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

Wed Nov 25 09:42:16 UTC 2020

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 

----- Original Message -----

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 

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