 550, in setTicket
    return v.setTicket(password, ttl, existingConnAction, params)
  File "/usr/share/vdsm/libvirtvm.py", line 2245, in setTicket
    self._dom.updateDeviceFlags(graphics.toxml(), 0)
  File "/usr/share/vdsm/libvirtvm.py", line 524, in f
    raise toe
TimeoutError: Timed out during operation: cannot acquire state change lock


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