Description of problem:
After a guest domain has been created and then shut down from inside with
  /sbin/reboot -f
the domain does not shutdown cleanly; and furthermore, xend seems to corrupt its
internal state, as subsequent "xm list" commands fail with Xen protocol errors.

Version-Release number of selected component (if applicable):
xen-3.0.1-0.20060208.fc5.2
kernel-xen-hypervisor-2.6.15-1.1969_FC5

How reproducible:
100% (on x86_64, have not tried i386 yet.)

Steps to Reproduce:
1. xm create -c $guest 
2. Inside guest, run (as root) /sbin/reboot -f
3. Inside dom0, "xm list"
  
Actual results:
xm list crashes

Expected results:
xm list should not crash.

Additional info: 
Doing a "service xend restart" restores normal service.

The "xm list" traceback is:

[root@dhcp83-39 ~]# xm list
Unexpected error: xen.xend.XendProtocol.XendError

Please report to xen-devel.com
Traceback (most recent call last):
  File "/usr/sbin/xm", line 10, in ?
    main.main(sys.argv)
  File "/usr/lib64/python2.4/site-packages/xen/xm/main.py", line 906, in main
    rc = cmd(args)
  File "/usr/lib64/python2.4/site-packages/xen/xm/main.py", line 356, in xm_list
   doms = getDomains(params)
  File "/usr/lib64/python2.4/site-packages/xen/xm/main.py", line 332, in getDomains
    return server.xend_list_domains()
  File "/usr/lib64/python2.4/site-packages/xen/xend/XendClient.py", line 200, in
xend_list_domains
    return self.xendGet(self.domainurl(), {'detail': '1'})
  File "/usr/lib64/python2.4/site-packages/xen/xend/XendClient.py", line 150, in
xendGet
    return self.client.xendGet(url, args)
  File "/usr/lib64/python2.4/site-packages/xen/xend/XendProtocol.py", line 92,
in xendGet
    return self.xendRequest(url, "GET", args)
  File "/usr/lib64/python2.4/site-packages/xen/xend/XendProtocol.py", line 182,
in xendRequest
    resp.reason)
  File "/usr/lib64/python2.4/site-packages/xen/xend/XendProtocol.py", line 112,
in handleStatus
    return self.handleException(XendError(message))
  File "/usr/lib64/python2.4/site-packages/xen/xend/XendProtocol.py", line 138,
in handleException
    raise err
xen.xend.XendProtocol.XendError: Internal server error