Hi,
I have stopped all 3 MON services sequentially.
After starting the 3 MON services again, the slow ops where gone.
However, just after 1 min. of MON service uptime, the slow ops are back
again, and the blocked time is increasing constantly.
root@ld3955:/home/ceph-scripts
# ceph -w
cluster:
id: 6b1b5117-6e08-4843-93d6-2da3cf8a6bae
health: HEALTH_WARN
17 nearfull osd(s)
1 pool(s) nearfull
2 slow ops, oldest one blocked for 63 sec, mon.ld5505 has
slow ops
services:
mon: 3 daemons, quorum ld5505,ld5506,ld5507 (age 67s)
mgr: ld5505(active, since 11d), standbys: ld5506, ld5507
mds: cephfs:2 {0=ld5507=up:active,1=ld5505=up:active} 2
up:standby-replay 3 up:standby
osd: 442 osds: 442 up (since 4w), 442 in (since 4w); 10 remapped pgs
data:
pools: 7 pools, 19628 pgs
objects: 72.14M objects, 275 TiB
usage: 826 TiB used, 705 TiB / 1.5 PiB avail
pgs: 16920/216422157 objects misplaced (0.008%)
19618 active+clean
10 active+remapped+backfilling
io:
client: 454 KiB/s rd, 15 MiB/s wr, 905 op/s rd, 463 op/s wr
recovery: 125 MiB/s, 31 objects/s
2020-03-05 09:21:48.647440 mon.ld5505 [WRN] Health check update: 2 slow
ops, oldest one blocked for 63 sec, mon.ld5505 has slow ops (SLOW_OPS)
2020-03-05 09:21:53.648708 mon.ld5505 [WRN] Health check update: 2 slow
ops, oldest one blocked for 68 sec, mon.ld5505 has slow ops (SLOW_OPS)
2020-03-05 09:21:58.650186 mon.ld5505 [WRN] Health check update: 2 slow
ops, oldest one blocked for 73 sec, mon.ld5505 has slow ops (SLOW_OPS)
2020-03-05 09:22:03.651447 mon.ld5505 [WRN] Health check update: 2 slow
ops, oldest one blocked for 78 sec, mon.ld5505 has slow ops (SLOW_OPS)
2020-03-05 09:22:08.653066 mon.ld5505 [WRN] Health check update: 2 slow
ops, oldest one blocked for 83 sec, mon.ld5505 has slow ops (SLOW_OPS)
2020-03-05 09:22:13.654699 mon.ld5505 [WRN] Health check update: 2 slow
ops, oldest one blocked for 88 sec, mon.ld5505 has slow ops (SLOW_OPS)
2020-03-05 09:22:18.655912 mon.ld5505 [WRN] Health check update: 2 slow
ops, oldest one blocked for 93 sec, mon.ld5505 has slow ops (SLOW_OPS)
2020-03-05 09:22:23.657263 mon.ld5505 [WRN] Health check update: 2 slow
ops, oldest one blocked for 98 sec, mon.ld5505 has slow ops (SLOW_OPS)
2020-03-05 09:22:28.658514 mon.ld5505 [WRN] Health check update: 2 slow
ops, oldest one blocked for 103 sec, mon.ld5505 has slow ops (SLOW_OPS)
2020-03-05 09:22:33.659965 mon.ld5505 [WRN] Health check update: 2 slow
ops, oldest one blocked for 108 sec, mon.ld5505 has slow ops (SLOW_OPS)
2020-03-05 09:22:38.661360 mon.ld5505 [WRN] Health check update: 2 slow
ops, oldest one blocked for 113 sec, mon.ld5505 has slow ops (SLOW_OPS)
2020-03-05 09:22:43.662727 mon.ld5505 [WRN] Health check update: 2 slow
ops, oldest one blocked for 118 sec, mon.ld5505 has slow ops (SLOW_OPS)
2020-03-05 09:22:48.663940 mon.ld5505 [WRN] Health check update: 2 slow
ops, oldest one blocked for 123 sec, mon.ld5505 has slow ops (SLOW_OPS)
2020-03-05 09:22:53.685451 mon.ld5505 [WRN] Health check update: 2 slow
ops, oldest one blocked for 128 sec, mon.ld5505 has slow ops (SLOW_OPS)
2020-03-05 09:22:58.691603 mon.ld5505 [WRN] Health check update: 2 slow
ops, oldest one blocked for 133 sec, mon.ld5505 has slow ops (SLOW_OPS)
2020-03-05 09:23:03.692841 mon.ld5505 [WRN] Health check update: 2 slow
ops, oldest one blocked for 138 sec, mon.ld5505 has slow ops (SLOW_OPS)
2020-03-05 09:23:08.694502 mon.ld5505 [WRN] Health check update: 2 slow
ops, oldest one blocked for 143 sec, mon.ld5505 has slow ops (SLOW_OPS)
2020-03-05 09:23:13.695991 mon.ld5505 [WRN] Health check update: 2 slow
