Hang at 'rbd info <image>'

Hang at 'rbd info <image>'

[Eric_YH_Chen]

Hi, all:

    I met a situation that ceph system would hang at ‘rbd info <image>.
　　Only can reproduced on one image. 
　　How can I know what happened? Is there any log that I can provide to you for analysis? Thanks!

Re: Hang at 'rbd info <image>'

[Tommi Virtanen]

On Sun, Dec 18, 2011 at 19:32,  <Eric_YH_Chen@wistron.com> wrote:
> Hi, all:
>
>     I met a situation that ceph system would hang at ‘rbd info <image>.
> 　　Only can reproduced on one image.
> 　　How can I know what happened? Is there any log that I can provide to you for analysis? Thanks!

That would happen if the object that stores the rbd image header would
be unreachable. Is your cluster healthy ("ceph health", "ceph -s")?
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RE: Hang at 'rbd info <image>'

[Eric_YH_Chen]

Hi, Tommi:

   The health of ceph is 'HEALTH_OK'.

   Do you want to see any other information of ceph cluster?  

    I also tried these two command but no use.

   `ceph osd repair *`
   `ceph osd scrub *`

    And I also cannot map the rbd image to rbd device. 

    Is there any solution to fix it? I cannot access the rbd image anymore.

    Thanks!
   

-----Original Message-----
From: Tommi Virtanen [mailto:tommi.virtanen@dreamhost.com] 
Sent: Tuesday, December 20, 2011 3:02 AM
To: Eric YH Chen/WHQ/Wistron
Cc: ceph-devel@vger.kernel.org; Chris YT Huang/WHQ/Wistron; Alex Lee/WHQ/Wistron
Subject: Re: Hang at 'rbd info <image>'

On Sun, Dec 18, 2011 at 19:32,  <Eric_YH_Chen@wistron.com> wrote:
> Hi, all:
>
>     I met a situation that ceph system would hang at ‘rbd info <image>.
> 　　Only can reproduced on one image.
> 　　How can I know what happened? Is there any log that I can provide to you for analysis? Thanks!

That would happen if the object that stores the rbd image header would
be unreachable. Is your cluster healthy ("ceph health", "ceph -s")?

Re: Hang at 'rbd info <image>'

[Yehuda Sadeh Weinraub]

On Thu, Dec 29, 2011 at 1:49 AM,  <Eric_YH_Chen@wistron.com> wrote:
> Hi, Tommi:
>
>   The health of ceph is 'HEALTH_OK'.
>
>   Do you want to see any other information of ceph cluster?
>
>    I also tried these two command but no use.
>
>   `ceph osd repair *`
>   `ceph osd scrub *`
>
>    And I also cannot map the rbd image to rbd device.
>
>    Is there any solution to fix it? I cannot access the rbd image anymore.
>

What does 'ceph -s' say?

Yehuda
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