HI, I have a ceph cluster (ceph 10.2.5) witch 3 node, each has two osds. It was a power outage last night and all the server are restarted this morning again. All osds are work well except the osd.0. ID WEIGHT TYPE NAME UP/DOWN REWEIGHT PRIMARY-AFFINITY -1 0.04500 root volumes -2 0.01500 host zk25-02 0 0.01500 osd.0 down 0 1.00000 1 0.01500 osd.1 up 1.00000 1.00000 -3 0.01500 host zk25-03 2 0.01500 osd.2 up 1.00000 1.00000 3 0.01500 osd.3 up 1.00000 1.00000 -4 0.01500 host zk25-01 4 0.01500 osd.4 up 1.00000 1.00000 5 0.01500 osd.5 up 1.00000 1.00000 I tried to run it again with gdb, it turned it like this: (gdb) bt #0 0x00007ffff4cfd5f7 in raise () from /lib64/libc.so.6 #1 0x00007ffff4cfece8 in abort () from /lib64/libc.so.6 #2 0x00007ffff56019d5 in __gnu_cxx::__verbose_terminate_handler() () from /lib64/libstdc++.so.6 #3 0x00007ffff55ff946 in ?? () from /lib64/libstdc++.so.6 #4 0x00007ffff55ff973 in std::terminate() () from /lib64/libstdc++.so.6 #5 0x00007ffff55ffb93 in __cxa_throw () from /lib64/libstdc++.so.6 #6 0x0000555555b93b7f in pg_pool_t::decode (this=<optimized out>, bl=...) at osd/osd_types.cc:1569 #7 0x0000555555f3a53f in decode (p=..., c=...) at osd/osd_types.h:1487 #8 decode<long, pg_pool_t> (m=Python Exception <type 'exceptions.IndexError'> list index out of range: std::map with 1 elements, p=...) at include/encoding.h:648 #9 0x0000555555f2fa8d in OSDMap::decode_classic (this=this@entry=0x55555fdf6480, p=...) at osd/OSDMap.cc:2026 #10 0x0000555555f2fe8c in OSDMap::decode (this=this@entry=0x55555fdf6480, bl=...) at osd/OSDMap.cc:2116 #11 0x0000555555f3116e in OSDMap::decode (this=0x55555fdf6480, bl=...) at osd/OSDMap.cc:1985 #12 0x00005555558e51fc in OSDService::try_get_map (this=0x55555ff51860, epoch=76) at osd/OSD.cc:1340 #13 0x0000555555947ece in OSDService::get_map (this=<optimized out>, e=<optimized out>, this=<optimized out>) at osd/OSD.h:884 #14 0x00005555558fb0f2 in OSD::init (this=0x55555ff50000) at osd/OSD.h:1917 #15 0x000055555585eea5 in main (argc=<optimized out>, argv=<optimized out>) at ceph_osd.cc:605 it was caused by failed undecoded of osdmap structure from osdmap file(/var/lib/ceph/osd/ceph-0/current/meta/osdmap.76__0_64173F9C__none) . And by comparing the same file on osd.1, It make sure the osdmap file has been corrupted. Any one know how to fix it ? Thanks for advance ! -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html