[Gluster-users] possible memory leak in client/fuse mount

Olaf Buitelaar olaf.buitelaar at gmail.com
Fri Nov 27 12:34:34 UTC 2020


Hi Ravi,

I'm not sure what was bothering the SHD, but i tried again to restart the
glusterd/glusterfsd's and now the SHD came up. I'm sorry i don't have any
more details about what could have caused the issue.
If you want me to check/search for certain log messages on what could have
caused it, please let me know.

Thanks for your assistance.

Best Olaf

Op do 26 nov. 2020 om 11:53 schreef Ravishankar N <ravishankar at redhat.com>:

>
> On 26/11/20 4:00 pm, Olaf Buitelaar wrote:
>
> Hi Ravi,
>
> I could try that, but i can only try a setup on VM's, and will not be able
> to setup an environment like our production environment.
> Which runs on physical machines, and has actual production load etc. So
> the 2 setups would be quite different.
> Personally i think it would be best debug the actual machines instead of
> trying to reproduce it. Since the reproduction of the issue on the
> physical machines is just swap the repositories and upgrade the packages.
> Let me know what you think?
>
> Physical machines or VMs - anything is fine. The only thing is I cannot
> guarantee quick responses , so if it is a production machine, it will be an
> issue for you. So any set up you can use for experimenting is fine. You
> don't need any clients for the testing. Just create a 1x2  replica volume
> using 2 nodes and start it. Then upgrade one node and see if shd and bricks
> come up on that node.
>
> -Ravi
>
>
> Thanks Olaf
>
> Op do 26 nov. 2020 om 02:43 schreef Ravishankar N <ravishankar at redhat.com
> >:
>
>>
>> On 25/11/20 7:17 pm, Olaf Buitelaar wrote:
>>
>> Hi Ravi,
>>
>> Thanks for checking. Unfortunately this is our production system, what
>> i've done is simple change the yum repo from gluter-6 to
>> http://mirror.centos.org/centos/$releasever/storage/$basearch/gluster-7/.
>> Did a yum upgrade. And did restart the glusterd process several times, i've
>> also tried rebooting the machine. And didn't touch the op-version yet,
>> which is still at (60000), usually i only do this when all nodes are
>> upgraded, and are running stable.
>> We're running multiple volumes with different configurations, but for
>> none of the volumes the shd starts on the upgraded nodes.
>> Is there anything further i could check/do to get to the bottom of this?
>>
>> Hi Olaf, like I said, would it be possible to create a test setup to see
>> if you can recreate it?
>> Regards,
>> Ravi
>>
>>
>> Thanks Olaf
>>
>> Op wo 25 nov. 2020 om 14:14 schreef Ravishankar N <ravishankar at redhat.com
>> >:
>>
>>>
>>> On 25/11/20 5:50 pm, Olaf Buitelaar wrote:
>>>
>>> Hi Ashish,
>>>
>>> Thank you for looking into this. I indeed also suspect it has something
>>> todo with the 7.X client, because on the 6.X clients the issue doesn't
>>> really seem to occur.
>>> I would love to update everything to 7.X, But since the self-heal
>>> daemons (
>>> https://lists.gluster.org/pipermail/gluster-users/2020-November/038917.html)
>>> won't start, i halted the full upgrade.
>>>
>>> Olaf, based on your email. I did try to upgrade a 1 node of a 3-node
>>> replica 3 setup from 6.10 to 7.8 on my test VMs and I found that the
>>> self-heal daemon (and the bricks) came online after I restarted glusterd
>>> post-upgrade on that node. (I did not touch the op-version), and I did not
>>> spend time on it further.  So I don't think the problem is related to the
>>> shd mux changes I referred to. But if you have a test setup where you can
>>> reproduce this, please raise a github issue with the details.
>>> Thanks,
>>> Ravi
>>>
>>> Hopefully that issue will be addressed in the upcoming release. Once
>>> i've everything running on the same version i'll check if the issue still
>>> occurs and reach out, if that's the case.
>>>
>>> Thanks Olaf
>>>
>>> Op wo 25 nov. 2020 om 10:42 schreef Ashish Pandey <aspandey at redhat.com>:
>>>
>>>>
>>>> Hi,
>>>>
>>>> I checked the statedump and found some very high memory allocations.
