[sheepdog] [RFC PATCH] object cache: revert object_cache_pull() to older version

[Yibin Shen]

hmm, I can reproduce this issue by followed steps:

1) insert a base image to sheep cluster.
2) clone 2 ~ 3 vm per each host.
3) start all vm simultaneously.

then I can see the random return value

On Tue, Jun 5, 2012 at 6:22 PM, MORITA Kazutaka
<morita.kazutaka at lab.ntt.co.jp> wrote:
> At Tue, 05 Jun 2012 16:43:05 +0800,
> Liu Yuan wrote:
>>
>> On 06/04/2012 04:53 PM, MORITA Kazutaka wrote:
>>
>> > One possibility is that if forward_write_obj_req() fails before
>> > receiving data, the next forward_(read|write)_obj_req() could be
>> > interleaved.
>> >
>> > The below untested patch may fix the problem though the approach is a
>> > poor way.
>>
>>
>> This fix doesn't fix anything.
>
> I think my patch will fix the bug I said above, though it doesn't fix
> your problem.
>
>> I wrote a workaround: use connect_to()
>> inside forward_write_obj_req(), and close(fd) when out of function. The
>> problem is gone.
>
> I have no idea why the problem happens for now.  I've not reproduced
> it yet on my environment.
>
> Thanks,
>
> Kazutaka
> --
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> sheepdog at lists.wpkg.org
> http://lists.wpkg.org/mailman/listinfo/sheepdog

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