Today, one of our Ceph OSDs was down, I've check syslog and see this OSD process was killed by OMM
Nov 17 10:01:06 ceph1 kernel: [2807926.762304] Out of memory: Kill process 3330 (ceph-osd) score 7 or sacrifice child
Nov 17 10:01:06 ceph1 kernel: [2807926.763745] Killed process 3330 (ceph-osd) total-vm:2372392kB, anon-rss:559084kB, file-rss:7268kB
Nov 17 10:01:06 ceph1 kernel: [2807926.985830] init: ceph-osd (ceph/6) main process (3330) killed by KILL signal
Nov 17 10:01:06 ceph1 kernel: [2807926.985844] init: ceph-osd (ceph/6) main process ended, respawning
Nov 17 10:03:39 ceph1 bash: root [15524]: sudo ceph health detail [0]
Nov 17 10:03:40 ceph1 bash: root [15524]: sudo ceph health detail [0]
Nov 17 10:17:01 ceph1 CRON[75167]: (root) CMD ( cd / && run-parts --report /etc/cron.hourly)
Nov 17 10:47:17 ceph1 kernel: [2810698.553690] ceph-status.sh invoked oom-killer: gfp_mask=0x26000c0, order=2, oom_score_adj=0
Nov 17 10:47:17 ceph1 kernel: [2810698.553693] ceph-status.sh cpuset=/ mems_allowed=0
Nov 17 10:47:17 ceph1 kernel: [2810698.553697] CPU: 5 PID: 194271 Comm: ceph-status.sh Not tainted 4.4.0-62-generic #83~14.04.1-Ubuntu
Nov 17 10:47:17 ceph1 kernel: [2810698.553698] Hardware name: Dell Inc. PowerEdge R730xd/072T6D, BIOS 2.5.5 08/16/2017
Nov 17 10:47:17 ceph1 kernel: [2810698.553699] 0000000000000000 ffff88001a857b38 ffffffff813dc4ac ffff88001a857cf0
Nov 17 10:47:17 ceph1 kernel: [2810698.553701] 0000000000000000 ffff88001a857bc8 ffffffff811fb066 ffff88083d29e200
Nov 17 10:47:17 ceph1 kernel: [2810698.553703] ffff88001a857cf0 ffff88001a857c00 ffff8808453cf000 0000000000000000
Nov 17 10:47:17 ceph1 kernel: [2810698.553704] Call Trace:
Nov 17 10:47:17 ceph1 kernel: [2810698.553709] [<ffffffff813dc4ac>] dump_stack+0x63/0x87
Nov 17 10:47:17 ceph1 kernel: [2810698.553713] [<ffffffff811fb066>] dump_header+0x5b/0x1d5
Nov 17 10:47:17 ceph1 kernel: [2810698.553717] [<ffffffff81188b75>] oom_kill_process+0x205/0x3d0
Nov 17 10:47:17 ceph1 kernel: [2810698.553718] [<ffffffff8118857e>] ? oom_unkillable_task+0x9e/0xc0
Nov 17 10:47:17 ceph1 kernel: [2810698.553720] [<ffffffff811891ab>] out_of_memory+0x40b/0x460
Nov 17 10:47:17 ceph1 kernel: [2810698.553722] [<ffffffff811fbb1f>] __alloc_pages_slowpath.constprop.87+0x742/0x7ad
Nov 17 10:47:17 ceph1 kernel: [2810698.553725] [<ffffffff8118e1a7>] __alloc_pages_nodemask+0x237/0x240
Nov 17 10:47:17 ceph1 kernel: [2810698.553727] [<ffffffff8118e36d>] alloc_kmem_pages_node+0x4d/0xd0
Nov 17 10:47:17 ceph1 kernel: [2810698.553730] [<ffffffff8107c125>] copy_process+0x185/0x1ce0
Nov 17 10:47:17 ceph1 kernel: [2810698.553732] [<ffffffff813320f3>] ? security_file_alloc+0x33/0x50
Nov 17 10:47:17 ceph1 kernel: [2810698.553734] [<ffffffff8107de1a>] _do_fork+0x8a/0x310
Nov 17 10:47:17 ceph1 kernel: [2810698.553737] [<ffffffff8108dc01>] ? sigprocmask+0x51/0x80
Nov 17 10:47:17 ceph1 kernel: [2810698.553738] [<ffffffff8107e149>] SyS_clone+0x19/0x20
Nov 17 10:47:17 ceph1 kernel: [2810698.553743] [<ffffffff81802d36>] entry_SYSCALL_64_fastpath+0x16/0x75
Nov 17 10:47:17 ceph1 kernel: [2810698.553744] Mem-Info:
Nov 17 10:47:17 ceph1 kernel: [2810698.553747] active_anon:798964 inactive_anon:187711 isolated_anon:0
Nov 17 10:47:17 ceph1 kernel: [2810698.553747] active_file:3299435 inactive_file:3242497 isolated_file:9
Nov 17 10:47:17 ceph1 kernel: [2810698.553747] unevictable:0 dirty:18678 writeback:949 unstable:0
Nov 17 10:47:17 ceph1 kernel: [2810698.553747] slab_reclaimable:238396 slab_unreclaimable:142741
Nov 17 10:47:17 ceph1 kernel: [2810698.553747] mapped:12429 shmem:319 pagetables:6616 bounce:0
Nov 17 10:47:17 ceph1 kernel: [2810698.553747] free:96727 free_pcp:0 free_cma:0
Nov 17 10:47:17 ceph1 kernel: [2810698.553749] Node 0 DMA free:14828kB min:32kB low:40kB high:48kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:15996kB managed:15896kB mlocked:0kB dirty:0kB writeback:0kB mapped:0kB shmem:0kB slab_reclaimable:0kB slab_unreclaimable:0kB kernel_stack:0kB pagetables:0kB unstable:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? yes
Nov 17 10:47:17 ceph1 kernel: [2810698.553753] lowmem_reserve[]: 0 1830 32011 32011 32011
Nov 17 10:47:17 ceph1 kernel: [2810698.553755] Node 0 DMA32 free:134848kB min:3860kB low:4824kB high:5788kB active_anon:120628kB inactive_anon:121792kB active_file:653404kB inactive_file:399272kB unevictable:0kB isolated(anon):0kB isolated(file):36kB present:1981184kB managed:1900752kB mlocked:0kB dirty:344kB writeback:0kB mapped:1200kB shmem:0kB slab_reclaimable:239900kB slab_unreclaimable:154560kB kernel_stack:43376kB pagetables:1176kB unstable:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
We check free Memory, Cache is free 24,705 MB
root@ceph1:/var/log# free -m
total used free shared buffers cached
Mem: 32052 31729 323 1 125 24256
-/+ buffers/cache: 7347 24705
Swap: 61033 120 60913
It's so weird. Could you help me solve this problem, I'm afraid it 'll come again.
Thanks in advance.
_______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
