[Gluster-devel] Problem with clients that goes down..

[Guido Smit]

Krishna,

The problem Antonio describes looks like the same problem I and Daniel described.

Unplugging one of the servers makes the whole cluster hang. I'm also still trying to figure
out what the problem exactly is. I've tried it without the unify translator, but on my cluster,
there is still a problem with the rest of the clients. They are not blocked, but I get a message that
the mountpoint is not connected (transport endpoint is not connected).






Krishna Srinivas wrote:
> Hi Antonio,
>
> Excuse us, somehow your issue was not responded to.
>
> If I understand correctly, you are facing two problems:
> 1) plugging out the cable on one client will make other clients hang
> 2) the timeout value you specify in spec file does not reflect
>    in the actual timeout you see when you access glusterfs.
>
> Is that correct? I have lost track of your setup details. Searching mail
> archives did not give me the exact picture. Can you give the setup
> details with config files? And also the tests?
>
> Surely the problem you are facing should be fixed.
>
> Regards
> Krishna
>
>
> On Mon, Apr 21, 2008 at 3:58 PM, Antonio González
> <antonio.gonzalez at libera.net> wrote:
>   
>> Hello all,
>>
>>
>>
>>  I have made a lot of tests over GlusterFS to verify his viability. I wrote
>>  at this list one or two weeks ago asking about an issue with clients that
>>  goes down and causes problems with other clients that can not access to the
>>  Gluster file system.
>>
>>
>>
>>  Are the developers of GlusterFS noticed about this issue?  I think that is a
>>  serious problem and I need an answer to advice or not the use of GlusterFS
>>  in a project.
>>
>>
>>
>>  I proved this issue over several scenarios (AFR/unify at server side, client
>>  side, without AFR…), and I think that the problem is the unify translator.
>>  I made a test with one server and two clients. Without unify translator
>>  works fine, a client who goes down while reads or copy a file, don't affect
>>  other clients. With the unify translator, if a client who reads/writes file
>>  goes down causes the problem (other clients that tries an "ls" command are
>>  blocked).
>>
>>
>>
>>  I made a test with two servers (without AFR, unify at client side), I have
>>  localized files in each server, I try to block one server and access to a
>>  file in the other server (cp command). I can see that the access to this
>>  server (no blocked) is in function of the timeout option. If I don't set
>>  timeout, the client takes 2 or 3 minutes and not finishes the command. If I
>>  set a timeout of 20 sec the client takes 32 sec and finishes the command.
>>  For a timeout of 40 s. the client takes 60 sec approximately.
>>
>>
>>
>>
>>
>>  I would like to know at least if this problem is recognized by the
>>  developers of Gluster. They know which is problem?  They working to solve
>>  it? .
>>
>>
>>
>>  Thanks,
>>
>>  _______________________________________________
>>  Gluster-devel mailing list
>>  Gluster-devel at nongnu.org
>>  http://lists.nongnu.org/mailman/listinfo/gluster-devel
>>
>>     
>
>
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>
>
>   

-- 
Met vriendelijke groet,

Guido Smit
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