22 Oct
2020
22 Oct
'20
3:14 p.m.
I've not touched the journal segments, current value of
mds_log_max_segments is 128. Would you recommend I increase (or
decrease) that value? And do you think I should change
mds_log_max_expiring to match that value?
On Thu, Oct 22, 2020 at 3:06 PM Dan van der Ster <dan(a)vanderster.com> wrote:
>
> You could decrease the mds_cache_memory_limit but I don't think this
> will help here during replay.
>
> You can see a related tracker here: https://tracker.ceph.com/issues/47582
> This is possibly caused by replaying a very large journal. Did you
> increase the journal segments?
>
> -- dan
>
>
>
>
>
>
>
> -- dan
>
> On Thu, Oct 22, 2020 at 3:35 PM David C <dcsysengineer(a)gmail.com> wrote:
> >
> > Dan, many thanks for the response.
> >
> > I was going down the route of looking at mds_beacon_grace but I now
> > realise when I start my MDS, it's swallowing up memory rapidly and
> > looks like the oom-killer is eventually killing the mds. With debug
> > upped to 10, I can see it's doing EMetaBlob.replays on various dirs in
> > the filesystem and I can't see any obvious issues.
> >
> > This server has 128GB ram with 111GB free with the MDS stopped
> >
> > The mds_cache_memory_limit is currently set to 32GB
> >
> > Could this be a case of simply reducing the mds cache until I can get
> > this started again or is there another setting I should be looking at?
> > Is it safe to reduce the cache memory limit at this point?
> >
> > The standby is currently down and has been deliberately down for a while now.
> >
> > Log excerpt from debug 10 just before MDS is killed (path/to/dir
> > refers to a real path in my FS)
> >
> > 2020-10-22 13:29:49.527372 7fc72d39f700 10
> > mds.0.cache.ino(0x1000e4c0ff4) mark_dirty_parent
> > 2020-10-22 13:29:49.527374 7fc72d39f700 10 mds.0.journal
> > EMetaBlob.replay noting opened inode [inode 0x1000e4c0ff4 [2,head]
> > /path/to/dir/{dc97bb9c-4600-48bb-b232-23f9e45caa6e}.tmp auth v904149
> > dirtyparent s
> > =0 n(v0 1=1+0) (iversion lock) | dirtyparent=1 dirty=1 0x561c23d66e00]
> > 2020-10-22 13:29:49.527378 7fc72d39f700 10 mds.0.journal
> > EMetaBlob.replay inotable tablev 481253 <= table 481328
> > 2020-10-22 13:29:49.527380 7fc72d39f700 10 mds.0.journal
> > EMetaBlob.replay sessionmap v 240341131 <= table 240378576
> > 2020-10-22 13:29:49.527383 7fc72d39f700 10 mds.0.journal
> > EMetaBlob.replay request client.16250824:1416595263 trim_to 1416595263
> > 2020-10-22 13:29:49.530097 7fc72d39f700 10 mds.0.log _replay
> > 57437755528637~11764673 / 57441334490146 2020-10-22 09:08:56.198798:
> > EOpen [metab
> > lob 0x10009e1ec8e, 1881 dirs], 16748 open files
> > 2020-10-22 13:29:49.530106 7fc72d39f700 10 mds.0.journal EOpen.replay
> > 2020-10-22 13:29:49.530107 7fc72d39f700 10 mds.0.journal
> > EMetaBlob.replay 1881 dirlumps by unknown.0
> > 2020-10-22 13:29:49.530109 7fc72d39f700 10 mds.0.journal
> > EMetaBlob.replay dir 0x10009e1ec8e