ops, oldest one blocked for 148 sec, mon.ld5505 has slow ops (SLOW_OPS)
2020-03-05 09:23:18.697689 mon.ld5505 [WRN] Health check update: 2 slow
ops, oldest one blocked for 153 sec, mon.ld5505 has slow ops (SLOW_OPS)
2020-03-05 09:23:23.698945 mon.ld5505 [WRN] Health check update: 2 slow
ops, oldest one blocked for 158 sec, mon.ld5505 has slow ops (SLOW_OPS)
2020-03-05 09:23:28.700331 mon.ld5505 [WRN] Health check update: 2 slow
ops, oldest one blocked for 163 sec, mon.ld5505 has slow ops (SLOW_OPS)
2020-03-05 09:23:33.701754 mon.ld5505 [WRN] Health check update: 2 slow
ops, oldest one blocked for 168 sec, mon.ld5505 has slow ops (SLOW_OPS)
2020-03-05 09:23:38.703021 mon.ld5505 [WRN] Health check update: 2 slow
ops, oldest one blocked for 173 sec, mon.ld5505 has slow ops (SLOW_OPS)
2020-03-05 09:23:43.704396 mon.ld5505 [WRN] Health check update: 2 slow
ops, oldest one blocked for 178 sec, mon.ld5505 has slow ops (SLOW_OPS)
I have the impression that this is not a harmless bug anymore.
Please advise how to proceed.
THX
Am 17.02.2020 um 18:31 schrieb Paul Emmerich:
> that's probably just https://tracker.ceph.com/issues/43893
> (a harmless bug)
>
> Restart the mons to get rid of the message
>
> Paul
>
> -- Paul Emmerich Looking for help with your Ceph cluster? Contact us
> at https://croit.io croit GmbH Freseniusstr. 31h 81247 München
> www.croit.io Tel: +49 89 1896585 90 On Mon, Feb 17, 2020 at 2:59 PM
> Thomas Schneider <74cmonty@xxxxxxxxx> wrote:
>> Hi,
>>
>> the current output of ceph -s reports a warning:
>> 2 slow ops, oldest one blocked for 347335 sec, mon.ld5505 has slow ops
>> This time is increasing.
>>
>> root@ld3955:~# ceph -s
>> cluster:
>> id: 6b1b5117-6e08-4843-93d6-2da3cf8a6bae
>> health: HEALTH_WARN
>> 9 daemons have recently crashed
>> 2 slow ops, oldest one blocked for 347335 sec, mon.ld5505
>> has slow ops
>>
>> services:
>> mon: 3 daemons, quorum ld5505,ld5506,ld5507 (age 3d)
>> mgr: ld5507(active, since 8m), standbys: ld5506, ld5505
>> mds: cephfs:2 {0=ld5507=up:active,1=ld5505=up:active} 2
>> up:standby-replay 3 up:standby
>> osd: 442 osds: 442 up (since 8d), 442 in (since 9d)
>>
>> data:
>> pools: 7 pools, 19628 pgs
>> objects: 65.78M objects, 251 TiB
>> usage: 753 TiB used, 779 TiB / 1.5 PiB avail
>> pgs: 19628 active+clean
>>
>> io:
>> client: 427 KiB/s rd, 22 MiB/s wr, 851 op/s rd, 647 op/s wr
>>
>> The details are as follows:
>> root@ld3955:~# ceph health detail
>> HEALTH_WARN 9 daemons have recently crashed; 2 slow ops, oldest one
>> blocked for 347755 sec, mon.ld5505 has slow ops
>> RECENT_CRASH 9 daemons have recently crashed
>> mds.ld4464 crashed on host ld4464 at 2020-02-09 07:33:59.131171Z
>> mds.ld5506 crashed on host ld5506 at 2020-02-09 07:42:52.036592Z
>> mds.ld4257 crashed on host ld4257 at 2020-02-09 07:47:44.369505Z
>> mds.ld4464 crashed on host ld4464 at 2020-02-09 06:10:24.515912Z
>> mds.ld5507 crashed on host ld5507 at 2020-02-09 07:13:22.400268Z
>> mds.ld4257 crashed on host ld4257 at 2020-02-09 06:48:34.742475Z
>> mds.ld5506 crashed on host ld5506 at 2020-02-09 06:10:24.680648Z
>> mds.ld4465 crashed on host ld4465 at 2020-02-09 06:52:33.204855Z
>> mds.ld5506 crashed on host ld5506 at 2020-02-06 07:59:37.089007Z
>> SLOW_OPS 2 slow ops, oldest one blocked for 347755 sec, mon.ld5505 has
>> slow ops
>>
>> There's no error on services (mgr, mon, osd).
>>
>> Can you please advise how to identify the root cause of this slow ops?
>>
>> THX
>>
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