<div dir="ltr">Hi,<div><br></div><div>In one of my node glustershd process is killed due to OOM and this happened only in one node out of 40 node cluster.</div><div><br></div><div>Node running on Ubuntu 16.04.2.</div><div><br></div><div>dmesg output:</div><div><br></div><div><div>[Mon Apr 24 17:21:38 2017] nrpe invoked oom-killer: gfp_mask=0x26000c0, order=2, oom_score_adj=0</div><div>[Mon Apr 24 17:21:38 2017] nrpe cpuset=/ mems_allowed=0</div><div>[Mon Apr 24 17:21:38 2017] CPU: 0 PID: 12626 Comm: nrpe Not tainted 4.4.0-62-generic #83-Ubuntu</div><div>[Mon Apr 24 17:21:38 2017]  0000000000000286 00000000fc26b170 ffff88048bf27af0 ffffffff813f7c63<br></div><div>[Mon Apr 24 17:21:38 2017]  ffff88048bf27cc8 ffff88082a663c00 ffff88048bf27b60 ffffffff8120ad4e</div><div>[Mon Apr 24 17:21:38 2017]  ffff88087781a870 ffff88087781a860 ffffea0011285a80 0000000100000001</div><div>[Mon Apr 24 17:21:38 2017] Call Trace:</div><div>[Mon Apr 24 17:21:38 2017]  [<ffffffff813f7c63>] dump_stack+0x63/0x90</div><div>[Mon Apr 24 17:21:38 2017]  [<ffffffff8120ad4e>] dump_header+0x5a/0x1c5</div><div>[Mon Apr 24 17:21:38 2017]  [<ffffffff811926c2>] oom_kill_process+0x202/0x3c0</div><div>[Mon Apr 24 17:21:38 2017]  [<ffffffff81192ae9>] out_of_memory+0x219/0x460</div><div>[Mon Apr 24 17:21:38 2017]  [<ffffffff81198a5d>] __alloc_pages_slowpath.constprop.88+0x8fd/0xa70</div><div>[Mon Apr 24 17:21:38 2017]  [<ffffffff81198e56>] __alloc_pages_nodemask+0x286/0x2a0</div><div>[Mon Apr 24 17:21:38 2017]  [<ffffffff81198f0b>] alloc_kmem_pages_node+0x4b/0xc0</div><div>[Mon Apr 24 17:21:38 2017]  [<ffffffff8107ea5e>] copy_process+0x1be/0x1b70</div><div>[Mon Apr 24 17:21:38 2017]  [<ffffffff8122d013>] ? __fd_install+0x33/0xe0</div><div>[Mon Apr 24 17:21:38 2017]  [<ffffffff81713d01>] ? release_sock+0x111/0x160</div><div>[Mon Apr 24 17:21:38 2017]  [<ffffffff810805a0>] _do_fork+0x80/0x360</div><div>[Mon Apr 24 17:21:38 2017]  [<ffffffff8122429c>] ? SyS_select+0xcc/0x110</div><div>[Mon Apr 24 17:21:38 2017]  [<ffffffff81080929>] SyS_clone+0x19/0x20</div><div>[Mon Apr 24 17:21:38 2017]  [<ffffffff818385f2>] entry_SYSCALL_64_fastpath+0x16/0x71</div><div>[Mon Apr 24 17:21:38 2017] Mem-Info:</div><div>[Mon Apr 24 17:21:38 2017] active_anon:553952 inactive_anon:206987 isolated_anon:0</div><div>              active_file:3410764 inactive_file:3460179 isolated_file:0</div><div>              unevictable:4914 dirty:212868 writeback:0 unstable:0</div><div>              slab_reclaimable:386621 slab_unreclaimable:31829</div><div>              mapped:6112 shmem:211 pagetables:6178 bounce:0</div><div>              free:82623 free_pcp:213 free_cma:0</div><div>[Mon Apr 24 17:21:38 2017] Node 0 DMA free:15880kB min:32kB low:40kB high:48kB active_anon:0kB inactive_anon:0k</div><div>B active_file:0kB inactive_file:0kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:15964kB manag</div><div>ed:15880kB mlocked:0kB dirty:0kB writeback:0kB mapped:0kB shmem:0kB slab_reclaimable:0kB slab_unreclaimable:0kB</div><div> kernel_stack:0kB pagetables:0kB unstable:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB writeback_tmp:</div><div>0kB pages_scanned:0 all_unreclaimable? yes</div><div>[Mon Apr 24 17:21:38 2017] lowmem_reserve[]: 0 1868 31944 31944 31944</div><div>[Mon Apr 24 17:21:38 2017] Node 0 DMA32 free:133096kB min:3948kB low:4932kB high:5920kB active_anon:170764kB in</div><div>active_anon:206296kB active_file:394236kB inactive_file:525288kB unevictable:980kB isolated(anon):0kB isolated(</div><div>file):0kB present:2033596kB managed:1952976kB mlocked:980kB dirty:1552kB writeback:0kB mapped:3904kB shmem:724k</div><div>B slab_reclaimable:502176kB slab_unreclaimable:8916kB kernel_stack:1952kB pagetables:1408kB