> > 2020-10-22 13:29:49.530111 7fc72d39f700 10 mds.0.journal
> > EMetaBlob.replay updated dir [dir 0x10009e1ec8e /path/to/dir/ [2,head]
> > auth v=904150 cv=0/0 state=1073741824 f(v0 m2020-10-22 08:46:44.932805
> > 89215=89215+0) n(v2 rc2020-10-22 08:46:44.932805 b133337592
> > 89215=89215+0) hs=42927+1178,ss=0+0 dirty=2376 | child=1
> > 0x56043c4bd100]
> > 2020-10-22 13:29:50.275864 7fc731ba8700 5
> > mds.beacon.hostnamecephssd01 Sending beacon up:replay seq 13
> > 2020-10-22 13:29:51.026368 7fc73732e700 5
> > mds.beacon.hostnamecephssd01 received beacon reply up:replay seq 13
> > rtt 0.750024
> > 2020-10-22 13:29:51.026377 7fc73732e700 0
> > mds.beacon.hostnamecephssd01 MDS is no longer laggy
> > 2020-10-22 13:29:54.275993 7fc731ba8700 5
> > mds.beacon.hostnamecephssd01 Sending beacon up:replay seq 14
> > 2020-10-22 13:29:54.277360 7fc73732e700 5
> > mds.beacon.hostnamecephssd01 received beacon reply up:replay seq 14
> > rtt 0.00100003
> > 2020-10-22 13:29:58.276117 7fc731ba8700 5
> > mds.beacon.hostnamecephssd01 Sending beacon up:replay seq 15
> > 2020-10-22 13:29:58.277322 7fc73732e700 5
> > mds.beacon.hostnamecephssd01 received beacon reply up:replay seq 15
> > rtt 0.00100003
> > 2020-10-22 13:30:02.276313 7fc731ba8700 5
> > mds.beacon.hostnamecephssd01 Sending beacon up:replay seq 16
> > 2020-10-22 13:30:02.477973 7fc73732e700 5
> > mds.beacon.hostnamecephssd01 received beacon reply up:replay seq 16
> > rtt 0.202007
> >
> > Thanks,
> > David
> >
> > On Thu, Oct 22, 2020 at 1:41 PM Dan van der Ster <dan(a)vanderster.com>
wrote:
> > >
> > > You can disable that beacon by increasing mds_beacon_grace to 300 or
> > > 600. This will stop the mon from failing that mds over to a standby.
> > > I don't know if that is set on the mon or mgr, so I usually set it on
both.
> > > (You might as well disable the standby too -- no sense in something
> > > failing back and forth between two mdses).
> > >
> > > Next -- looks like your mds is in active:replay. Is it doing anything?
> > > Is it using lots of CPU/RAM? If you increase debug_mds do you see some
> > > progress?
> > >
> > > -- dan
> > >
> > >
> > > On Thu, Oct 22, 2020 at 2:01 PM David C <dcsysengineer(a)gmail.com>
wrote:
> > > >
> > > > Hi All
> > > >
> > > > My main CephFS data pool on a Luminous 12.2.10 cluster hit capacity
> > > > overnight, metadata is on a separate pool which didn't hit
capacity but the
> > > > filesystem stopped working which I'd expect. I increased the osd
full-ratio
> > > > to give me some breathing room to get some data deleted once the
filesystem
> > > > is back online. When I attempt to restart the MDS service, I see the
usual
> > > > stuff I'd expect in the log but then:
> > > >
> > > > heartbeat_map is_healthy 'MDSRank' had timed out after 15
> > > >
> > > >
> > > > Followed by:
> > > >
> > > > mds.beacon.hostnamecephssd01 Skipping beacon heartbeat to monitors
(last
> > > > > acked 4.00013s ago); MDS internal heartbeat is not healthy!
