Yes, I am. 8 active + 2 standby, no subtree pinning. What if I restart the mds with trimming issues? Trying to figure out what happens with restarting. Venky Shankar <vshankar@redhat.com> 于2023年10月3日周二 12:39写道：
Hi Ben,
Are you using multimds without subtree pinning?
On Tue, Oct 3, 2023 at 10:00 AM Ben <ruidong.gao@gmail.com> wrote:
Dear cephers: more log captures(see below) show the full segments list(more than 30000
be trimmed stuck, growing over time). any ideas to get out of this?
Thanks, Ben
debug 2023-09-30T14:34:14.557+0000 7f9c29bb1700 5 mds.4.log trim already expiring segment 195341004/893374309813, 180 events debug 2023-09-30T14:34:14.557+0000 7f9c29bb1700 5 mds.4.log trim already expired segment 195341184/893386318445, 145 events debug 2023-09-30T14:34:14.557+0000 7f9c29bb1700 5 mds.4.log trim already expired segment 195341329/893386757388, 1024 events debug 2023-09-30T14:34:14.557+0000 7f9c29bb1700 5 mds.4.log trim already expiring segment 195342353/893388361174, 1024 events debug 2023-09-30T14:34:14.557+0000 7f9c29bb1700 5 mds.4.log trim already expiring segment 195343377/893389870480, 790 events debug 2023-09-30T14:34:14.557+0000 7f9c29bb1700 5 mds.4.log trim already expiring segment 195344167/893390955408, 1024 events debug 2023-09-30T14:34:14.557+0000 7f9c29bb1700 5 mds.4.log trim already expiring segment 195345191/893392321470, 1024 events debug 2023-09-30T14:34:14.557+0000 7f9c29bb1700 5 mds.4.log trim already expiring segment 195346215/893393752928, 1024 events debug 2023-09-30T14:34:14.557+0000 7f9c29bb1700 5 mds.4.log trim already expired segment 195347239/893395131457, 2 events debug 2023-09-30T14:34:14.557+0000 7f9c29bb1700 5 mds.4.log trim already expiring segment 195347241/893395212055, 1024 events debug 2023-09-30T14:34:14.557+0000 7f9c29bb1700 5 mds.4.log trim already expiring segment 195348265/893396582755, 1024 events debug 2023-09-30T14:34:14.557+0000 7f9c29bb1700 5 mds.4.log trim already expiring segment 195349289/893398132191, 860 events debug 2023-09-30T14:34:14.557+0000 7f9c29bb1700 5 mds.4.log trim already expiring segment 195350149/893399338619, 42 events debug 2023-09-30T14:34:14.557+0000 7f9c29bb1700 5 mds.4.log trim already expired segment 195350192/893408004655, 33 events debug 2023-09-30T14:34:14.557+0000 7f9c29bb1700 5 mds.4.log trim already expired segment 195350226/893412331017, 23 events debug 2023-09-30T14:34:14.557+0000 7f9c29bb1700 5 mds.4.log trim already expired segment 195350249/893416563419, 20 events debug 2023-09-30T14:34:14.557+0000 7f9c29bb1700 5 mds.4.log trim already expired segment 195350269/893420702085, 244 events debug 2023-09-30T14:34:14.557+0000 7f9c29bb1700 5 mds.4.log trim already expired segment 195350513/893424694857, 74 events debug 2023-09-30T14:34:14.557+0000 7f9c29bb1700 5 mds.4.log trim already expired segment 195350587/893428947395, 843 events debug 2023-09-30T14:34:14.557+0000 7f9c29bb1700 5 mds.4.log trim already expired segment 195351430/893432893900, 1019 events . . (all expired items abbreviated) . debug 2023-09-30T15:10:56.521+0000 7fc752167700 5 mds.3.log trim already expired segment 216605661/827226016068, 100 events debug 2023-09-30T15:10:56.521+0000 7fc752167700 5 mds.3.log trim already expired segment 216605761/827230263164, 153 events debug 2023-09-30T15:10:56.521+0000 7fc752167700 5 mds.3.log trim already expired segment 216605914/827234408294, 35 events debug 2023-09-30T15:10:56.521+0000 7fc752167700 5 mds.3.log trim already expired segment 216605949/827238527911, 1024 events debug 2023-09-30T15:10:56.521+0000 7fc752167700 5 mds.3.log trim already expired segment 216606973/827241813316, 