>>>> grep -rwn "num_allocs" glusterdump.17317.dump.1605* | cut -d'=' -f2 |
>>>> sort
>>>>
>>>> 30003616
>>>> 30003616
>>>> 3305
>>>> 3305
>>>> 36960008
>>>> 36960008
>>>> 38029944
>>>> 38029944
>>>> 38450472
>>>> 38450472
>>>> 39566824
>>>> 39566824
>>>> 4
>>>> I did check the lines on statedump and it could be happening in
>>>> protocol/clinet. However, I did not find anything suspicious in my quick
>>>> code exploration.
>>>> I would suggest to upgrade all the nodes on latest version and the
>>>> start your work and see if there is any high usage of memory .
>>>> That way it will also be easier to debug this issue.
>>>>
>>>> ---
>>>> Ashish
>>>>
>>>> ------------------------------
>>>> *From: *"Olaf Buitelaar" <olaf.buitelaar at gmail.com>
>>>> *To: *"gluster-users" <gluster-users at gluster.org>
>>>> *Sent: *Thursday, November 19, 2020 10:28:57 PM
>>>> *Subject: *[Gluster-users] possible memory leak in client/fuse mount
>>>>
>>>> Dear Gluster Users,
>>>>
>>>> I've a glusterfs process which consumes about all memory of the machine
>>>> (~58GB);
>>>>
>>>> # ps -faxu|grep 17317
>>>> root     17317  3.1 88.9 59695516 58479708 ?   Ssl  Oct31 839:36
>>>> /usr/sbin/glusterfs --process-name fuse --volfile-server=10.201.0.1
>>>> --volfile-server=10.201.0.8:10.201.0.5:10.201.0.6:10.201.0.7:10.201.0.9
>>>> --volfile-id=/docker2 /mnt/docker2
>>>>
>>>> The gluster version on this machine is 7.8, but i'm currently running a
>>>> mixed cluster of 6.10 and 7.8, while awaiting to proceed to upgrade for the
>>>> issue mentioned earlier with the self-heal daemon.
>>>>
>>>> The affected volume info looks like;
>>>>
>>>> # gluster v info docker2
>>>>
>>>> Volume Name: docker2
>>>> Type: Distributed-Replicate
>>>> Volume ID: 4e0670a0-3d00-4360-98bd-3da844cedae5
>>>> Status: Started
>>>> Snapshot Count: 0
>>>> Number of Bricks: 3 x (2 + 1) = 9
>>>> Transport-type: tcp
>>>> Bricks:
>>>> Brick1: 10.201.0.5:/data0/gfs/bricks/brick1/docker2
>>>> Brick2: 10.201.0.9:/data0/gfs/bricks/brick1/docker2
>>>> Brick3: 10.201.0.3:/data0/gfs/bricks/bricka/docker2 (arbiter)
>>>> Brick4: 10.201.0.6:/data0/gfs/bricks/brick1/docker2
>>>> Brick5: 10.201.0.7:/data0/gfs/bricks/brick1/docker2
>>>> Brick6: 10.201.0.4:/data0/gfs/bricks/bricka/docker2 (arbiter)
>>>> Brick7: 10.201.0.1:/data0/gfs/bricks/brick1/docker2
>>>> Brick8: 10.201.0.8:/data0/gfs/bricks/brick1/docker2
>>>> Brick9: 10.201.0.2:/data0/gfs/bricks/bricka/docker2 (arbiter)
>>>> Options Reconfigured:
>>>> performance.cache-size: 128MB
>>>> transport.address-family: inet
>>>> nfs.disable: on
>>>> cluster.brick-multiplex: on
>>>>
>>>> The issue seems to be triggered by a program called zammad, which has
>>>> an init process, which runs in a loop. on cycle it re-compiles the
>>>> ruby-on-rails application.
>>>>
>>>> I've attached 2 statedumps, but as i only recently noticed the high
>>>> memory usage, i believe both statedumps already show an escalated state of
>>>> the glusterfs process. If it's needed to also have them from the beginning
>>>> let me know. The dumps are taken about an hour apart.