> > > >
> > > >
> > > > Eventually I get:
> > > >
> > > > >
> > > > > mds.beacon.hostnamecephssd01 is_laggy 29.372 > 15 since last
acked beacon
> > > > > mds.0.90884 skipping upkeep work because connection to Monitors
appears
> > > > > laggy
> > > > > mds.hostnamecephssd01 Updating MDS map to version 90885 from
mon.0
> > > > > mds.beacon.hostnamecephssd01 MDS is no longer laggy
> > > >
> > > >
> > > > The "MDS is no longer laggy" appears to be where the service
fails
> > > >
> > > > Meanwhile a ceph -s is showing:
> > > >
> > > > >
> > > > > cluster:
> > > > > id: 5c5998fd-dc9b-47ec-825e-beaba66aad11
> > > > > health: HEALTH_ERR
> > > > > 1 filesystem is degraded
> > > > > insufficient standby MDS daemons available
> > > > > 67 backfillfull osd(s)
> > > > > 11 nearfull osd(s)
> > > > > full ratio(s) out of order
> > > > > 2 pool(s) backfillfull
> > > > > 2 pool(s) nearfull
> > > > > 6 scrub errors
> > > > > Possible data damage: 5 pgs inconsistent
> > > > > services:
> > > > > mon: 3 daemons, quorum
hostnameceph01,hostnameceph02,hostnameceph03
> > > > > mgr: hostnameceph03(active), standbys: hostnameceph02,
hostnameceph01
> > > > > mds: cephfs-1/1/1 up {0=hostnamecephssd01=up:replay}
> > > > > osd: 172 osds: 161 up, 161 in
> > > > > data:
> > > > > pools: 5 pools, 8384 pgs
> > > > > objects: 76.25M objects, 124TiB
> > > > > usage: 373TiB used, 125TiB / 498TiB avail
> > > > > pgs: 8379 active+clean
> > > > > 5 active+clean+inconsistent
> > > > > io:
> > > > > client: 676KiB/s rd, 0op/s rd, 0op/s w
> > > >
> > > >
> > > > The 5 pgs inconsistent is not a new issue, that is from past scrubs,
just
> > > > haven't gotten around to manually clearing them although I suppose
they
> > > > could be related to my issue
> > > >
> > > > The cluster has no clients connected
> > > >
> > > > I did notice in the ceph.log, some OSDs that are in the same host as
the
> > > > MDS service briefly went down when trying to restart the MDS but
examining
> > > > the logs of those particular OSDs isn't showing any glaring
issues.
> > > >
> > > > Full MDS log at debug 5 (can go higher if needed):
> > > >
> > > > 2020-10-22 11:27:10.987652 7f6f696f5240 0 set uid:gid to 167:167
> > > > (ceph:ceph)
> > > > 2020-10-22 11:27:10.987669 7f6f696f5240 0 ceph version 12.2.10
> > > > (177915764b752804194937482a39e95e0ca3de94) luminous (stable), process
> > > > ceph-mds, pid 2022582
> > > > 2020-10-22 11:27:10.990567 7f6f696f5240 0 pidfile_write: ignore
empty
> > > > --pid-file
> > > > 2020-10-22 11:27:11.027981 7f6f62616700 1 mds.hostnamecephssd01
Updating
> > > > MDS map to version 90882 from mon.0
> > > > 2020-10-22 11:27:15.097957 7f6f62616700 1 mds.hostnamecephssd01
Updating
> > > > MDS map to version 90883 from mon.0
> > > > 2020-10-22 11:27:15.097989 7f6f62616700 1 mds.hostnamecephssd01 Map
has
> > > > assigned me to become a standby
> > > > 2020-10-22 11:27:15.101071 7f6f62616700 1 mds.hostnamecephssd01
Updating
> > > > MDS map to version 90884 from mon.0
> > > > 2020-10-22 11:27:15.105310 7f6f62616700 1 mds.0.90884 handle_mds_map
i am
> > > > now mds.0.90884
> > > > 2020-10-22 11:27:15.105316 7f6f62616700 1 mds.0.90884 handle_mds_map
state
> > > > change up:boot --> up:replay
> > > > 2020-10-22 11:27:15.105325 7f6f62616700 1 mds.0.90884 replay_start
> > > > 2020-10-22 11:27:15.105333 7f6f62616700 1 mds.0.90884 recovery set
is
> > > > 2020-10-22 11:27:15.105344 7f6f62616700 1 mds.0.90884 waiting for
osdmap
> > > > 73745 (which blacklists prior instance)
> > > > 2020-10-22 11:27:15.149092 7f6f5be09700 0 mds.0.cache creating
system
> > > > inode with ino:0x100
> > > > 2020-10-22 11:27:15.149693 7f6f5be09700 0 mds.0.cache creating
system
> > > > inode with ino:0x1
> > > > 2020-10-22 11:27:41.021708 7f6f63618700 1 heartbeat_map is_healthy
> > > > 'MDSRank' had timed out after 15
> > > > 2020-10-22 11:27:43.029290 7f6f5f610700 1 heartbeat_map is_healthy
> > > > 'MDSRank' had timed out after 15
> > > > 2020-10-22 11:27:43.029297 7f6f5f610700 0
mds.beacon.hostnamecephssd01
> > > > Skipping beacon heartbeat to monitors (last acked 4.00013s ago); MDS
> > > > internal heartbeat is not healthy!