344 events debug 2023-09-30T15:10:56.521+0000 7fc752167700 5 mds.3.log trim already expired segment 216607317/827242580233, 1024 events debug 2023-09-30T15:10:56.521+0000 7fc752167700 6 mds.3.journal LogSegment( 216608341/827244781542).try_to_expire debug 2023-09-30T15:10:56.521+0000 7fc752167700 4 mds.3.sessionmap save_if_dirty: writing 0 debug 2023-09-30T15:10:56.521+0000 7fc752167700 6 mds.3.journal LogSegment( 216608341/827244781542).try_to_expire success debug 2023-09-30T15:10:56.521+0000 7fc752167700 5 mds.3.log _expired segment 216608341/827244781542, 717 events
Ben <ruidong.gao@gmail.com> 于2023年9月27日周三 23:53写道：
some further investigation about three mds with trimming behind
to problem:
logs captured over two days show that, some log segments are stuck in trimming process. It looks like a bug with trimming log segment? Any thoughts? ==========log capture============
9/26:
debug 2023-09-26T16:50:59.004+0000 7fc74d95e700 10 mds.3.log _trim_expired_segments waiting for 197465903/720757956586 to expire
debug 2023-09-26T16:45:22.788+0000 7f9c253a8700 10 mds.4.log _trim_expired_segments waiting for 195341004/893374309813 to expire
debug 2023-09-26T14:11:37.681+0000 7f8f047cf700 10 mds.5.log _trim_expired_segments waiting for 189942575/642272326541 to expire
9/27:
debug 2023-09-27T15:35:04.841+0000 7fc74d95e700 10 mds.3.log _trim_expired_segments waiting for 197465903/720757956586 to expire
debug 2023-09-27T15:18:51.442+0000 7f9c29bb1700 10 mds.4.log _trim_expired_segments waiting for 195341004/893374309813 to expire
debug 2023-09-27T15:27:33.024+0000 7f8f047cf700 10 mds.5.log _trim_expired_segments waiting for 189942575/642272326541 to expire
Regards,
Ben
Ben <ruidong.gao@gmail.com> 于2023年9月26日周二 20:31写道：
Hi, see below for details of warnings. the cluster is running 17.2.5. the warnings have been around for a while. one concern of mine is num_segments growing over time. clients with warn of MDS_CLIENT_OLDEST_TID increase from 18 to 25 as well. The nodes are with kernel 4.19.0-91.82.42.uelc20.x86_64. It looks like bugs with client library. And rebooting nodes with problem will fix it for short period of time? Any suggestions from community for fixing?
Thanks, Ben
[root@8cd2c0657c77 /]# ceph health detail
HEALTH_WARN 6 hosts fail cephadm check; 2 clients failing to respond to capability release; 25 clients failing to advance oldest client/flush tid; 3 MDSs report slow requests; 3 MDSs behind on trimming
[WRN] CEPHADM_HOST_CHECK_FAILED: 6 hosts fail cephadm check
host host15w (192.168.31.33) failed check: Unable to reach remote host host15w. Process exited with non-zero exit status 1
host host20w (192.168.31.38) failed check: Unable to reach remote host host20w. Process exited with non-zero exit status 1
host host19w (192.168.31.37) failed check: Unable to reach remote host host19w. Process exited with non-zero exit status 1
host host17w (192.168.31.35) failed check: Unable to reach remote host host17w. Process exited with non-zero exit status 1
host host18w (192.168.31.36) failed check: Unable to reach remote host host18w. Process exited with non-zero exit status 1
host host16w (192.168.31.34) failed check: Unable to reach remote host host16w. Process exited with non-zero exit status 1
[WRN] MDS_CLIENT_LATE_RELEASE: 2 clients failing to respond to capability release
mds.code-store.host18w.fdsqff(mds.1): Client k8s-node36 failing to respond to capability release client_id: 460983
mds.code-store.host16w.vucirx(mds.3): Client failing to respond to capability release client_id: 460983
[WRN] MDS_CLIENT_OLDEST_TID: 25 clients failing to advance oldest client/flush tid
