Hi Alexander,
I'd be suspicious that something is up with pool 25. Which pool is
that? ('ceph osd pool ls detail') Knowing the pool and the CRUSH rule
it's using is a good place to start. Then that can be compared to your
CRUSH map (e.g. 'ceph osd tree') to see why Ceph is struggling to map
that PG to a valid up set.
Josh
On Tue, Oct 25, 2022 at 6:45 AM Alexander Fiedler
<alexander.fiedler@xxxxxxxx> wrote:
>
> Hello,
>
> we run a ceph cluster with the following error which came up suddenly without any maintenance/changes:
>
> HEALTH_WARN Reduced data availability: 1 pg stale; Degraded data redundancy: 1 pg undersized
>
> The PG in question is PG 25
>
> Output of ceph pg dump_stuck stale:
>
> PG_STAT STATE UP UP_PRIMARY ACTING ACTING_PRIMARY
> 25.0 stale+active+undersized+remapped [] -1 [66,64] 66
>
> Both acting OSDs and the mons+managers were rebooted. All OSDs in the cluster are up.
>
> Do you have any idea why 1 PG is stuck?
>
> Best regards
>
> Alexander Fiedler
>
>
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