[Gluster-users] geo-replication fails on CentOS 6.5, gluster v 3.5.2

[Kingsley]

Hi,

That does appear to be at least part of the problem. I'm not using any
Windowsy stuff, but my test script does create files that may then soon
be renamed or deleted (which could happen in our production
environment).

I've put more detail into my reply to Aravinda's email, in case you
wanted to cross check anything with your own findings. It seems there's
already a patch available, as per Aravinda's reply.

Cheers,
Kingsley.

On Sat, 2014-09-27 at 23:48 +0100, James Payne wrote:
> Not sure but is this the same as bug
> https://bugzilla.redhat.com/show_bug.cgi?id=1141379
> 
> I have seen similar behaviour but in my case it was shown up due to using
> Samba and every time a user created a folder (Windows calls it New Folder)
> and renamed it quickly the Geo Rep version became instantly incorrect.
> 
> James
> 
> 
> -----Original Message-----
> From: Kingsley [mailto:gluster at gluster.dogwind.com] 
> Sent: 27 September 2014 00:16
> To: gluster-users at gluster.org
> Subject: [Gluster-users] geo-replication fails on CentOS 6.5, gluster v
> 3.5.2
> 
> Hi,
> 
> I'm new to gluster so forgive me if I'm being an idiot. I've searched the
> list archives back to May but haven't found the exact issue I've come
> across, so I thought I'd ask on here.
> 
> Firstly, I'd like to thank the people working on this project. I've found
> gluster to be pretty simple to get going and it seems to work pretty well so
> far. It looks like it will be a good fit for the application I have in mind,
> if we can get geo-replication to work reliably.
> 
> Now on to my problem ...
> 
> I've set up an additional gluster volume and configured geo-replication to
> replicate the master volume to it using the instructions here:
> 
> https://github.com/gluster/glusterfs/blob/master/doc/admin-guide/en-US/markd
> own/admin_distributed_geo_rep.md
> 
> To keep things simple while it was all new to me and I was just testing, I
> didn't want to add confusion by thinking about using non-privileged accounts
> and mountbroker and stuff so I just set everything up to use root.
> 
> Anyway, I mounted the master volume and slave on a client machine (I didn't
> modify the content of the slave volume, I just mounted it so that I could
> check things were working).
> 
> When I manually create or delete a few files and wait 60 seconds for
> replication to do its thing, it seems to work fine.
> 
> However, when I hit it with a script to simulate intense user activity,
> geo-replication breaks. I deleted the geo-replication and removed the slave
> volume, then re-created and re-enabled geo-replication several times so that
> I could start again from scratch. Each time, my script (which just creates,
> renames and deletes files in the master volume via a glusterfs mount) runs
> for barely a minute before geo-replication breaks.
> 
> I tried this with the slave volume containing just one brick, and also with
> it containing 2 bricks replicating each other. Each time, it broke.
> 
> On the slave, I noticed that the geo-replication logs contained entries like
> these:
> 
> [2014-09-26 16:32:23.995539] W [fuse-bridge.c:1214:fuse_err_cbk]
> 0-glusterfs-fuse: 6384: SETXATTR()
> /.gfid/5f9b6d20-a062-4168-9333-8d28f2ba2d57 => -1 (File exists)
> [2014-09-26 16:32:23.995798] W [client-rpc-fops.c:256:client3_3_mknod_cbk]
> 0-gv2-slave-client-0: remote operation failed: File exists. Path:
> <gfid:855b5eda-f694-487c-adae-a4723fe6c316>/msg000002
> [2014-09-26 16:32:23.996042] W [fuse-bridge.c:1214:fuse_err_cbk]
> 0-glusterfs-fuse: 6385: SETXATTR()
> /.gfid/855b5eda-f694-487c-adae-a4723fe6c316 => -1 (File exists)
> [2014-09-26 16:32:24.550009] W [fuse-bridge.c:1911:fuse_create_cbk]
> 0-glusterfs-fuse: 6469: /.gfid/05a27020-5931-4890-9b74-a77cb1aca918 => -1
> (Operation not permitted)
> [2014-09-26 16:32:24.550533] W [defaults.c:1381:default_release]
> (-->/usr/lib64/glusterfs/3.5.2/xlator/mount/fuse.so(+0x1e7d0)
> [0x7fb2ebd1e7d0]
> (-->/usr/lib64/glusterfs/3.5.2/xlator/mount/fuse.so(free_fuse_state+0x93)
> [0x7fb2ebd07063] (-->/usr/lib64/libglusterfs.so.0(fd_unref+0x10e)
> [0x7fb2eef36fbe]))) 0-fuse: xlator does not implement release_cbk
> 
> I also noticed that at some point, rsync was returning error code 23.
> 
> Now ... I noted from the page I linked above that it requires rsync version
> 3.0.7 and the version that ships with CentOS 6.5 is, wait for it ... 3.0.6.
> Is this going to be the issue, or is the problem something else?
> 
> If you need more logs, let me know. If you need a copy of my client script
> that breaks it, let me know that and I'll send it along.
> 
> --
> Cheers,
> Kingsley.
> 
> 
>