PG down, due to 3 OSD failing

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Hallo,
all of a sudden, 3 of my OSDs failed, showing similar messages in the log:

.....
-5> 2022-03-28 14:19:02.451 7fc20fe99700 5 osd.145 pg_epoch: 616454 pg[70.2c6s1( empty local-lis/les=612106/612107 n=0 ec=148456/148456 lis/c 612106/612106 les/c/f 612107/612107/0 612106/612106/612101) [168,145,102,96,112,124,128,134,56,34]p168(0) r=1 lpr=616429 crt=0'0 unknown mbc={}]
enter Started
-4> 2022-03-28 14:19:02.451 7fc20fe99700 5 osd.145 pg_epoch: 616454 pg[70.2c6s1( empty local-lis/les=612106/612107 n=0 ec=148456/148456 lis/c 612106/612106 les/c/f 612107/612107/0 612106/612106/612101) [168,145,102,96,112,124,128,134,56,34]p168(0) r=1 lpr=616429 crt=0'0 unknown mbc={}]
enter Start
-3> 2022-03-28 14:19:02.451 7fc20fe99700 1 osd.145 pg_epoch: 616454 pg[70.2c6s1( empty local-lis/les=612106/612107 n=0 ec=148456/148456 lis/c 612106/612106 les/c/f 612107/612107/0 612106/612106/612101) [168,145,102,96,112,124,128,134,56,34]p168(0) r=1 lpr=616429 crt=0'0 unknown mbc={}]
state<Start>: transitioning to Stray
-2> 2022-03-28 14:19:02.451 7fc20fe99700 5 osd.145 pg_epoch: 616454 pg[70.2c6s1( empty local-lis/les=612106/612107 n=0 ec=148456/148456 lis/c 612106/612106 les/c/f 612107/612107/0 612106/612106/612101) [168,145,102,96,112,124,128,134,56,34]p168(0) r=1 lpr=616429 crt=0'0 unknown mbc={}]
exit Start 0.000008 0 0.000000
-1> 2022-03-28 14:19:02.451 7fc20fe99700 5 osd.145 pg_epoch: 616454 pg[70.2c6s1( empty local-lis/les=612106/612107 n=0 ec=148456/148456 lis/c 612106/612106 les/c/f 612107/612107/0 612106/612106/612101) [168,145,102,96,112,124,128,134,56,34]p168(0) r=1 lpr=616429 crt=0'0 unknown mbc={}]
enter Started/Stray
0> 2022-03-28 14:19:02.451 7fc20f698700 -1 *** Caught signal (Aborted) **
 in thread 7fc20f698700 thread_name:tp_osd_tp

ceph version 14.2.22 (ca74598065096e6fcbd8433c8779a2be0c889351) nautilus (stable)
 1: (()+0x12ce0) [0x7fc2327dcce0]
 2: (gsignal()+0x10f) [0x7fc231452a4f]
 3: (abort()+0x127) [0x7fc231425db5]
4: (ceph::__ceph_abort(char const*, int, char const*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)+0x1b4) [0x55b8139cb671]
 5: (PG::check_past_interval_bounds() const+0xc16) [0x55b813b586f6]
6: (PG::RecoveryState::Reset::react(PG::AdvMap const&)+0x3e8) [0x55b813b963d8] 7: (boost::statechart::simple_state<PG::RecoveryState::Reset, PG::RecoveryState::RecoveryMachine, boost::mpl::list<mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na>, (boost::statechart::history_mode)0>::react_impl(boost::statechart::event_base const&, void const*)+0x7d) [0x55b813bdd32d] 8: (PG::handle_advance_map(std::shared_ptr<OSDMap const>, std::shared_ptr<OSDMap const>, std::vector<int, std::allocator<int> >&, int, std::vector<int, std::allocator<int> >&, int, PG::RecoveryCtx*)+0x39d) [0x55b813b7b5fd] 9: (OSD::advance_pg(unsigned int, PG*, ThreadPool::TPHandle&, PG::RecoveryCtx*)+0x2e9) [0x55b813ad14e9] 10: (OSD::dequeue_peering_evt(OSDShard*, PG*, std::shared_ptr<PGPeeringEvent>, ThreadPool::TPHandle&)+0xaa) [0x55b813ae345a] 11: (PGPeeringItem::run(OSD*, OSDShard*, boost::intrusive_ptr<PG>&, ThreadPool::TPHandle&)+0x55) [0x55b813d66c15] 12: (OSD::ShardedOpWQ::_process(unsigned int, ceph::heartbeat_handle_d*)+0x1366) [0x55b813adff46] 13: (ShardedThreadPool::shardedthreadpool_worker(unsigned int)+0x5c4) [0x55b8140dc944]
 14: (ShardedThreadPool::WorkThreadSharded::entry()+0x14) [0x55b8140df514]
 15: (()+0x81cf) [0x7fc2327d21cf]
 16: (clone()+0x43) [0x7fc23143dd83]

Trying to "activate --all", rebotting server, and such, did not help.