>>>> Also i've included the glusterd.log. I couldn't include mnt-docker2.log
>>>> since it's too large, since it's littered with: " I [MSGID: 109066]
>>>> [dht-rename.c:1951:dht_rename] 0-docker2-dht"
>>>> However i've inspected the log and it contains no Error message's all
>>>> are of the Info kind;
>>>> which look like these;
>>>> [2020-11-19 03:29:05.406766] I
>>>> [glusterfsd-mgmt.c:2282:mgmt_getspec_cbk] 0-glusterfs: No change in
>>>> volfile,continuing
>>>> [2020-11-19 03:29:21.271886] I [socket.c:865:__socket_shutdown]
>>>> 0-docker2-client-8: intentional socket shutdown(5)
>>>> [2020-11-19 03:29:24.479738] I [socket.c:865:__socket_shutdown]
>>>> 0-docker2-client-2: intentional socket shutdown(5)
>>>> [2020-11-19 03:30:12.318146] I [socket.c:865:__socket_shutdown]
>>>> 0-docker2-client-5: intentional socket shutdown(5)
>>>> [2020-11-19 03:31:27.381720] I [socket.c:865:__socket_shutdown]
>>>> 0-docker2-client-8: intentional socket shutdown(5)
>>>> [2020-11-19 03:31:30.579630] I [socket.c:865:__socket_shutdown]
>>>> 0-docker2-client-2: intentional socket shutdown(5)
>>>> [2020-11-19 03:32:18.427364] I [socket.c:865:__socket_shutdown]
>>>> 0-docker2-client-5: intentional socket shutdown(5)
>>>>
>>>> The rename messages look like these;
>>>> [2020-11-19 03:29:05.402663] I [MSGID: 109066]
>>>> [dht-rename.c:1951:dht_rename] 0-docker2-dht: renaming
>>>> /corporate/zammad/tmp/init/cache/bootsnap-compile-cache/95/75f93c20e375c5.tmp.eVcE5D
>>>> (fe083b7e-b0d5-485c-8666-e1f7cdac33e2)
>>>> (hash=docker2-replicate-2/cache=docker2-replicate-2) =>
>>>> /corporate/zammad/tmp/init/cache/bootsnap-compile-cache/95/75f93c20e375c5
>>>> ((null)) (hash=docker2-replicate-2/cache=<nul>)
>>>> [2020-11-19 03:29:05.410972] I [MSGID: 109066]
>>>> [dht-rename.c:1951:dht_rename] 0-docker2-dht: renaming
>>>> /corporate/zammad/tmp/init/cache/bootsnap-compile-cache/0d/86dd25f3d238ff.tmp.AdDTLu
>>>> (b1edadad-1d48-4bf4-be85-ffbe9d69d338)
>>>> (hash=docker2-replicate-1/cache=docker2-replicate-1) =>
>>>> /corporate/zammad/tmp/init/cache/bootsnap-compile-cache/0d/86dd25f3d238ff
>>>> ((null)) (hash=docker2-replicate-2/cache=<nul>)
>>>> [2020-11-19 03:29:05.420064] I [MSGID: 109066]
>>>> [dht-rename.c:1951:dht_rename] 0-docker2-dht: renaming
>>>> /corporate/zammad/tmp/init/cache/bootsnap-compile-cache/f2/6e44f76b508fd3.tmp.QKmxul
>>>> (31f80fcb-977c-433b-9259-5fdfcad1171c)
>>>> (hash=docker2-replicate-0/cache=docker2-replicate-0) =>
>>>> /corporate/zammad/tmp/init/cache/bootsnap-compile-cache/f2/6e44f76b508fd3
>>>> ((null)) (hash=docker2-replicate-0/cache=<nul>)
>>>> [2020-11-19 03:29:05.427537] I [MSGID: 109066]
>>>> [dht-rename.c:1951:dht_rename] 0-docker2-dht: renaming
>>>> /corporate/zammad/tmp/init/cache/bootsnap-compile-cache/b0/1d7303d9dfe009.tmp.qLUMec
>>>> (e2fdf971-731f-4765-80e8-3165433488ea)
>>>> (hash=docker2-replicate-2/cache=docker2-replicate-2) =>
>>>> /corporate/zammad/tmp/init/cache/bootsnap-compile-cache/b0/1d7303d9dfe009
>>>> ((null)) (hash=docker2-replicate-1/cache=<nul>)
