pg stuck in peering state

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Hi all,

I reboot all my osd node after, I got some pg stuck in peering state.

root@ceph-osd-3:/var/log/ceph# ceph -s
    cluster 186717a6-bf80-4203-91ed-50d54fe8dec4
     health HEALTH_WARN
            clock skew detected on mon.ceph-osd-2
            33 pgs peering
            33 pgs stuck inactive
            33 pgs stuck unclean
            Monitor clock skew detected 
     monmap e1: 3 mons at {ceph-osd-1=10.200.1.11:6789/0,ceph-osd-2=10.200.1.12:6789/0,ceph-osd-3=10.200.1.13:6789/0}
            election epoch 14, quorum 0,1,2 ceph-osd-1,ceph-osd-2,ceph-osd-3
     osdmap e66: 8 osds: 8 up, 8 in
      pgmap v1346: 264 pgs, 3 pools, 272 MB data, 653 objects
            808 MB used, 31863 MB / 32672 MB avail
                 231 active+clean
                  33 peering
root@ceph-osd-3:/var/log/ceph# 


root@ceph-osd-3:/var/log/ceph# ceph pg dump_stuck 
ok
pg_stat state up up_primary acting acting_primary
4.2d peering [2,0] 2 [2,0] 2
1.57 peering [3,0] 3 [3,0] 3
1.24 peering [3,0] 3 [3,0] 3
1.52 peering [0,2] 0 [0,2] 0
1.50 peering [2,0] 2 [2,0] 2
1.23 peering [3,0] 3 [3,0] 3
4.54 peering [2,0] 2 [2,0] 2
4.19 peering [3,0] 3 [3,0] 3
1.4b peering [0,3] 0 [0,3] 0
1.49 peering [0,3] 0 [0,3] 0
0.17 peering [0,3] 0 [0,3] 0
4.17 peering [0,3] 0 [0,3] 0
4.16 peering [0,3] 0 [0,3] 0
0.10 peering [0,3] 0 [0,3] 0
1.11 peering [0,2] 0 [0,2] 0
4.b peering [0,2] 0 [0,2] 0
1.3c peering [0,3] 0 [0,3] 0
0.c peering [0,3] 0 [0,3] 0
1.3a peering [3,0] 3 [3,0] 3
0.38 peering [2,0] 2 [2,0] 2
1.39 peering [0,2] 0 [0,2] 0
4.33 peering [2,0] 2 [2,0] 2
4.62 peering [2,0] 2 [2,0] 2
4.3 peering [0,2] 0 [0,2] 0
0.6 peering [0,2] 0 [0,2] 0
0.4 peering [2,0] 2 [2,0] 2
0.3 peering [2,0] 2 [2,0] 2
1.60 peering [0,3] 0 [0,3] 0
0.2 peering [3,0] 3 [3,0] 3
4.6 peering [3,0] 3 [3,0] 3
1.30 peering [0,3] 0 [0,3] 0
1.2f peering [0,2] 0 [0,2] 0
1.2a peering [3,0] 3 [3,0] 3
root@ceph-osd-3:/var/log/ceph# 


root@ceph-osd-3:/var/log/ceph# ceph osd tree
ID WEIGHT  TYPE NAME                     UP/DOWN REWEIGHT PRIMARY-AFFINITY 
-9 4.00000 root default                                                    
-8 4.00000     region eu-west-1                                            
-6 2.00000         datacenter eu-west-1a                                   
-2 2.00000             host ceph-osd-1                                     
 0 1.00000                 osd.0              up  1.00000          1.00000 
 1 1.00000                 osd.1              up  1.00000          1.00000 
-4 2.00000             host ceph-osd-3                                     
 4 1.00000                 osd.4              up  1.00000          1.00000 
 5 1.00000                 osd.5              up  1.00000          1.00000 
-7 2.00000         datacenter eu-west-1b                                   
-3 2.00000             host ceph-osd-2                                     
 2 1.00000                 osd.2              up  1.00000          1.00000 
 3 1.00000                 osd.3              up  1.00000          1.00000 
-5 2.00000             host ceph-osd-4                                     
 6 1.00000                 osd.6              up  1.00000          1.00000 
 7 1.00000                 osd.7              up  1.00000          1.00000 
root@ceph-osd-3:/var/log/ceph#

Do you have guys any idea ? Why they stay in this state ?
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