[Pkg-xen-devel] Bug#648670: xm was unable determine an actual domU state under some conditions

[Moonwalker]

Package: xen-utils-4.1
Version: 4.1.1-3

I have an HVM domU which was created with xen-utils-4.0 (and Xen 4.0 hypervisor of course). Recently I've upgraded to Xen 4.1 and xen-utils-4.1, but after a reboot I was unable to do anything with it: "xm start" caused "Domain is already running" error, while "xm shutdown" simply hadn't printed any error messages, only "Error:", "xm destroy" did nothing without any output.
In "xm list" output the domU had no ID and state values just like it wasn't started.

===
# xm shutdown test1
Error:
Usage: xm shutdown <Domain> [-waRH]

Shutdown a domain.
===

===
# xm reset test
Error: Domain 'test1' is not started
Usage: xm reset <Domain>
===

===
# xm start test1
Error: Domain is already running
Usage: xm start <DomainName>
===

The only reasonable message was in xend.log, appears when I tried to shutdown the domU:
===
DEBUG (XendDomainInfo:524) XendDomainInfo.shutdown(poweroff)
ERROR (xmlrpclib2:181) Internal error handling xend.domain.shutdown
Traceback (most recent call last):
  File "/usr/lib/xen-4.1/bin/../lib/python/xen/util/xmlrpclib2.py", line 134, in _marshaled_dispatch
    response = self._dispatch(method, params)
  File "/usr/lib/python2.7/SimpleXMLRPCServer.py", line 420, in _dispatch
    return func(*params)
  File "<string>", line 1, in <lambda>
  File "/usr/lib/xen-4.1/bin/../lib/python/xen/xend/server/XMLRPCServer.py", line 56, in dispatch
    return getattr(info, fn)(*args)
  File "/usr/lib/xen-4.1/bin/../lib/python/xen/xend/XendDomainInfo.py", line 533, in shutdown
    self.storeDom("control/shutdown", reason)
  File "/usr/lib/xen-4.1/bin/../lib/python/xen/xend/XendDomainInfo.py", line 1705, in storeDom
    return xstransact.Store(self.dompath, *args)
  File "/usr/lib/xen-4.1/bin/../lib/python/xen/xend/xenstore/xstransact.py", line 347, in Store
    complete(path, lambda t: t.store(*args))
  File "/usr/lib/xen-4.1/bin/../lib/python/xen/xend/xenstore/xstransact.py", line 361, in complete
    t = xstransact(path)
  File "/usr/lib/xen-4.1/bin/../lib/python/xen/xend/xenstore/xstransact.py", line 27, in __init__
    assert path is not None
AssertionError
===

I was able to remove the failed domU only by removing the appropriate directory with config.sxp from /var/lib/xend/domains.