>>>> [2020-11-19 03:29:05.440576] I [MSGID: 109066]
>>>> [dht-rename.c:1951:dht_rename] 0-docker2-dht: renaming
>>>> /corporate/zammad/tmp/init/cache/bootsnap-compile-cache/bd/952a089e164b36.tmp.4qvl22
>>>> (3e0bc6d1-13ac-47c6-b221-1256b4b506ef)
>>>> (hash=docker2-replicate-2/cache=docker2-replicate-2) =>
>>>> /corporate/zammad/tmp/init/cache/bootsnap-compile-cache/bd/952a089e164b36
>>>> ((null)) (hash=docker2-replicate-1/cache=<nul>)
>>>> [2020-11-19 03:29:05.452407] I [MSGID: 109066]
>>>> [dht-rename.c:1951:dht_rename] 0-docker2-dht: renaming
>>>> /corporate/zammad/tmp/init/cache/bootsnap-compile-cache/a3/b587dd08f35e2e.tmp.iIweTT
>>>> (9685b5f3-4b14-4050-9b00-1163856239b5)
>>>> (hash=docker2-replicate-1/cache=docker2-replicate-1) =>
>>>> /corporate/zammad/tmp/init/cache/bootsnap-compile-cache/a3/b587dd08f35e2e
>>>> ((null)) (hash=docker2-replicate-0/cache=<nul>)
>>>> [2020-11-19 03:29:05.460720] I [MSGID: 109066]
>>>> [dht-rename.c:1951:dht_rename] 0-docker2-dht: renaming
>>>> /corporate/zammad/tmp/init/cache/bootsnap-compile-cache/48/89cfb1b971c025.tmp.0W7jMK
>>>> (d0a8d0a4-c783-45db-bb4a-68e24044d830)
>>>> (hash=docker2-replicate-0/cache=docker2-replicate-0) =>
>>>> /corporate/zammad/tmp/init/cache/bootsnap-compile-cache/48/89cfb1b971c025
>>>> ((null)) (hash=docker2-replicate-1/cache=<nul>)
>>>> [2020-11-19 03:29:05.468800] I [MSGID: 109066]
>>>> [dht-rename.c:1951:dht_rename] 0-docker2-dht: renaming
>>>> /corporate/zammad/tmp/init/cache/bootsnap-compile-cache/d9/759d55e8da66eb.tmp.2yXtHB
>>>> (e5b61ef5-a3c2-4a2c-aa47-c377a6c090d7)
>>>> (hash=docker2-replicate-0/cache=docker2-replicate-0) =>
>>>> /corporate/zammad/tmp/init/cache/bootsnap-compile-cache/d9/759d55e8da66eb
>>>> ((null)) (hash=docker2-replicate-0/cache=<nul>)
>>>> [2020-11-19 03:29:05.476745] I [MSGID: 109066]
>>>> [dht-rename.c:1951:dht_rename] 0-docker2-dht: renaming
>>>> /corporate/zammad/tmp/init/cache/bootsnap-compile-cache/1c/f3a658342e36b7.tmp.gSkiEs
>>>> (17181a40-f9b2-438f-9dfc-7bb159c516e6)
>>>> (hash=docker2-replicate-2/cache=docker2-replicate-2) =>
>>>> /corporate/zammad/tmp/init/cache/bootsnap-compile-cache/1c/f3a658342e36b7
>>>> ((null)) (hash=docker2-replicate-0/cache=<nul>)
>>>> [2020-11-19 03:29:05.486729] I [MSGID: 109066]
>>>> [dht-rename.c:1951:dht_rename] 0-docker2-dht: renaming
>>>> /corporate/zammad/tmp/init/cache/bootsnap-compile-cache/f1/6bef7cb6446c7a.tmp.sVT0Dj
>>>> (cb6b1d52-b1c0-420c-86b7-2ceb8e8e73db)
>>>> (hash=docker2-replicate-0/cache=docker2-replicate-0) =>
>>>> /corporate/zammad/tmp/init/cache/bootsnap-compile-cache/f1/6bef7cb6446c7a
>>>> ((null)) (hash=docker2-replicate-1/cache=<nul>)
>>>> [2020-11-19 03:29:05.495115] I [MSGID: 109066]
>>>> [dht-rename.c:1951:dht_rename] 0-docker2-dht: renaming
>>>> /corporate/zammad/tmp/init/cache/bootsnap-compile-cache/45/73ba226559961b.tmp.QdPTFa
>>>> (d8450d9e-62a7-4fd5-9dd2-e072e318d9a0)
>>>> (hash=docker2-replicate-0/cache=docker2-replicate-0) =>
>>>> /corporate/zammad/tmp/init/cache/bootsnap-compile-cache/45/73ba226559961b
