Hi, Suddenly we have a recovery_unfound situation. I find that PG acting set is missing some OSDs which are up. Why can't OSD 3 and 71 on following PG query result be members of PG acting set? Currently, we use v15.2.8. How to recover from this situation? { "snap_trimq": "[]", "snap_trimq_len": 0, "state": "active+forced_recovery+recovery_unfound+undersized+degraded+remapped", "epoch": 237505, "up": [ 3, 237, 71, 132, 115, 56 ], "acting": [ 2147483647, 237, 2147483647, 132, 115, 56 ], "backfill_targets": [ "3(0)", "71(2)" ], "acting_recovery_backfill": [ "3(0)", "56(5)", "71(2)", "115(4)", "132(3)", "237(1)" ], Best regards.