[Xen-bugs] [Bug 1182] "xm list" fails with "Error: (9, 'Bad file descriptor')"

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http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=1182





------- Comment #4 from ae@xxxxx  2010-08-02 09:00 -------
There was a similar problem.

A few (about 8-10) linux domU domains worked during the week and any action the
server will not until there was specific problem: xm no longer worked, although
domU continued to work as usual.

After reboot everything was in order, but it is very important to know how to
get control of the domU without rebooting.

#uname -r
2.6.26-2-xen-amd64

# cat /etc/debian_version
5.0.5

# python -V
Python 2.5.2

# dpkg -l | grep xen
ii libxenstore3.0 3.2.1-2 Xenstore communications library for Xen
ii linux-image-2.6.26-2-xen-amd64 2.6.26-24 Linux 2.6.26 image on AMD64,
oldstyle Xen support
ii linux-modules-2.6.26-2-xen-amd64 2.6.26-24 Linux 2.6.26 modules on AMD64
ii xen-hypervisor-3.2-1-amd64 3.2.1-2 The Xen Hypervisor on AMD64
ii xen-linux-system-2.6.26-2-xen-amd64 2.6.26-24 XEN system with Linux 2.6.26
image on AMD64
ii xen-shell 1.8-3 Console based Xen administration utility
ii xen-tools 3.9-4 Tools to manage Debian XEN virtual servers
ii xen-utils-3.2-1 3.2.1-2 XEN administrative tools
ii xen-utils-common 3.2.0-2 XEN administrative tools - common files
ii xenstore-utils 3.2.1-2 Xenstore utilities for Xen

xend.log:
=====
[2010-08-01 09:00:19 2917] ERROR (xmlrpclib2:178) Internal error handling
xend.domain
Traceback (most recent call last):
  File "/usr/lib/xen-3.2-1/lib/python/xen/util/xmlrpclib2.py", line 131, in
_marshaled_dispatch
    response = self._dispatch(method, params)
  File "/usr/lib/python2.5/SimpleXMLRPCServer.py", line 415, in _dispatch
    return func(*params)
  File "/usr/lib/xen-3.2-1/lib/python/xen/xend/server/XMLRPCServer.py", line
58, in domain
    info = lookup(domid)
  File "/usr/lib/xen-3.2-1/lib/python/xen/xend/server/XMLRPCServer.py", line
50, in lookup
    info = XendDomain.instance().domain_lookup(domid)
  File "/usr/lib/xen-3.2-1/lib/python/xen/xend/XendDomain.py", line 520, in
domain_lookup
    self._refresh(refresh_shutdown = False)
  File "/usr/lib/xen-3.2-1/lib/python/xen/xend/XendDomain.py", line 396, in
_refresh
    txn = xstransact()
  File "/usr/lib/xen-3.2-1/lib/python/xen/xend/xenstore/xstransact.py", line
29, in __init__
    self.transaction = xshandle().transaction_start()
Error: (9, 'Bad file descriptor')


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