>>>> ((null)) (hash=docker2-replicate-1/cache=<nul>)
>>>> [2020-11-19 03:29:05.503424] I [MSGID: 109066]
>>>> [dht-rename.c:1951:dht_rename] 0-docker2-dht: renaming
>>>> /corporate/zammad/tmp/init/cache/bootsnap-compile-cache/13/29c0df35961ca0.tmp.s1xUJ1
>>>> (ffc57a77-8b91-4264-8e2d-a9966f0f37ef)
>>>> (hash=docker2-replicate-1/cache=docker2-replicate-1) =>
>>>> /corporate/zammad/tmp/init/cache/bootsnap-compile-cache/13/29c0df35961ca0
>>>> ((null)) (hash=docker2-replicate-2/cache=<nul>)
>>>> [2020-11-19 03:29:05.513532] I [MSGID: 109066]
>>>> [dht-rename.c:1951:dht_rename] 0-docker2-dht: renaming
>>>> /corporate/zammad/tmp/init/cache/bootsnap-compile-cache/be/8d6a07b6a0d6ad.tmp.A5DzQS
>>>> (5a595a65-372d-4377-b547-2c4e23f7be3a)
>>>> (hash=docker2-replicate-1/cache=docker2-replicate-1) =>
>>>> /corporate/zammad/tmp/init/cache/bootsnap-compile-cache/be/8d6a07b6a0d6ad
>>>> ((null)) (hash=docker2-replicate-0/cache=<nul>)
>>>> [2020-11-19 03:29:05.526885] I [MSGID: 109066]
>>>> [dht-rename.c:1951:dht_rename] 0-docker2-dht: renaming
>>>> /corporate/zammad/tmp/init/cache/bootsnap-compile-cache/ec/4208216d993cbe.tmp.IMXg0J
>>>> (2fa99fcd-64f8-4934-aeda-b356816f1132)
>>>> (hash=docker2-replicate-2/cache=docker2-replicate-2) =>
>>>> /corporate/zammad/tmp/init/cache/bootsnap-compile-cache/ec/4208216d993cbe
>>>> ((null)) (hash=docker2-replicate-2/cache=<nul>)
>>>> [2020-11-19 03:29:05.537637] I [MSGID: 109066]
>>>> [dht-rename.c:1951:dht_rename] 0-docker2-dht: renaming
>>>> /corporate/zammad/tmp/init/cache/bootsnap-compile-cache/57/1527c482cf2d6b.tmp.Y2L0cB
>>>> (db24d7bf-4a06-4356-a52e-1ab9537d1c3a)
>>>> (hash=docker2-replicate-0/cache=docker2-replicate-0) =>
>>>> /corporate/zammad/tmp/init/cache/bootsnap-compile-cache/57/1527c482cf2d6b
>>>> ((null)) (hash=docker2-replicate-1/cache=<nul>)
>>>> [2020-11-19 03:29:05.547878] I [MSGID: 109066]
>>>> [dht-rename.c:1951:dht_rename] 0-docker2-dht: renaming
>>>> /corporate/zammad/tmp/init/cache/bootsnap-compile-cache/88/1b60ead8d4c4e5.tmp.u47rss
>>>> (b12f041b-5bbd-4e3d-b700-8f673830393f)
>>>> (hash=docker2-replicate-1/cache=docker2-replicate-1) =>
>>>> /corporate/zammad/tmp/init/cache/bootsnap-compile-cache/88/1b60ead8d4c4e5
>>>> ((null)) (hash=docker2-replicate-1/cache=<nul>)
>>>>
>>>> if i can provide any more information please let me know.
>>>>
>>>> Thanks Olaf
>>>>
>>>>
>>>> ________
>>>>
>>>>
>>>>
>>>> Community Meeting Calendar:
>>>>
>>>> Schedule -
>>>> Every 2nd and 4th Tuesday at 14:30 IST / 09:00 UTC
>>>> Bridge: https://meet.google.com/cpu-eiue-hvk
>>>> Gluster-users mailing list
>>>> Gluster-users at gluster.org
>>>> https://lists.gluster.org/mailman/listinfo/gluster-users
>>>>
>>>>
>>> ________
>>>
>>>
>>>
>>> Community Meeting Calendar:
>>>
>>> Schedule -
>>> Every 2nd and 4th Tuesday at 14:30 IST / 09:00 UTC
>>> Bridge: https://meet.google.com/cpu-eiue-hvk
>>> Gluster-users mailing listGluster-users at gluster.orghttps://lists.gluster.org/mailman/listinfo/gluster-users
>>>
>>>
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