[Ocfs2-users] ocfs2 hangs during webserver usage

[Sunil Mushran]

Please do. Provide the kernel/ocfs2 version. Also, I
had mentioned other things in my previous email like
scanlocks, etc. Also, attach complete outputs. Easier
to read raw data. And attach all the outputs.

Stephan Hendl wrote:
> After 9 days without an error we got a further webserver hang last night. Our loadbalancer distributed the requests to 3 servers wcl[2,3,4]. wcl3 got after 9 in the evening more traffic than normal but not very high. At all the time there were no Busy locks - that' the good message. But once wcl3 got higher traffic the webserver processes reported "-D" status with en empty "WIDE-WCHAN-COLUMN" on that server. At the same time the webserver processes at the other two node reported in the "WIDE-WCHAN-COLUMN": ocfs2_wait_for_status_completion.
>
> wcl3 (that one with the traffic):
> ============================
> Thu May  3 21:28:01 CEST 2007
>   PID STAT COMMAND          WIDE-WCHAN-COLUMN
>   417 D    kjournald        wait_on_buffer
> 26451 D    httpd            -
> 26471 D    httpd            -
> 30209 D    httpd            -
> 29227 D    httpd            -
> 24211 D    httpd            wait_on_buffer
> 14600 D    httpd            -
>
> ============================
> Thu May  3 21:30:01 CEST 2007
>   PID STAT COMMAND          WIDE-WCHAN-COLUMN
>  2211 D    kjournald        wait_on_buffer
> 26451 D    httpd            -
> 26471 D    httpd            -
> 30209 D    httpd            -
>   525 D    httpd            -
> 29227 D    httpd            -
> 14600 D    httpd            -
>  2024 Ds   sadc             log_wait_commit
>
> ============================
> Thu May  3 21:32:01 CEST 2007
>   PID STAT COMMAND          WIDE-WCHAN-COLUMN
> 26451 D    httpd            -
> 26455 D    httpd            -
> 26471 D    httpd            -
> 13240 D    httpd            -
> 28115 D    httpd            -
> 30209 D    httpd            -
>   525 D    httpd            -
> 29227 D    httpd            -
> 14600 D    httpd            -
>
>
> wcl2 as well as wcl4:
> ============================
> Thu May  3 21:28:01 CEST 2007
>   PID STAT COMMAND          WIDE-WCHAN-COLUMN
>  4935 D    httpd            o2net_send_message_vec
>
> ============================
> Thu May  3 21:30:01 CEST 2007
>   PID STAT COMMAND          WIDE-WCHAN-COLUMN
> 18590 D    httpd            ocfs2_wait_for_status_completion
>  4935 D    httpd            ocfs2_wait_for_status_completion
>  9507 D    httpd            ocfs2_wait_for_status_completion
> 10643 D    httpd            ocfs2_wait_for_status_completion
> 10310 D    httpd            ocfs2_wait_for_status_completion
> 10334 D    httpd            ocfs2_wait_for_status_completion
>  2434 D    httpd            ocfs2_wait_for_status_completion
>
> ============================
> Thu May  3 21:32:01 CEST 2007
>   PID STAT COMMAND          WIDE-WCHAN-COLUMN
> 18590 D    httpd            ocfs2_wait_for_status_completion
>  4935 D    httpd            ocfs2_wait_for_status_completion
>  9507 D    httpd            ocfs2_wait_for_status_completion
> 10643 D    httpd            ocfs2_wait_for_status_completion
> 10285 D    httpd            ocfs2_wait_for_status_completion
> 10302 D    httpd            ocfs2_wait_for_status_completion
> 10310 D    httpd            ocfs2_wait_for_status_completion
> 10334 D    httpd            ocfs2_wait_for_status_completion
>  2434 D    httpd            ocfs2_wait_for_status_completion
>
> /proc/slabinfo as well as /proc/meminfo is also eavailable. Shell I open a bugzilla case?
>
> Regards
> Stephan
>
>
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