unstable:0kB bounce</div><div>:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no</div><div>[Mon Apr 24 17:21:38 2017] lowmem_reserve[]: 0 0 30076 30076 30076</div><div>[Mon Apr 24 17:21:38 2017] Node 0 Normal free:181516kB min:63600kB low:79500kB high:95400kB active_anon:2045044</div><div>kB inactive_anon:621652kB active_file:13248820kB inactive_file:13315428kB unevictable:18676kB isolated(anon):0kB isolated(file):0kB present:31322112kB managed:30798036kB mlocked:18676kB dirty:849920kB writeback:0kB mapped:20544kB shmem:120kB slab_reclaimable:1044308kB slab_unreclaimable:118400kB kernel_stack:33792kB pagetables:23304kB unstable:0kB bounce:0kB free_pcp:852kB local_pcp:0kB free_cma:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no</div><div>[Mon Apr 24 17:21:38 2017] lowmem_reserve[]: 0 0 0 0 0</div><div>[Mon Apr 24 17:21:38 2017] Node 0 DMA: 0*4kB 1*8kB (U) 0*16kB 0*32kB 2*64kB (U) 1*128kB (U) 1*256kB (U) 0*512kB</div><div> 1*1024kB (U) 1*2048kB (M) 3*4096kB (M) = 15880kB</div><div>[Mon Apr 24 17:21:38 2017] Node 0 DMA32: 18416*4kB (UME) 7480*8kB (UME) 0*16kB 0*32kB 0*64kB 0*128kB 0*256kB 0*</div><div>512kB 0*1024kB 0*2048kB 0*4096kB = 133504kB</div><div>[Mon Apr 24 17:21:38 2017] Node 0 Normal: 44972*4kB (UMEH) 13*8kB (EH) 13*16kB (H) 13*32kB (H) 8*64kB (H) 2*128</div><div>kB (H) 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 181384kB</div><div>[Mon Apr 24 17:21:38 2017] Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=1048576kB</div><div>[Mon Apr 24 17:21:38 2017] Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=2048kB</div><div>[Mon Apr 24 17:21:38 2017] 6878703 total pagecache pages</div><div>[Mon Apr 24 17:21:38 2017] 2484 pages in swap cache</div><div>[Mon Apr 24 17:21:38 2017] Swap cache stats: add 3533870, delete 3531386, find 3743168/4627884</div><div>[Mon Apr 24 17:21:38 2017] Free swap  = 14976740kB</div><div>[Mon Apr 24 17:21:38 2017] Total swap = 15623164kB</div><div>[Mon Apr 24 17:21:38 2017] 8342918 pages RAM</div><div>[Mon Apr 24 17:21:38 2017] 0 pages HighMem/MovableOnly</div><div>[Mon Apr 24 17:21:38 2017] 151195 pages reserved</div><div>[Mon Apr 24 17:21:38 2017] 0 pages cma reserved</div><div>[Mon Apr 24 17:21:38 2017] 0 pages hwpoisoned</div><div>[Mon Apr 24 17:21:38 2017] [ pid ]  uid  tgid total_vm    rss nr_ptes nr_pmds swapents oom_score_adj name</div><div>[Mon Apr 24 17:21:38 2017] [  566]   0  566   15064    460    33    3   1108       0 systemd</div><div>-journal</div><div>[Mon Apr 24 17:21:38 2017] [  602]   0  602   23693    182    16    3     0       0 lvmetad</div><div>[Mon Apr 24 17:21:38 2017] [  613]   0  613   11241    589    21    3    264     -1000 systemd</div><div>-udevd</div><div>[Mon Apr 24 17:21:38 2017] [ 1381]  100  1381   25081    440    19    3    25       0 systemd</div><div>-timesyn</div><div>[Mon Apr 24 17:21:38 2017] [ 1447]   0  1447   1100    307    7    3     0       0 acpid</div><div>[Mon Apr 24 17:21:38 2017] [ 1449]   0  1449   7252    374    21    3    47       0 cron</div><div><br></div><div>[Mon Apr 24 17:21:38 2017] [ 1451]   0  1451   77253    994    19    3    10       0 lxcfs</div><div>[Mon Apr 24 17:21:38 2017] [ 1483]   0  1483   6511    413    18    3    42       0 atd</div><div>[Mon Apr 24 17:21:38 2017] [ 1505]   0  1505   7157    286    18    3    36       0 systemd</div><div>-logind</div><div>[Mon Apr 24 17:21:38 2017] [ 1508]  104  1508   64099    376    27    4    712       0 rsyslog</div><div>d</div><div>[Mon Apr 24 17:21:38 2017] [ 1510]  107  1510   10723    497    25    3    45      -900 dbus-da</div><div>emon</div><div>[Mon Apr 24 17:21:38 2017] [ 1521]   0  1521   68970    178    38    3    170       0 account</div><div>s-daemon</div><div>[Mon Apr 24 