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[Xen-users] xend does not start "No space left..."

To: xen-users@xxxxxxxxxxxxxxxxxxx
Subject: [Xen-users] xend does not start "No space left..."
From: Oliver Heil <o.heil@xxxxxxxxxxxxxxxxxx>
Date: Wed, 07 Mar 2007 10:00:26 +0100
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Hi XEN Users and Developers,

xend does not start into a clean state. The process is running...

#ps -efl | grep xen
1 S root        20    19  0  70  -5 -     0 xenwat Mar06 ?        00:00:00 
[xenwatch]
1 S root        21    19  0  70  -5 -     0 xb_rea Mar06 ?        00:00:00 
[xenbus]
5 S root     12663     1  0  76   0 -  1274 -      09:56 ?        00:00:00 
xenstored --pid-file /var/run/xenstore.pid
5 S root     12667     1  0  84   0 -  3552 stext  09:56 ?        00:00:00 
xenconsoled
1 S root     12671     1  0  79   0 - 13265 wait   09:56 ?        00:00:00 
python /usr/sbin/xend start
5 S root     12673 12671  0  76   0 - 15412 184466 09:56 ?        00:00:00 
python /usr/sbin/xend start

...but no virtual machine can be started and xm answers e.g with this:
# xm list
Error: Unable to connect to xend: No such file or directory. Is xend running?

In the xend.log there is the following error:
[2007-03-07 09:56:13 xend 12659] WARNING (XendAuthSessions:27) python-pam is 
required for XenAPI support.
[2007-03-07 09:56:13 xend 12673] INFO (SrvDaemon:322) Xend Daemon started
[2007-03-07 09:56:13 xend 12673] INFO (SrvDaemon:326) Xend changeset: 
unavailable.
[2007-03-07 09:56:13 xend 12673] INFO (SrvDaemon:333) Xend version: Unknown.
[2007-03-07 09:56:13 xend.XendDomainInfo 12673] DEBUG (XendDomainInfo:121) 
XendDomainInfo.recreate({'max_vcpu_id': 3, 'cpu_time': 11
74593321820L, 'ssidref': 0, 'hvm': 0, 'shutdown_reason': 0, 'dying': 0, 
'online_vcpus': 4, 'domid': 0, 'paused': 0, 'crashed': 0, 'r
unning': 1, 'maxmem_kb': 17179869180, 'shutdown': 0, 'mem_kb': 3985144, 
'handle': [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
'blocked': 0, 'name': 'Domain-0'})
[2007-03-07 09:56:13 xend.XendDomainInfo 12673] INFO (XendDomainInfo:135) 
Recreating domain 0, UUID 00000000-0000-0000-0000-00000000
0000. at /local/domain/0
[2007-03-07 09:56:13 xend.XendDomainInfo 12673] WARNING (XendDomainInfo:149) 
/local/domain/0/vm is missing. recreate is confused, tr
ying our best to recover
[2007-03-07 09:56:13 xend.XendDomainInfo 12673] DEBUG (XendDomainInfo:1714) 
Storing VM details: {'on_xend_stop': 'ignore', 'shadow_m
emory': '0', 'uuid': '00000000-0000-0000-0000-000000000000', 'name': 
'Domain-0', 'on_reboot': 'restart', 'on_poweroff': 'destroy', '
on_xend_start': 'ignore', 'on_crash': 'restart', 'xend/restart_count': '0', 
'vcpus': '4', 'vcpu_avail': '15', 'memory': '3892', 'max
mem': '16777216'}
[2007-03-07 09:56:13 xend 12673] ERROR (SrvDaemon:344) Exception starting xend 
((28, 'No space left on device, while writing /vm/000
00000-0000-0000-0000-000000000000/xend/restart_count : 0'))
Traceback (most recent call last):
  File "//usr/lib64/python/xen/xend/server/SrvDaemon.py", line 336, in run
    servers = SrvServer.create()
  File "//usr/lib64/python/xen/xend/server/SrvServer.py", line 226, in create
    root.putChild('xend', SrvRoot())
  File "//usr/lib64/python/xen/xend/server/SrvRoot.py", line 40, in __init__
    self.get(name)
  File "//usr/lib64/python/xen/web/SrvDir.py", line 82, in get
    val = val.getobj()
  File "//usr/lib64/python/xen/web/SrvDir.py", line 52, in getobj
    self.obj = klassobj()
  File "//usr/lib64/python/xen/xend/server/SrvDomainDir.py", line 41, in 
__init__
    self.xd = XendDomain.instance()
  File "//usr/lib64/python/xen/xend/XendDomain.py", line 1399, in instance
    inst.init()
  File "//usr/lib64/python/xen/xend/XendDomain.py", line 116, in init
    dom0 = XendDomainInfo.recreate(dom0info, True)
  File "//usr/lib64/python/xen/xend/XendDomainInfo.py", line 174, in recreate
    vm._storeVmDetails()
  File "//usr/lib64/python/xen/xend/XendDomainInfo.py", line 1716, in 
_storeVmDetails
    self._writeVm(to_store)
  File "//usr/lib64/python/xen/xend/XendDomainInfo.py", line 672, in _writeVm
    return xstransact.Write(self.vmpath, *args)
  File "//usr/lib64/python/xen/xend/xenstore/xstransact.py", line 302, in Write
    complete(path, lambda t: t.write(*args))
  File "//usr/lib64/python/xen/xend/xenstore/xstransact.py", line 354, in 
complete
    result = f(t)
  File "//usr/lib64/python/xen/xend/xenstore/xstransact.py", line 302, in 
<lambda>
    complete(path, lambda t: t.write(*args))
  File "//usr/lib64/python/xen/xend/xenstore/xstransact.py", line 87, in write
    self._write(key, d[key])
  File "//usr/lib64/python/xen/xend/xenstore/xstransact.py", line 75, in _write
    ('%s, while writing %s : %s' %
RuntimeError: (28, 'No space left on device, while writing 
/vm/00000000-0000-0000-0000-000000000000/xend/restart_count : 0')
[2007-03-07 09:56:13 xend 12675] WARNING (XendAuthSessions:27) python-pam is 
required for XenAPI support.

Does somebody know a cure for this behaviour?

With regards,

Oli

--
/////////////////////////////////
Oliver Heil

DKFZ - Deutsches Krebsforschungszentrum
Im Neuenheimer Feld 515
69120 Heidelberg

Tel    (+49 6221) / 42 4708

Email  o.heil@xxxxxxx
WWW    www.dkfz.de
/////////////////////////////////



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