> > > > 2020-10-22 11:27:45.866711 7f6f5fe11700 1 heartbeat_map
reset_timeout
> > > > 'MDSRank' had timed out after 15
> > > > 2020-10-22 11:28:01.021965 7f6f63618700 1 heartbeat_map is_healthy
> > > > 'MDSRank' had timed out after 15
> > > > 2020-10-22 11:28:03.029862 7f6f5f610700 1 heartbeat_map is_healthy
> > > > 'MDSRank' had timed out after 15
> > > > 2020-10-22 11:28:03.029885 7f6f5f610700 0
mds.beacon.hostnamecephssd01
> > > > Skipping beacon heartbeat to monitors (last acked 4.00113s ago); MDS
> > > > internal heartbeat is not healthy!
> > > > 2020-10-22 11:28:06.022033 7f6f63618700 1 heartbeat_map is_healthy
> > > > 'MDSRank' had timed out after 15
> > > > 2020-10-22 11:28:07.029955 7f6f5f610700 1 heartbeat_map is_healthy
> > > > 'MDSRank' had timed out after 15
> > > > 2020-10-22 11:28:07.029961 7f6f5f610700 0
mds.beacon.hostnamecephssd01
> > > > Skipping beacon heartbeat to monitors (last acked 8.00126s ago); MDS
> > > > internal heartbeat is not healthy!
> > > > 2020-10-22 11:28:11.022099 7f6f63618700 1 heartbeat_map is_healthy
> > > > 'MDSRank' had timed out after 15
> > > > 2020-10-22 11:28:11.030024 7f6f5f610700 1 heartbeat_map is_healthy
> > > > 'MDSRank' had timed out after 15
> > > > 2020-10-22 11:28:11.030028 7f6f5f610700 0
mds.beacon.hostnamecephssd01
> > > > Skipping beacon heartbeat to monitors (last acked 12.0014s ago); MDS
> > > > internal heartbeat is not healthy!
> > > > 2020-10-22 11:28:15.030092 7f6f5f610700 1 heartbeat_map is_healthy
> > > > 'MDSRank' had timed out after 15
> > > > 2020-10-22 11:28:15.030099 7f6f5f610700 0
mds.beacon.hostnamecephssd01
> > > > Skipping beacon heartbeat to monitors (last acked 16.0015s ago); MDS
> > > > internal heartbeat is not healthy!
> > > > 2020-10-22 11:28:16.022165 7f6f63618700 1 heartbeat_map is_healthy
> > > > 'MDSRank' had timed out after 15
> > > > 2020-10-22 11:28:19.030163 7f6f5f610700 1 heartbeat_map is_healthy
> > > > 'MDSRank' had timed out after 15
> > > > 2020-10-22 11:28:19.030169 7f6f5f610700 0
mds.beacon.hostnamecephssd01
> > > > Skipping beacon heartbeat to monitors (last acked 20.0016s ago); MDS
> > > > internal heartbeat is not healthy!
> > > > 2020-10-22 11:28:21.022231 7f6f63618700 1 heartbeat_map is_healthy
> > > > 'MDSRank' had timed out after 15
> > > > 2020-10-22 11:28:23.030233 7f6f5f610700 1 heartbeat_map is_healthy
> > > > 'MDSRank' had timed out after 15
> > > > 2020-10-22 11:28:23.030241 7f6f5f610700 0
mds.beacon.hostnamecephssd01
> > > > Skipping beacon heartbeat to monitors (last acked 24.0008s ago); MDS
> > > > internal heartbeat is not healthy!
> > > > 2020-10-22 11:28:26.022295 7f6f63618700 1 heartbeat_map is_healthy
> > > > 'MDSRank' had timed out after 15
> > > > 2020-10-22 11:28:27.030305 7f6f5f610700 1 heartbeat_map is_healthy
> > > > 'MDSRank' had timed out after 15
> > > > 2020-10-22 11:28:27.030311 7f6f5f610700 0
mds.beacon.hostnamecephssd01
> > > > Skipping beacon heartbeat to monitors (last acked 28.0009s ago); MDS
> > > > internal heartbeat is not healthy!
