Gluster users - May 2011 - hangs on accessing files on gluster mount (3.2.0)

I've deployed glusterfs 3.2.0 in distributed replica mode, but it is 
very problematic.

Every now and then, clients accessing certain files just hang.

For example:

md5sum /home/glusterfs/www/storage/article/2307/15064.jpeg


The file is ~8k bytes big, so such operation should return almost 
immediately. It never returns.


md5sum is just an example, but it causes huge problems to apache, which 
just hangs when trying to read such a file; number of processes grows, 
memory usage grows, until the server stops responding.


The only way to "fix" this is to kill glusterfs and mount it again.

Is it a known issue? I'm seeing it on all gluster clients, so it doesn't
seem to be any isolated issue.

It is a new 3.2.0 installation, not an upgrade.


-- 
Tomasz Chmielewski
http://wpkg.org

Hi Tomasz,

Can you attach the logfiles, that will help. When does it happen - Does this
happen just after the mount? What is the state of the server processes (are they
busy or idle)?

Junaid 
----- Original Message -----
> From: "Tomasz Chmielewski" <mangoo at wpkg.org>
> To: "Gluster General Discussion List" <gluster-users at
gluster.org>
> Sent: Monday, May 9, 2011 4:07:41 PM
> Subject: [Gluster-users] hangs on accessing files on gluster mount (3.2.0)
> I've deployed glusterfs 3.2.0 in distributed replica mode, but it is
> very problematic.
> 
> Every now and then, clients accessing certain files just hang.
> 
> For example:
> 
> md5sum /home/glusterfs/www/storage/article/2307/15064.jpeg
> 
> 
> The file is ~8k bytes big, so such operation should return almost
> immediately. It never returns.
> 
> 
> md5sum is just an example, but it causes huge problems to apache,
> which
> just hangs when trying to read such a file; number of processes grows,
> memory usage grows, until the server stops responding.
> 
> 
> The only way to "fix" this is to kill glusterfs and mount it
again.
> 
> Is it a known issue? I'm seeing it on all gluster clients, so it
> doesn't
> seem to be any isolated issue.
> 
> It is a new 3.2.0 installation, not an upgrade.
> 
> 
> --
> Tomasz Chmielewski
> http://wpkg.org
> _______________________________________________
> Gluster-users mailing list
> Gluster-users at gluster.org
> http://gluster.org/cgi-bin/mailman/listinfo/gluster-users