CentOS - Mar 2012 - iotop :: OSError: Netlink error: Invalid argument (22)

Hi! i have a problem with iotop :

root at alien: ~ # iotop
Traceback (most recent call last):
  File "/usr/bin/iotop", line 16, in ?
    main()
  File "/usr/lib/python2.4/site-packages/iotop/ui.py", line 567, in
main
    main_loop()
  File "/usr/lib/python2.4/site-packages/iotop/ui.py", line 557, in
<lambda>
    main_loop = lambda: run_iotop(options)
  File "/usr/lib/python2.4/site-packages/iotop/ui.py", line 465, in
run_iotop
    return curses.wrapper(run_iotop_window, options)
  File "/usr/lib64/python2.4/curses/wrapper.py", line 44, in wrapper
    return func(stdscr, *args, **kwds)
  File "/usr/lib/python2.4/site-packages/iotop/ui.py", line 457, in
run_iotop_window
    process_list = ProcessList(taskstats_connection, options)
  File "/usr/lib/python2.4/site-packages/iotop/data.py", line 375, in
__init__
    self.update_process_counts()
  File "/usr/lib/python2.4/site-packages/iotop/data.py", line 431, in
update_process_counts
    stats = self.taskstats_connection.get_single_task_stats(thread)
  File "/usr/lib/python2.4/site-packages/iotop/data.py", line 158, in
get_single_task_stats
    reply = self.connection.recv()
  File "/usr/lib/python2.4/site-packages/iotop/netlink.py", line 229,
in
recv
    raise err
OSError: Netlink error: Invalid argument (22)


CentOS release 5.5 (Final)

iotop-0.4.3-4.el5

python-2.4.3-46.el5

anyone have any idea about this problem and how can i debug/fix it?
Thanks!
Adrian

Dear Adrian,

On Fri, 9 Mar 2012 09:17:59 +0200
Adrian Sevcenco <Adrian.Sevcenco at cern.ch> wrote:
> anyone have any idea about this problem and how can i debug/fix it?
Do you have python-ctypes installed?

Besides iotop does not work for kernels < 2.6.20. You need a patched
kernel. The rpm package from http://guichaz.free.fr/iotop/ works also
on non standard el5 kernels but shows no more information than iostat.

Further information can be found in
https://bugzilla.redhat.com/show_bug.cgi?id=641496 and 
https://bugzilla.redhat.com/show_bug.cgi?id=557062

Brgds


-- 
Freundliche Gruesse/Best Regards
Benjamin Hackl
IT/Administration

Media FOCUS Research Ges.m.b.H.
Maculangasse 8, 1220 Wien Austria
Tel: +43 1 258 97 01-295
b.hackl at focusmr.com

On 9.3.2012 08:17, Adrian Sevcenco wrote:
> Hi! i have a problem with iotop :
> 
> root at alien: ~ # iotop
> Traceback (most recent call last):
>   File "/usr/bin/iotop", line 16, in ?
>     main()
>   File "/usr/lib/python2.4/site-packages/iotop/ui.py", line 567,
in main
>     main_loop()
>   File "/usr/lib/python2.4/site-packages/iotop/ui.py", line 557,
in <lambda>
>     main_loop = lambda: run_iotop(options)
>   File "/usr/lib/python2.4/site-packages/iotop/ui.py", line 465,
in
> run_iotop
>     return curses.wrapper(run_iotop_window, options)
>   File "/usr/lib64/python2.4/curses/wrapper.py", line 44, in
wrapper
>     return func(stdscr, *args, **kwds)
>   File "/usr/lib/python2.4/site-packages/iotop/ui.py", line 457,
in
> run_iotop_window
>     process_list = ProcessList(taskstats_connection, options)
>   File "/usr/lib/python2.4/site-packages/iotop/data.py", line
375, in
> __init__
>     self.update_process_counts()
>   File "/usr/lib/python2.4/site-packages/iotop/data.py", line
431, in
> update_process_counts
>     stats = self.taskstats_connection.get_single_task_stats(thread)
>   File "/usr/lib/python2.4/site-packages/iotop/data.py", line
158, in
> get_single_task_stats
>     reply = self.connection.recv()
>   File "/usr/lib/python2.4/site-packages/iotop/netlink.py", line
229, in
> recv
>     raise err
> OSError: Netlink error: Invalid argument (22)
> 
> 
> CentOS release 5.5 (Final)
Your kernel is too old. You need at least 2.6.18-238.el5 (This was the
first 5.6 kernel)
> iotop-0.4.3-4.el5
> 
> python-2.4.3-46.el5
It seems you have a partially updated system. These Packages are from 5.8



-- 
Kind Regards, Markus Falb

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