> > > > 2020-10-22 11:28:28.401161 7f6f5fe11700 1 heartbeat_map
reset_timeout
> > > > 'MDSRank' had timed out after 15
> > > > 2020-10-22 11:28:28.401168 7f6f5fe11700 1
mds.beacon.hostnamecephssd01
> > > > is_laggy 29.372 > 15 since last acked beacon
> > > > 2020-10-22 11:28:28.401177 7f6f5fe11700 1 mds.0.90884 skipping upkeep
work
> > > > because connection to Monitors appears laggy
> > > > 2020-10-22 11:28:28.401187 7f6f62616700 1 mds.hostnamecephssd01
Updating
> > > > MDS map to version 90885 from mon.0
> > > > 2020-10-22 11:28:31.659817 7f6f64595700 0
mds.beacon.hostnamecephssd01
> > > > MDS is no longer laggy
> > > > 2020-10-22 11:36:15.880009 7f88ee4ac240 0 set uid:gid to 167:167
> > > > (ceph:ceph)
> > > > 2020-10-22 11:36:15.880026 7f88ee4ac240 0 ceph version 12.2.10
> > > > (177915764b752804194937482a39e95e0ca3de94) luminous (stable), process
> > > > ceph-mds, pid 2022663
> > > > 2020-10-22 11:36:15.883118 7f88ee4ac240 0 pidfile_write: ignore
empty
> > > > --pid-file
> > > > 2020-10-22 11:36:15.921200 7f88e73cd700 1 mds.hostnamecephssd01
Updating
> > > > MDS map to version 90887 from mon.2
> > > > 2020-10-22 11:36:20.270298 7f88e73cd700 1 mds.hostnamecephssd01
Updating
> > > > MDS map to version 90888 from mon.2
> > > > 2020-10-22 11:36:20.270329 7f88e73cd700 1 mds.hostnamecephssd01 Map
has
> > > > assigned me to become a standby
> > > > 2020-10-22 11:36:20.272917 7f88e73cd700 1 mds.hostnamecephssd01
Updating
> > > > MDS map to version 90889 from mon.2
> > > > 2020-10-22 11:36:20.277063 7f88e73cd700 1 mds.0.90889 handle_mds_map
i am
> > > > now mds.0.90889
> > > > 2020-10-22 11:36:20.277069 7f88e73cd700 1 mds.0.90889 handle_mds_map
state
> > > > change up:boot --> up:replay
> > > > 2020-10-22 11:36:20.277079 7f88e73cd700 1 mds.0.90889 replay_start
> > > > 2020-10-22 11:36:20.277086 7f88e73cd700 1 mds.0.90889 recovery set
is
> > > > 2020-10-22 11:36:20.277096 7f88e73cd700 1 mds.0.90889 waiting for
osdmap
> > > > 73746 (which blacklists prior instance)
> > > > 2020-10-22 11:36:20.322318 7f88e0bc0700 0 mds.0.cache creating
system
> > > > inode with ino:0x100
> > > > 2020-10-22 11:36:20.322918 7f88e0bc0700 0 mds.0.cache creating
system
> > > > inode with ino:0x1
> > > > 2020-10-22 11:36:47.922531 7f88e43c7700 1 heartbeat_map is_healthy
> > > > 'MDSRank' had timed out after 15
> > > > 2020-10-22 11:36:47.922549 7f88e43c7700 0
mds.beacon.hostnamecephssd01
> > > > Skipping beacon heartbeat to monitors (last acked 4.00013s ago); MDS
> > > > internal heartbeat is not healthy!
> > > > 2020-10-22 11:36:50.914516 7f88e83cf700 1 heartbeat_map is_healthy
> > > > 'MDSRank' had timed out after 15
> > > > 2020-10-22 11:36:51.351457 7f88e4bc8700 1 heartbeat_map
reset_timeout
> > > > 'MDSRank' had timed out after 15
> > > > 2020-10-22 11:37:07.923089 7f88e43c7700 1 heartbeat_map is_healthy
> > > > 'MDSRank' had timed out after 15
> > > > 2020-10-22 11:37:07.923126 7f88e43c7700 0
mds.beacon.hostnamecephssd01
> > > > Skipping beacon heartbeat to monitors (last acked 3.99913s ago); MDS
> > > > internal heartbeat is not healthy!
