Xen users - Feb 2009 - Help. Xen service cannot start, and no log left

Hi, all:

  Xen cannot start after installation. When using command "# xend
start" ,
the whole system becomes very slow and tardy to accept other commands. I use
"top" to check resource, slow response, and find "xend"
occupy more than 50%
cpu. Frequent harddisk reading. Then "top" process is killed, and so
does
"xend" process.

  Nothing is left in "/var/log/xen/xend.log", this file''s
size is 0.

  "xm list" command: *Error: Unable to connect to xend: No such file
or
directory. Is xend running?*

  xen version: xen-3.3.1
  os: centOS 4.4
  The installation follows official tutorial.

  Thanks for the help!

Xin


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Yang Xin wrote:
> Hi, all:
> 
>   Xen cannot start after installation. When using command "# xend
start"
> , the whole system becomes very slow and tardy to accept other commands.
> I use "top" to check resource, slow response, and find
"xend" occupy
> more than 50% cpu. Frequent harddisk reading. Then "top" process
is
> killed, and so does "xend" process.
> 
>   Nothing is left in "/var/log/xen/xend.log", this
file''s size is 0.
> 
>   "xm list" command: /Error: Unable to connect to xend: No such
file or
> directory. Is xend running?/
> 
>   xen version: xen-3.3.1
>   os: centOS 4.4
>   The installation follows official tutorial.
> 
>   Thanks for the help!
> 
> Xin
Xin,

I had a similar issue the other week where, after a kernel upgrade, the
lines in my grub.conf got rewritten and that was causing the same
results with xend not starting.

I would suggest running a yum remove xen* followed by yum install xen*

Reinstalling xen, followed by a reboot corrected my issues. I also noted
that the lines in my grub.conf were rewritten correctly during the xen
reinstall.

HTH


--
Ryan Duff
web: http://www.ryanduff.net
aim: ryancduff
twitter: ryancduff

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Yang Xin wrote:
> 
> Here is my grub file:
> title Xen-3.0 (RHEL4)
>         root (hd0,0)
>         kernel /boot/xen-3.0.gz dom0_mem=262144
>         module /boot/xen-syms-3.0.2-2 root=/dev/sda1 ro console=tty0
>         module /boot/xen-3.0.2.img
> 
Here''s what I have:

title CentOS (2.6.18-92.1.22.el5xen)
        root (hd0,0)
        kernel /xen.gz-3.3.1
        module /vmlinuz-2.6.18-92.1.22.el5xen ro root=/dev/Linux/CentOS
        module /initrd-2.6.18-92.1.22.el5xen.img


--
Ryan Duff
web: http://www.ryanduff.net
aim: ryancduff
twitter: ryancduff

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