I am now stuck with one PG (85.25) down, find below the output from "query".

The PG belongs to a 3+2 erasure-coded pool.
As the devices corresponding to the 3 down OSDs are properly mounted, is there a way to get PG.ID=85.25 from the devices and copy it elsewhere?
Actually, I tried to find 85.25 in the 3 down OSDs with command:
~]# ceph-objectstore-tool --data-path /var/lib/ceph/osd/cephpa1-158/ --no-mon-config --pgid 85.25 --op export --file /tmp/pg_85-25
PG '85.25' not found
which puzzled me... is there a way to search such PG.ID over the whole cluster?

  Thanks for your help!

			Fulvio

====================

~]# ceph --cluster cephpa1 health detail | grep down
.....
PG_AVAILABILITY Reduced data availability: 1 pg inactive, 1 pg down
pg 85.25 is down+remapped, acting [2147483647,2147483647,96,2147483647,2147483647]
~]# ceph --cluster cephpa1 pg 85.25 query
{
    "state": "down+remapped",
    "snap_trimq": "[]",
    "snap_trimq_len": 0,
    "epoch": 617667,
    "up": [
        2147483647,
        2147483647,
        2147483647,
        2147483647,
        2147483647
    ],
    "acting": [
        2147483647,
        2147483647,
        96,
        2147483647,
        2147483647
    ],
    "info": {
        "pgid": "85.25s2",
        "last_update": "606021'521273",
        "last_complete": "606021'521273",
        "log_tail": "605873'518175",
        "last_user_version": 521273,
        "last_backfill": "MAX",
        "last_backfill_bitwise": 1,
        "purged_snaps": [],
        "history": {
            "epoch_created": 478130,
            "epoch_pool_created": 478130,
            "last_epoch_started": 611605,
            "last_interval_started": 611604,
            "last_epoch_clean": 595152,
            "last_interval_clean": 595151,
            "last_epoch_split": 0,
            "last_epoch_marked_full": 0,
            "same_up_since": 617661,
            "same_interval_since": 617661,
            "same_primary_since": 616519,
            "last_scrub": "597862'517979",
            "last_scrub_stamp": "2022-03-15 05:08:42.561720",
            "last_deep_scrub": "597454'511650",
            "last_deep_scrub_stamp": "2022-03-09 18:05:34.205121",
            "last_clean_scrub_stamp": "2022-03-15 05:08:42.561720"
        },
        "stats": {
            "version": "606021'521273",
            "reported_seq": "1733225",
            "reported_epoch": "617667",
            "state": "down+remapped",
            "last_fresh": "2022-03-28 14:17:48.920542",
            "last_change": "2022-03-28 14:15:42.025193",
            "last_active": "2022-03-25 15:24:42.557667",
            "last_peered": "2022-03-25 15:24:25.912029",
            "last_clean": "2022-03-15 01:50:02.979366",
            "last_became_active": "2022-03-25 12:44:52.379711",
            "last_became_peered": "2022-03-25 12:44:52.379711",
            "last_unstale": "2022-03-28 14:17:48.920542",
            "last_undegraded": "2022-03-28 14:17:48.920542",
            "last_fullsized": "2022-03-28 14:17:48.920542",
            "mapping_epoch": 617661,
            "log_start": "605873'518175",
            "ondisk_log_start": "605873'518175",
            "created": 478130,
            "last_epoch_clean": 595152,
            "parent": "0.0",
            "parent_split_bits": 0,
            "last_scrub": "597862'517979",
            "last_scrub_stamp": "2022-03-15 05:08:42.561720",
            "last_deep_scrub": "597454'511650",
            "last_deep_scrub_stamp": "2022-03-09 18:05:34.205121",
            "last_clean_scrub_stamp": "2022-03-15 05:08:42.561720",
            "log_size": 3098,
            "ondisk_log_size": 3098,
            "stats_invalid": false,
            "dirty_stats_invalid": false,
            "omap_stats_invalid": false,
            "hitset_stats_invalid": false,
            "hitset_bytes_stats_invalid": false,
            "pin_stats_invalid": false,
            "manifest_stats_invalid": false,
            "snaptrimq_len": 0,
            "stat_sum": {
                "num_bytes": 165108592640,
                "num_objects": 39402,
                "num_object_clones": 0,
                "num_object_copies": 197010,
                "num_objects_missing_on_primary": 0,
                "num_objects_missing": 0,
                "num_objects_degraded": 0,
                "num_objects_misplaced": 0,
                "num_objects_unfound": 0,
                "num_objects_dirty": 39402,
                "num_whiteouts": 0,
                "num_read": 338705,
                "num_read_kb": 124297874,
                "num_write": 316971,
                "num_write_kb": 311968402,
                "num_scrub_errors": 0,
                "num_shallow_scrub_errors": 0,
                "num_deep_scrub_errors": 0,
                "num_objects_recovered": 196778,