> > > > 2020-10-22 11:37:10.914767 7f88e83cf700 1 heartbeat_map is_healthy
> > > > 'MDSRank' had timed out after 15
> > > > 2020-10-22 11:37:11.923216 7f88e43c7700 1 heartbeat_map is_healthy
> > > > 'MDSRank' had timed out after 15
> > > > 2020-10-22 11:37:11.923223 7f88e43c7700 0
mds.beacon.hostnamecephssd01
> > > > Skipping beacon heartbeat to monitors (last acked 7.99926s ago); MDS
> > > > internal heartbeat is not healthy!
> > > > 2020-10-22 11:37:15.914831 7f88e83cf700 1 heartbeat_map is_healthy
> > > > 'MDSRank' had timed out after 15
> > > > 2020-10-22 11:37:15.923286 7f88e43c7700 1 heartbeat_map is_healthy
> > > > 'MDSRank' had timed out after 15
> > > > 2020-10-22 11:37:15.923294 7f88e43c7700 0
mds.beacon.hostnamecephssd01
> > > > Skipping beacon heartbeat to monitors (last acked 11.9994s ago); MDS
> > > > internal heartbeat is not healthy!
> > > > 2020-10-22 11:37:19.923359 7f88e43c7700 1 heartbeat_map is_healthy
> > > > 'MDSRank' had timed out after 15
> > > > 2020-10-22 11:37:19.923366 7f88e43c7700 0
mds.beacon.hostnamecephssd01
> > > > Skipping beacon heartbeat to monitors (last acked 15.9995s ago); MDS
> > > > internal heartbeat is not healthy!
> > > > 2020-10-22 11:37:20.914917 7f88e83cf700 1 heartbeat_map is_healthy
> > > > 'MDSRank' had timed out after 15
> > > > 2020-10-22 11:37:23.923430 7f88e43c7700 1 heartbeat_map is_healthy
> > > > 'MDSRank' had timed out after 15
> > > > 2020-10-22 11:37:23.923437 7f88e43c7700 0
mds.beacon.hostnamecephssd01
> > > > Skipping beacon heartbeat to monitors (last acked 19.9996s ago); MDS
> > > > internal heartbeat is not healthy!
> > > > 2020-10-22 11:37:25.914981 7f88e83cf700 1 heartbeat_map is_healthy
> > > > 'MDSRank' had timed out after 15
> > > > 2020-10-22 11:37:27.923501 7f88e43c7700 1 heartbeat_map is_healthy
> > > > 'MDSRank' had timed out after 15
> > > > 2020-10-22 11:37:27.923508 7f88e43c7700 0
mds.beacon.hostnamecephssd01
> > > > Skipping beacon heartbeat to monitors (last acked 23.9998s ago); MDS
> > > > internal heartbeat is not healthy!
> > > > 2020-10-22 11:37:30.915046 7f88e83cf700 1 heartbeat_map is_healthy
> > > > 'MDSRank' had timed out after 15
> > > > 2020-10-22 11:37:31.923572 7f88e43c7700 1 heartbeat_map is_healthy
> > > > 'MDSRank' had timed out after 15
> > > > 2020-10-22 11:37:31.923579 7f88e43c7700 0
mds.beacon.hostnamecephssd01
> > > > Skipping beacon heartbeat to monitors (last acked 27.9999s ago); MDS
> > > > internal heartbeat is not healthy!
> > > > 2020-10-22 11:37:32.412628 7f88e4bc8700 1 heartbeat_map
reset_timeout
> > > > 'MDSRank' had timed out after 15
> > > > 2020-10-22 11:37:32.412635 7f88e4bc8700 1
mds.beacon.hostnamecephssd01
> > > > is_laggy 28.4889 > 15 since last acked beacon
> > > > 2020-10-22 11:37:32.412643 7f88e4bc8700 1 mds.0.90889 skipping upkeep
work
> > > > because connection to Monitors appears laggy
> > > > 2020-10-22 11:37:32.412657 7f88e73cd700 1 mds.hostnamecephssd01
Updating
> > > > MDS map to version 90890 from mon.2
> > > > 2020-10-22 11:37:35.978858 7f88e934c700 0
mds.beacon.hostnamecephssd01
> > > > MDS is no longer laggy
> > > >
> > > >
> > > > Thanks in advance for any assistance you can provide!
> > > > David
> > > > _______________________________________________
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