[ceph-users] PGs degraded after osd restart

Hi cephists, We have a 10 node cluster running Nautilus 14.2.9 All objects are on EC pool. We have mgr balancer plugin in upmap mode doing it's rebalancing: health: HEALTH_OK pgs: 1985 active+clean 190 active+remapped+backfilling 65 active+remapped+backfill_wait io: client: 0 B/s wr, 0 op/s rd, 0 op/s wr recovery: 770 MiB/s, 463 objects/s We have restarted osd.0 on one of our OSD nodes, and this was the status immediately after: ``` health: HEALTH_WARN 1 osds down Degraded data redundancy: 4531479/531067647 objects degraded (0.853%), 109 pgs degraded ``` Then OSD became UP again: ``` health: HEALTH_WARN Degraded data redundancy: 4963207/531067545 objects degraded (0.935%), 120 pgs degraded ``` And after a minute or so has passed it settled on: ``` health: HEALTH_WARN Degraded data redundancy: 295515/531067347 objects degraded (0.056%), 10 pgs degraded, 10 pgs undersized ``` upmap balancer was running during osd.0 restart, the restart was successfull, without any issues. This left us wondering - how could a simple osd restart cause degraded PGs? Could this be related to the upmap balancer running? Thanks! -- Vyteni