                "num_bytes_recovered": 824577241088,
                "num_keys_recovered": 0,
                "num_objects_omap": 0,
                "num_objects_hit_set_archive": 0,
                "num_bytes_hit_set_archive": 0,
                "num_flush": 0,
                "num_flush_kb": 0,
                "num_evict": 0,
                "num_evict_kb": 0,
                "num_promote": 0,
                "num_flush_mode_high": 0,
                "num_flush_mode_low": 0,
                "num_evict_mode_some": 0,
                "num_evict_mode_full": 0,
                "num_objects_pinned": 0,
                "num_legacy_snapsets": 0,
                "num_large_omap_objects": 0,
                "num_objects_manifest": 0,
                "num_omap_bytes": 0,
                "num_omap_keys": 0,
                "num_objects_repaired": 0
            },
            "up": [
                2147483647,
                2147483647,
                2147483647,
                2147483647,
                2147483647
            ],
            "acting": [
                2147483647,
                2147483647,
                96,
                2147483647,
                2147483647
            ],
            "avail_no_missing": [],
            "object_location_counts": [],
            "blocked_by": [
                121
            ],
            "up_primary": -1,
            "acting_primary": 96,
            "purged_snaps": []
        },
        "empty": 0,
        "dne": 0,
        "incomplete": 0,
        "last_epoch_started": 616455,
        "hit_set_history": {
            "current_last_update": "0'0",
            "history": []
        }
    },
    "peer_info": [],
    "recovery_state": [
        {
            "name": "Started/Primary/Peering/Down",
            "enter_time": "2022-03-28 14:15:42.025185",
            "comment": "not enough up instances of this PG to go active"
        },
        {
            "name": "Started/Primary/Peering",
            "enter_time": "2022-03-28 14:15:42.025128",
            "past_intervals": [
                {
                    "first": "595151",
                    "last": "617660",
                    "all_participants": [
                        {
                            "osd": 77,
                            "shard": 0
                        },
                        {
                            "osd": 82,
                            "shard": 2
                        },
                        {
                            "osd": 90,
                            "shard": 0
                        },
                        {
                            "osd": 91,
                            "shard": 4
                        },
                        {
                            "osd": 96,
                            "shard": 2
                        },
                        {
                            "osd": 121,
                            "shard": 3
                        },
                        {
                            "osd": 140,
                            "shard": 1
                        },
                        {
                            "osd": 159,
                            "shard": 4
                        }
                    ],
                    "intervals": [
                        {
                            "first": "610237",
                            "last": "611219",
                            "acting": "96(2),121(3),159(4)"
                        },
                        {
                            "first": "611604",
                            "last": "616452",
                            "acting": "121(3),140(1),159(4)"
                        },
                        {
                            "first": "616461",
                            "last": "616518",
                            "acting": "96(2),140(1),159(4)"
                        }
                    ]
                }
            ],
            "probing_osds": [
                "77(0)",
                "82(2)",
                "90(0)",
                "91(4)",
                "96(2)",
                "140(1)",
                "159(4)"
            ],
            "blocked": "peering is blocked due to down osds",
            "down_osds_we_would_probe": [
                121
            ],
            "peering_blocked_by": [
                {
                    "osd": 121,
                    "current_lost_at": 0,
"comment": "starting or marking this osd lost may let us proceed"
                }
            ]
        },
        {
            "name": "Started",
            "enter_time": "2022-03-28 14:15:42.025068"
        }
    ],
    "agent_state": {}
}
[



--
Fulvio Galeazzi
GARR-CSD Department
skype: fgaleazzi70
tel.: +39-334-6533-250
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