I am running xen 3.2-1 (Debian 3.2.1-2) on Debian Lenny
(2.6.26-2-xen-amd64 #1 SMP Wed Mar 10) on two identical production
systems.
This morning on one of the systems, xentop stopped displaying. Running
xentop results in:
unable to open xenstore
: Connection refused
Failed to initialize xenstat library
xm list:
Error: (9, ''Bad file descriptor'')
xm dmseg:
Error: Subcommand dmseg not found!
The DomUs appear to be running fine, I just can''t monitor or control
them. Do I need to be concerned of the DomUs stability?
I have found numerous links relating to the same symptoms, but no
solution other than a reboot. What causes this problem?
As they are running critical services on a production system, my last
resort would be rebooting the Dom0. Is there anything else I can do?
Please help!
Steve
/var/log/xen/xend.log:
[2010-05-25 09:04:40 4256] ERROR (xmlrpclib2:178) Internal error
handling xend.domains_with_state
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 66, in domains_with_state
domains = XendDomain.instance().list_sorted(state)
File "/usr/lib/xen-3.2-1/lib/python/xen/xend/XendDomain.py", line
837,
in list_sorted
doms = self.list(state)
File "/usr/lib/xen-3.2-1/lib/python/xen/xend/XendDomain.py", line
807,
in list
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: (32, ''Broken pipe'')
All the same (xen) processes are running on both machines:
ps waux|grep xen
root 63 0.0 0.0 0 0 ? S< May19 0:00
[xenwatch]
root 64 0.0 0.0 0 0 ? S< May19 0:00
[xenbus]
root 4251 0.0 0.4 95068 9312 ? S May19 0:00
python /usr/lib/xen-3.2-1/bin/xend start
root 4254 0.0 0.0 21624 1868 ? S May19
0:02 /usr/lib/xen-3.2-1/bin/xenconsoled
root 4256 0.0 1.3 301436 28804 ? Sl May19 4:37
python /usr/lib/xen-3.2-1/bin/xend start
root 24361 0.0 0.0 5164 796 pts/7 S+ 12:13 0:00 grep
xen
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