Re: [Xen-API] RE: [Xen-users] Re: [XCP] cdrommon issue

[George Shuklin <george.shuklin@xxxxxxxxx>]

I think, this can be hardware problem. Check drives health (if drives
are not in hardware RAID, use smartctl from smartmontools), run simplest
dd if=/dev/drive_name of=/dev/null bs=64k to see if all sectors of disk
are accessible.


Ð ÐÑÐ, 18/08/2010 Ð 15:22 +0200, cluster@xxxxxxxx ÐÐÑÐÑ:
> Hi Dave,
> 
> thanks a lot for your answer.
> 
> I tried to comment out cdrommon line from xenservices, i didn't reboot the
> machine instead i restarted xen-api by using xe-toolstack-restart.
> 
> After restarting toolstack, as always, 2 processes VGS first and, after
> killing it, LVM second consume 99% of cpu!
> 
> This problem is the same that affect the operation of live migration and
> startup/poweroff and that jeopardize the possibility to restart the
> physical host.
> 
> Do you know a safe way to restart cdrommon without restarting the physical
> server? Where can i submit the bug and should i report any other
> information?
> 
> Many thanks and regards,
> Francesco 
> 
> 
> On Wed, 18 Aug 2010 13:42:33 +0100, Dave Scott <Dave.Scott@xxxxxxxxxxxxx>
> wrote:
> > Hi,
> > 
> > I've heard other reports of cdrommon going crazy but I don't think anyone
> > has filed a bug yet. Can you try commenting it out from
> > /etc/init.d/xenservices?
> > 
> > Cheers,
> > Dave
> > 
> >> -----Original Message-----
> >> From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx [mailto:xen-users-
> >> bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of cluster@xxxxxxxx
> >> Sent: 14 August 2010 17:23
> >> To: xen-users@xxxxxxxxxxxxxxxxxxx
> >> Cc: gallo@xxxxxxxxxx
> >> Subject: [Xen-users] Re: [XCP] cdrommon issue
> >> 
> >> 
> >> Hi all,
> >> 
> >> this problem is still present also in XCP 0.5
> >> 
> >> After 5 or 6 days of phisical server normal running, the process
> >> cdrommon
> >> start to consume about 97% of cpu causing VMs to become unresponsive.
> >> 
> >> When I kill the process (kill -9 [cdrommon_pid]) operation like migrate
> >> or
> >> start or stop VMs became impossible.
> >> 
> >> Is there a safe way to restart cdrommon?
> >> 
> >> My hardware is DELL PowerEdge 2950. Is there already a bug submission?
> >> 
> >> Thanks for any help, this bug make the system very unstable.
> >> 
> >> Cheers,
> >> Francesco Gallo
> >> 
> >> 
> >> On Thu, 22 Jul 2010 16:25:10 +0200, "Francesco Gallo"
> >> <gallo@xxxxxxxxxx>
> >> wrote:
> >> > Hi all,
> >> >
> >> >
> >> >
> >> > Sometimes the process cdrommon use 99,8% of CPU and the result is
> >> that
> >> all
> >> > vms becames very slow.
> >> >
> >> >
> >> >
> >> > I killed the process and now everything is fine but I can't live
> >> migrate
> >> > VMS.
> >> >
> >> >
> >> >
> >> > I found this problem also in this citrix thread:
> >> >
> >> >
> >> >
> >> > http://forums.citrix.com/thread.jspa?messageID=1475962
> >> >
> >> <http://forums.citrix.com/thread.jspa?messageID=1475962&tstart=0#147596
> >> 2>
> >> > &tstart=0#1475962
> >> >
> >> >
> >> >
> >> > My XCP version is still 0.1.1
> >> >
> >> >
> >> >
> >> > Any solution?
> >> >
> >> >
> >> >
> >> > Regards,
> >> >
> >> > Francesco Gallo
> >> 
> >> _______________________________________________
> >> Xen-users mailing list
> >> Xen-users@xxxxxxxxxxxxxxxxxxx
> >> http://lists.xensource.com/xen-users
> 
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