I'm wondering if it is possible that your problem is related to mine. Earlier today I had to restart one of our domUs on one of our systems. I used xm shutdown instead of xm destroy and then did xm list to determine if the domU had shutdown or not. Upon issuing xm list a second time, the entire server crashed and rebooted.
I've checked the logs and have yet to find anything. I've attached a transcript of the commands as I executed them on the server. The system is running CentOS 5.3 x64 w/Xen (kernel 2.6.18-128.1.6.el5xen).
Any thoughts?
Thanks,
Matt
--
Mathew S. McCarrell
Clarkson University '10
mccarrms@xxxxxxxxx
mccarrms@xxxxxxxxxxxx
2009/4/7 Maros Timko <timkom@xxxxxxxxx>
Hi all,thanks to all for valuable replies.It seems like we identified the issue. We assured that it is not HW related as it was already reproduced on different machines and platforms, with different BIOS versions.We are running a system performance/statistics collector that executes "xentop" command on Dom0 regularly. This is causing issues. If we execute:xentop -b -d 0.1 > /dev/nullin multiple instances, it will freeze the system.It was reproduced on CentOS 5.3 (kernel-xen-2.6.18-128.1.6.el5) system.There is created a bug for this issue:With regards,Tino2009/4/3 Maros TIMKO <timko@xxxxxxxx>
Hi all,
we are running CentOS 5.2 Xen virtualization system with the latest CentOS packages with couple of VMs on DELL PowerEdge. "Sometimes" the whole machine freezes without anything in log files, anything on the console. "Sometimes" really means we cannot define why or when. Sometimes the machine was idle with just one VM, sometimes quite busy with couple of VMs.
Has anybody had the same experience? If yes, any hints on how to resolve it or how to trace the cause?
Thanks.
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[mccarrms@isengard ~]$ ssh xen1
___
__ _____ ___ < /
\ \ / -_) _ \/ /
/_\_\\__/_//_/_/
Last login: Mon Apr 27 11:26:22 2009 from isengard.cslabs.clarkson.edu
[mccarrms@xen1 ~]$ sudo xm list
We trust you have received the usual lecture from the local System
Administrator. It usually boils down to these three things:
#1) Respect the privacy of others.
#2) Think before you type.
#3) With great power comes great responsibility.
Password:
Sorry, try again.
Password:
Name ID Mem(MiB) VCPUs State Time(s)
Domain-0 0 9899 8 r----- 12458.2
atp 11 255 1 -b---- 72748.8
auth 1 127 1 -b---- 121.7
autoguilt 2 255 1 -b---- 523.2
dukr 3 255 1 -b---- 770.4
list 5 255 1 -b---- 191.4
management 6 255 1 -b---- 517.4
osp1 7 255 1 -b---- 70.4
osp2 8 255 1 -b---- 68.8
tremulous 9 255 1 -b---- 397287.4
[mccarrms@xen1 ~]$ xm console atp
ERROR Internal error: Could not obtain handle on privileged command interface (13 = Permission denied)
Error: Most commands need root access. Please try again as root.
[mccarrms@xen1 ~]$ sudo xm console atp
Out of Memory: Kill process 2626 (TreeLimitedRun) score 96585 and children.
Out of memory: Killed process 2627 (spectrum).
Out of Memory: Kill process 2694 (TreeLimitedRun) score 96565 and children.
Out of memory: Killed process 2695 (spectrum).
Out of Memory: Kill process 2914 (TreeLimitedRun) score 96210 and children.
Out of memory: Killed process 2915 (spectrum).
Out of Memory: Kill process 3014 (TreeLimitedRun) score 96153 and children.
Out of memory: Killed process 3015 (spectrum).
Out of Memory: Kill process 3018 (TreeLimitedRun) score 96177 and children.
Out of memory: Killed process 3019 (spectrum).
Out of Memory: Kill process 4466 (spectrum) score 189626 and children.
Out of memory: Killed process 4466 (spectrum).
Out of Memory: Kill process 6324 (TreeLimitedRun) score 96129 and children.
Out of memory: Killed process 6325 (spectrum).
Out of Memory: Kill process 10680 (TreeLimitedRun) score 96147 and children.
Out of memory: Killed process 10681 (spectrum).
Out of Memory: Kill process 10800 (TreeLimitedRun) score 96167 and children.
Out of memory: Killed process 10801 (spectrum).
Out of Memory: Kill process 10852 (TreeLimitedRun) score 96159 and children.
Out of memory: Killed process 10853 (spectrum).
Out of Memory: Kill process 10856 (TreeLimitedRun) score 96218 and children.
Out of memory: Killed process 10857 (spectrum).
[mccarrms@xen1 ~]$ xm shutdown atp
ERROR Internal error: Could not obtain handle on privileged command interface (13 = Permission denied)
Error: Most commands need root access. Please try again as root.
[mccarrms@xen1 ~]$ sudo xm shutdown atp
[mccarrms@xen1 ~]$ sudo xm list
Name ID Mem(MiB) VCPUs State Time(s)
Domain-0 0 9899 8 r----- 12459.1
atp 11 255 1 -b---- 72749.6
auth 1 127 1 -b---- 121.7
autoguilt 2 255 1 -b---- 523.2
dukr 3 255 1 -b---- 770.4
list 5 255 1 -b---- 191.4
management 6 255 1 -b---- 517.4
osp1 7 255 1 -b---- 70.4
osp2 8 255 1 -b---- 68.8
tremulous 9 255 1 -b---- 397287.4
[mccarrms@xen1 ~]$ sudo xm list
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