[Fedora-xen] Exception when starting xend: error while reading /vm/00000000-0000-0000-0000-000000000000/ssidref

[Daniele Sgandurra]

I've been using Xen for 3 months, but now I've
problems when starting xend: I'm using Fedora 5 with
Xen installed from binaries (I have also tried with
compiled versions but it doesn't work either):

$ uname -a
Linux localhost.localdomain 2.6.16-xen #1 SMP Mon Jul
3 18:18:42 CEST 2006 i686 i686 i386 GNU/Linux

$ python -V
Python 2.4.3

# xend start
# xm list
Error: Error connecting to xend: No such file or
directory.  Is xend running?

This is the output from /var/log/xend.log:
--------------------------------------------
[2006-09-08 13:42:05 xend] INFO (SrvDaemon:278) Xend
Daemon started
[2006-09-08 13:42:05 xend] INFO (SrvDaemon:282) Xend
changeset: Thu Apr 13 15:18:37 2006 +0100
9617:5802713c159b.
[2006-09-08 13:42:05 xend.XendDomainInfo] DEBUG
(XendDomainInfo:200)
XendDomainInfo.recreate({'paused': 0, 'cpu_time':
30441112756L, 'ssidref': 65537, 'handle': [0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
'shutdown_reason': 0, 'dying': 0, 'dom': 0, 'mem_kb':
429056, 'maxmem_kb': -4, 'max_vcpu_id': 0, 'crashed':
0, 'running': 1, 'shutdown': 0, 'online_vcpus': 1,
'blocked': 0})
[2006-09-08 13:42:05 xend.XendDomainInfo] INFO
(XendDomainInfo:212) Recreating domain 0, UUID
00000000-0000-0000-0000-000000000000.
[2006-09-08 13:42:05 xend.XendDomainInfo] WARNING
(XendDomainInfo:234) (5, 'Input/output error, while
reading
/vm/00000000-0000-0000-0000-000000000000/ssidref')
[2006-09-08 13:42:05 xend] ERROR (SrvDaemon:292)
Exception starting xend ((5, 'Input/output error,
while reading
/vm/00000000-0000-0000-0000-000000000000/ssidref'))
Traceback (most recent call last):
  File
"/xen/xen-3.0.2-2/dist/install/usr/lib/python/xen/xend/server/SrvDaemon.py",
line 286, in run
    servers = SrvServer.create()
  File
"/xen/xen-3.0.2-2/dist/install/usr/lib/python/xen/xend/server/SrvServer.py",
line 108, in create
    root.putChild('xend', SrvRoot())
  File
"/xen/xen-3.0.2-2/dist/install/usr/lib/python/xen/xend/server/SrvRoot.py",
line 40, in __init__
    self.get(name)
  File
"/xen/xen-3.0.2-2/dist/install/usr/lib/python/xen/web/SrvDir.py",
line 82, in get
    val = val.getobj()
  File
"/xen/xen-3.0.2-2/dist/install/usr/lib/python/xen/web/SrvDir.py",
line 52, in getobj
    self.obj = klassobj()
  File
"/xen/xen-3.0.2-2/dist/install/usr/lib/python/xen/xend/server/SrvDomainDir.py",
line 39, in __init__
    self.xd = XendDomain.instance()
  File
"/xen/xen-3.0.2-2/dist/install/usr/lib/python/xen/xend/XendDomain.py",
line 582, in instance
    inst.init()
  File
"/xen/xen-3.0.2-2/dist/install/usr/lib/python/xen/xend/XendDomain.py",
line 77, in init
    True))
  File
"/xen/xen-3.0.2-2/dist/install/usr/lib/python/xen/xend/XendDomainInfo.py",
line 236, in recreate
    vm = XendDomainInfo(xeninfo, domid, dompath, True,
priv)
  File
"/xen/xen-3.0.2-2/dist/install/usr/lib/python/xen/xend/XendDomainInfo.py",
line 435, in __init__
    self.augmentInfo(priv)
  File
"/xen/xen-3.0.2-2/dist/install/usr/lib/python/xen/xend/XendDomainInfo.py",
line 520, in augmentInfo
    self.readVMDetails(entries))
  File
"/xen/xen-3.0.2-2/dist/install/usr/lib/python/xen/xend/XendDomainInfo.py",
line 463, in readVMDetails
    return self.gatherVm(*params)
  File
"/xen/xen-3.0.2-2/dist/install/usr/lib/python/xen/xend/XendDomainInfo.py",
line 606, in gatherVm
    return xstransact.Gather(self.vmpath, *args)
  File
"/xen/xen-3.0.2-2/dist/install/usr/lib/python/xen/xend/xenstore/xstransact.py",
line 305, in Gather
    return complete(path, lambda t: t.gather(*args))
  File
"/xen/xen-3.0.2-2/dist/install/usr/lib/python/xen/xend/xenstore/xstransact.py",
line 325, in complete
    result = f(t)
  File
"/xen/xen-3.0.2-2/dist/install/usr/lib/python/xen/xend/xenstore/xstransact.py",
line 305, in <lambda>
    return complete(path, lambda t: t.gather(*args))
  File
"/xen/xen-3.0.2-2/dist/install/usr/lib/python/xen/xend/xenstore/xstransact.py",
line 179, in gather
    val = self._read(key)
  File
"/xen/xen-3.0.2-2/dist/install/usr/lib/python/xen/xend/xenstore/xstransact.py",
line 49, in _read
    '%s, while reading %s' % (ex.args[1], path))
RuntimeError: (5, 'Input/output error, while reading
/vm/00000000-0000-0000-0000-000000000000/ssidref')
--------------------------------------------

I've tried to re-install Xen from binary or from
source but I cannot get it work.
Any ideas/suggestions?
Thank you very much.



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