mds.code-store.host18w.fdsqff(mds.1): Client k8s-node36 failing to advance its oldest client/flush tid. client_id: 460983
mds.code-store.host18w.fdsqff(mds.1): Client failing to advance its oldest client/flush tid. client_id: 460226
mds.code-store.host18w.fdsqff(mds.1): Client k8s-node32 failing to advance its oldest client/flush tid. client_id: 239797
mds.code-store.host15w.reolpx(mds.5): Client k8s-node34 failing to advance its oldest client/flush tid. client_id: 460226
mds.code-store.host15w.reolpx(mds.5): Client k8s-node32 failing to advance its oldest client/flush tid. client_id: 239797
mds.code-store.host15w.reolpx(mds.5): Client failing to advance its oldest client/flush tid. client_id: 460983
mds.code-store.host18w.rtyvdy(mds.7): Client k8s-node34 failing to advance its oldest client/flush tid. client_id: 460226
mds.code-store.host18w.rtyvdy(mds.7): Client failing to advance its oldest client/flush tid. client_id: 239797
mds.code-store.host18w.rtyvdy(mds.7): Client k8s-node36 failing to advance its oldest client/flush tid. client_id: 460983
mds.code-store.host17w.kcdopb(mds.2): Client failing to advance its oldest client/flush tid. client_id: 239797
mds.code-store.host17w.kcdopb(mds.2): Client failing to advance its oldest client/flush tid. client_id: 460983
mds.code-store.host17w.kcdopb(mds.2): Client k8s-node34 failing to advance its oldest client/flush tid. client_id: 460226
mds.code-store.host17w.kcdopb(mds.2): Client k8s-node24 failing to advance its oldest client/flush tid. client_id: 12072730
mds.code-store.host20w.bfoftp(mds.4): Client k8s-node32 failing to advance its oldest client/flush tid. client_id: 239797
mds.code-store.host20w.bfoftp(mds.4): Client k8s-node36 failing to advance its oldest client/flush tid. client_id: 460983
mds.code-store.host19w.ywrmiz(mds.6): Client k8s-node24 failing to advance its oldest client/flush tid. client_id: 12072730
mds.code-store.host19w.ywrmiz(mds.6): Client k8s-node34 failing to advance its oldest client/flush tid. client_id: 460226
mds.code-store.host19w.ywrmiz(mds.6): Client failing to advance its oldest client/flush tid. client_id: 239797
mds.code-store.host19w.ywrmiz(mds.6): Client failing to advance its oldest client/flush tid. client_id: 460983
mds.code-store.host16w.vucirx(mds.3): Client failing to advance its oldest client/flush tid. client_id: 460983
mds.code-store.host16w.vucirx(mds.3): Client failing to advance its oldest client/flush tid. client_id: 460226
mds.code-store.host16w.vucirx(mds.3): Client failing to advance its oldest client/flush tid. client_id: 239797
mds.code-store.host17w.pdziet(mds.0): Client k8s-node32 failing to advance its oldest client/flush tid. client_id: 239797
mds.code-store.host17w.pdziet(mds.0): Client k8s-node34 failing to advance its oldest client/flush tid. client_id: 460226
mds.code-store.host17w.pdziet(mds.0): Client k8s-node36 failing to advance its oldest client/flush tid. client_id: 460983
[WRN] MDS_SLOW_REQUEST: 3 MDSs report slow requests
mds.code-store.host15w.reolpx(mds.5): 4 slow requests are blocked
5 secs
mds.code-store.host20w.bfoftp(mds.4): 6 slow requests are blocked
5 secs
mds.code-store.host16w.vucirx(mds.3): 97 slow requests are blocked > 5 secs
[WRN] MDS_TRIM: 3 MDSs behind on trimming
mds.code-store.host15w.reolpx(mds.5): Behind on trimming (25831/128) max_segments: 128, num_segments: 25831
mds.code-store.host20w.bfoftp(mds.4): Behind on trimming (27605/128) max_segments: 128, num_segments: 27605
mds.code-store.host16w.vucirx(mds.3): Behind on trimming (28676/128) max_segments: 128, num_segments: 28676
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-- Cheers, Venky