[Gluster-users] RE : Frequent connect and disconnect messages flooded in logs
Mohammed Rafi K C
rkavunga at redhat.com
Wed Nov 30 05:57:56 UTC 2016
Hi Micha,
I have changed the thread and subject so that your original thread
remain same for your query. Let's try to fix the problem what you
observed with 3.8.4, So I have started a new thread to discuss the
frequent disconnect problem.
*If any one else has experienced the same problem, please respond to the
mail.*
It would be very helpful if you could give us some more logs from
clients and bricks. Also any reproducible steps will surely help to
chase the problem further.
Regards
Rafi KC
On 11/30/2016 04:44 AM, Micha Ober wrote:
> I had opened another thread on this mailing list (Subject: "After
> upgrade from 3.4.2 to 3.8.5 - High CPU usage resulting in disconnects
> and split-brain").
>
> The title may be a bit misleading now, as I am no longer observing
> high CPU usage after upgrading to 3.8.6, but the disconnects are still
> happening and the number of files in split-brain is growing.
>
> Setup: 6 compute nodes, each serving as a glusterfs server and client,
> Ubuntu 14.04, two bricks per node, distribute-replicate
>
> I have two gluster volumes set up (one for scratch data, one for the
> slurm scheduler). Only the scratch data volume shows critical errors
> "[...] has not responded in the last 42 seconds, disconnecting.". So I
> can rule out network problems, the gigabit link between the nodes is
> not saturated at all. The disks are almost idle (<10%).
>
> I have glusterfs 3.4.2 on Ubuntu 12.04 on a another compute cluster,
> running fine since it was deployed.
> I had glusterfs 3.4.2 on Ubuntu 14.04 on this cluster, running fine
> for almost a year.
>
> After upgrading to 3.8.5, the problems (as described) started. I would
> like to use some of the new features of the newer versions (like
> bitrot), but the users can't run their compute jobs right now because
> the result files are garbled.
>
> There also seems to be a bug report with a smiliar problem: (but no
> progress)
> https://bugzilla.redhat.com/show_bug.cgi?id=1370683
>
> For me, ALL servers are affected (not isolated to one or two servers)
>
> I also see messages like "INFO: task gpu_graphene_bv:4476 blocked for
> more than 120 seconds." in the syslog.
>
> For completeness (gv0 is the scratch volume, gv2 the slurm volume):
>
> [root at giant2: ~]# gluster v info
>
> Volume Name: gv0
> Type: Distributed-Replicate
> Volume ID: 993ec7c9-e4bc-44d0-b7c4-2d977e622e86
> Status: Started
> Snapshot Count: 0
> Number of Bricks: 6 x 2 = 12
> Transport-type: tcp
> Bricks:
> Brick1: giant1:/gluster/sdc/gv0
> Brick2: giant2:/gluster/sdc/gv0
> Brick3: giant3:/gluster/sdc/gv0
> Brick4: giant4:/gluster/sdc/gv0
> Brick5: giant5:/gluster/sdc/gv0
> Brick6: giant6:/gluster/sdc/gv0
> Brick7: giant1:/gluster/sdd/gv0
> Brick8: giant2:/gluster/sdd/gv0
> Brick9: giant3:/gluster/sdd/gv0
> Brick10: giant4:/gluster/sdd/gv0
> Brick11: giant5:/gluster/sdd/gv0
> Brick12: giant6:/gluster/sdd/gv0
> Options Reconfigured:
> auth.allow: X.X.X.*,127.0.0.1
> nfs.disable: on
>
> Volume Name: gv2
> Type: Replicate
> Volume ID: 30c78928-5f2c-4671-becc-8deaee1a7a8d
> Status: Started
> Snapshot Count: 0
> Number of Bricks: 1 x 2 = 2
> Transport-type: tcp
> Bricks:
> Brick1: giant1:/gluster/sdd/gv2
> Brick2: giant2:/gluster/sdd/gv2
> Options Reconfigured:
> auth.allow: X.X.X.*,127.0.0.1
> cluster.granular-entry-heal: on
> cluster.locking-scheme: granular
> nfs.disable: on
>
>
> 2016-11-30 0:10 GMT+01:00 Micha Ober <micha2k at gmail.com
> <mailto:micha2k at gmail.com>>:
>
> There also seems to be a bug report with a smiliar problem: (but
> no progress)
> https://bugzilla.redhat.com/show_bug.cgi?id=1370683
> <https://bugzilla.redhat.com/show_bug.cgi?id=1370683>
>
> For me, ALL servers are affected (not isolated to one or two servers)
>
> I also see messages like "INFO: task gpu_graphene_bv:4476 blocked
> for more than 120 seconds." in the syslog.
