[Gluster-users] RE : Frequent connect and disconnect messages flooded in logs
Mohammed Rafi K C
rkavunga at redhat.com
Tue Dec 6 07:15:23 UTC 2016
On 12/03/2016 12:56 AM, Micha Ober wrote:
> ** Update: ** I have downgraded from 3.8.6 to 3.7.17 now, but the
> problem still exists.
>
> Client log: http://paste.ubuntu.com/23569065/
> Brick log: http://paste.ubuntu.com/23569067/
>
> Please note that each server has two bricks.
> Whereas, according to the logs, one brick loses the connection to all
> other hosts:
> [2016-12-02 18:38:53.703301] W [socket.c:596:__socket_rwv] 0-tcp.gv0-server: writev on X.X.X.219:49121 failed (Broken pipe)
> [2016-12-02 18:38:53.703381] W [socket.c:596:__socket_rwv] 0-tcp.gv0-server: writev on X.X.X.62:49118 failed (Broken pipe)
> [2016-12-02 18:38:53.703380] W [socket.c:596:__socket_rwv] 0-tcp.gv0-server: writev on X.X.X.107:49121 failed (Broken pipe)
> [2016-12-02 18:38:53.703424] W [socket.c:596:__socket_rwv] 0-tcp.gv0-server: writev on X.X.X.206:49120 failed (Broken pipe)
> [2016-12-02 18:38:53.703359] W [socket.c:596:__socket_rwv] 0-tcp.gv0-server: writev on X.X.X.58:49121 failed (Broken pipe)
>
> The SECOND brick on the SAME host is NOT affected, i.e. no disconnects!
> As I said, the network connection is fine and the disks are idle.
> The CPU always has 2 free cores.
>
> It looks like I have to downgrade to 3.4 now in order for the disconnects to stop.
Hi Micha,
Thanks for the update and sorry for what happened with gluster higher
versions. I can understand the need for downgrade as it is a production
setup.
Can you tell me the clients used here ? whether it is a
fuse,nfs,nfs-ganesha, smb or libgfapi ?
Since I'm not able to reproduce the issue (I have been trying from last
3days) and the logs are not much helpful here (we don't have much logs
in socket layer), Could you please create a dummy cluster and try to
reproduce the issue? If then we can play with that volume and I could
provide some debug build which we can use for further debugging?
If you don't have bandwidth for this, please leave it ;).
Regards
Rafi KC
>
> - Micha
>
> Am 30.11.2016 um 06:57 schrieb Mohammed Rafi K C:
>>
>> 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>:
>>>
>>> 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>:
>>>
>>> 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> 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.
>>> _______________________________________________
>>> Gluster-users mailing list
>>> Gluster-users at gluster.org
>>> <mailto:Gluster-users at gluster.org>
>>> http://www.gluster.org/mailman/listinfo/gluster-users
>>> <http://www.gluster.org/mailman/listinfo/gluster-users>
>>>
>>> --
>>> - Atin (atinm)
>>>
>>>
>>>
>>>
>>>
>>>
>>> _______________________________________________
>>> Gluster-users mailing list
>>> Gluster-users at gluster.org
>>> http://www.gluster.org/mailman/listinfo/gluster-users
>>
>
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