Re: Identify slow ops

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that's probably just https://tracker.ceph.com/issues/43893
(a harmless bug)

Restart the mons to get rid of the message

Paul

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Paul Emmerich

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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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