>
> For completeness (gv0 is the scratch volume, gv2 the slurm volume):
>
> [root at giant2: ~]# gluster v info
>
> Volume Name: gv0
> Type: Distributed-Replicate
> Volume ID: 993ec7c9-e4bc-44d0-b7c4-2d977e622e86
> Status: Started
> Snapshot Count: 0
> Number of Bricks: 6 x 2 = 12
> Transport-type: tcp
> Bricks:
> Brick1: giant1:/gluster/sdc/gv0
> Brick2: giant2:/gluster/sdc/gv0
> Brick3: giant3:/gluster/sdc/gv0
> Brick4: giant4:/gluster/sdc/gv0
> Brick5: giant5:/gluster/sdc/gv0
> Brick6: giant6:/gluster/sdc/gv0
> Brick7: giant1:/gluster/sdd/gv0
> Brick8: giant2:/gluster/sdd/gv0
> Brick9: giant3:/gluster/sdd/gv0
> Brick10: giant4:/gluster/sdd/gv0
> Brick11: giant5:/gluster/sdd/gv0
> Brick12: giant6:/gluster/sdd/gv0
> Options Reconfigured:
> auth.allow: X.X.X.*,127.0.0.1
> nfs.disable: on
>
> Volume Name: gv2
> Type: Replicate
> Volume ID: 30c78928-5f2c-4671-becc-8deaee1a7a8d
> Status: Started
> Snapshot Count: 0
> Number of Bricks: 1 x 2 = 2
> Transport-type: tcp
> Bricks:
> Brick1: giant1:/gluster/sdd/gv2
> Brick2: giant2:/gluster/sdd/gv2
> Options Reconfigured:
> auth.allow: X.X.X.*,127.0.0.1
> cluster.granular-entry-heal: on
> cluster.locking-scheme: granular
> nfs.disable: on
>
>
> 2016-11-29 19:21 GMT+01:00 Micha Ober <micha2k at gmail.com
> <mailto:micha2k at gmail.com>>:
>
> I had opened another thread on this mailing list (Subject:
> "After upgrade from 3.4.2 to 3.8.5 - High CPU usage resulting
> in disconnects and split-brain").
>
> The title may be a bit misleading now, as I am no longer
> observing high CPU usage after upgrading to 3.8.6, but the
> disconnects are still happening and the number of files in
> split-brain is growing.
>
> Setup: 6 compute nodes, each serving as a glusterfs server and
> client, Ubuntu 14.04, two bricks per node, distribute-replicate
>
> I have two gluster volumes set up (one for scratch data, one
> for the slurm scheduler). Only the scratch data volume shows
> critical errors "[...] has not responded in the last 42
> seconds, disconnecting.". So I can rule out network problems,
> the gigabit link between the nodes is not saturated at all.
> The disks are almost idle (<10%).
>
> I have glusterfs 3.4.2 on Ubuntu 12.04 on a another compute
> cluster, running fine since it was deployed.
> I had glusterfs 3.4.2 on Ubuntu 14.04 on this cluster, running
> fine for almost a year.
>
> After upgrading to 3.8.5, the problems (as described) started.
> I would like to use some of the new features of the newer
> versions (like bitrot), but the users can't run their compute
> jobs right now because the result files are garbled.
>
> 2016-11-29 18:53 GMT+01:00 Atin Mukherjee <amukherj at redhat.com
> <mailto:amukherj at redhat.com>>:
>
> Would you be able to share what is not working for you in
> 3.8.x (mention the exact version). 3.4 is quite old and
> falling back to an unsupported version doesn't look a
> feasible option.
>
> On Tue, 29 Nov 2016 at 17:01, Micha Ober
> <micha2k at gmail.com <mailto:micha2k at gmail.com>> wrote:
>
> Hi,
>
> I was using gluster 3.4 and upgraded to 3.8, but that
> version showed to be unusable for me. I now need to
> downgrade.
>
> I'm running Ubuntu 14.04. As upgrades of the op
> version are irreversible, I guess I have to delete all
> gluster volumes and re-create them with the downgraded
> version.
>
> 0. Backup data
> 1. Unmount all gluster volumes
> 2. apt-get purge glusterfs-server glusterfs-client
> 3. Remove PPA for 3.8
> 4. Add PPA for older version
> 5. apt-get install glusterfs-server glusterfs-client
> 6. Create volumes
>
> Is "purge" enough to delete all configuration files of
> the currently installed version or do I need to
> manually clear some residues before installing an
> older version?
>
> Thanks.
> _______________________________________________
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> <mailto:Gluster-users at gluster.org>
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>
> --
> - Atin (atinm)
>
>
>
>
>
>
> _______________________________________________
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> Gluster-users at gluster.org
> http://www.gluster.org/mailman/listinfo/gluster-users
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