17:21:38 2017] [ 1526]   0  1526   6548    785    16    3    63       0 smartd</div><div>[Mon Apr 24 17:21:38 2017] [ 1528]   0  1528   54412    146    31    5   1806       0 snapd</div><div>[Mon Apr 24 17:21:38 2017] [ 1578]   0  1578   3416    335    11    3    24       0 mdadm</div><div>[Mon Apr 24 17:21:38 2017] [ 1595]   0  1595   16380    470    35    3    157     -1000 sshd</div><div>[Mon Apr 24 17:21:38 2017] [ 1610]   0  1610   69295    303    40    4    57       0 polkitd</div><div>[Mon Apr 24 17:21:38 2017] [ 1618]   0  1618   1306    31    8    3     0       0 iscsid</div><div>[Mon Apr 24 17:21:38 2017] [ 1619]   0  1619   1431    877    8    3     0      -17 iscsid</div><div>[Mon Apr 24 17:21:38 2017] [ 1624]   0  1624  126363   8027   122    4   22441       0 gluster</div><div>d</div><div>[Mon Apr 24 17:21:38 2017] [ 1688]   0  1688   4884    430    15    3    46       0 irqbala</div><div>nce</div><div>[Mon Apr 24 17:21:38 2017] [ 1699]   0  1699   3985    348    13    3     0       0 agetty</div><div>[Mon Apr 24 17:21:38 2017] [ 7001]   0  7001  500631   27874   145    5   3356       0 gluster</div><div>fsd</div><div>[Mon Apr 24 17:21:38 2017] [ 8136]   0  8136  500631   28760   141    5   2390       0 gluster</div><div>fsd</div><div>[Mon Apr 24 17:21:38 2017] [ 9280]   0  9280  533529   27752   135    5   3200       0 gluster</div><div>fsd</div><div>[Mon Apr 24 17:21:38 2017] [12626]  111 12626   5991    420    16    3    113       0 nrpe</div><div>[Mon Apr 24 17:21:38 2017] [14342]   0 14342  533529   28377   135    5   2176       0 gluster</div><div>fsd</div><div>[Mon Apr 24 17:21:38 2017] [14361]   0 14361  534063   29190   136    5   1972       0 gluster</div><div>fsd</div><div><br></div><div>[Mon Apr 24 17:21:38 2017] [14380]   0 14380  533529   28104   136    6   2437       0 glusterfsd</div><div>[Mon Apr 24 17:21:38 2017] [14399]   0 14399  533529   27552   131    5   2808       0 glusterfsd</div><div>[Mon Apr 24 17:21:38 2017] [14418]   0 14418  533529   29588   138    5   2697       0 glusterfsd</div><div>[Mon Apr 24 17:21:38 2017] [14437]   0 14437  517080   28671   146    5   2170       0 glusterfsd</div><div>[Mon Apr 24 17:21:38 2017] [14456]   0 14456  533529   28083   139    5   3359       0 glusterfsd</div><div>[Mon Apr 24 17:21:38 2017] [14475]   0 14475  533529   28054   134    5   2954       0 glusterfsd</div><div>[Mon Apr 24 17:21:38 2017] [14494]   0 14494  533529   28594   135    5   2311       0 glusterfsd</div><div>[Mon Apr 24 17:21:38 2017] [14513]   0 14513  533529   28911   138    5   2833       0 glusterfsd</div><div>[Mon Apr 24 17:21:38 2017] [14532]   0 14532  533529   28259   134    6   3145       0 glusterfsd</div><div>[Mon Apr 24 17:21:38 2017] [14551]   0 14551  533529   27875   138    5   2267       0 glusterfsd</div><div>[Mon Apr 24 17:21:38 2017] [14570]   0 14570  484716   28247   142    5   2875       0 glusterfsd</div><div>[Mon Apr 24 17:21:38 2017] [27646]   0 27646  3697561  202086   2830    17   16528       0 glusterfs</div><div>[Mon Apr 24 17:21:38 2017] [27655]   0 27655  787371   29588   197    6   25472       0 glusterfs</div><div>[Mon Apr 24 17:21:38 2017] [27665]   0 27665  689585    605   108    6   7008       0 glusterfs</div><div>[Mon Apr 24 17:21:38 2017] [29878]   0 29878  193833   36054   241    4   41182       0 glusterfs</div><div>[Mon Apr 24 17:21:38 2017] Out of memory: Kill process 27646 (glusterfs) score 17 or sacrifice child</div><div>[Mon Apr 24 17:21:38 2017] Killed process 27646 (glusterfs) total-vm:14790244kB, anon-rss:795040kB, file-rss:13304kB</div></div><div><br></div><div><div>/var/log/glusterfs/glusterd.log</div><div>[2017-04-24 11:53:51.359603] I [MSGID: 106006] [glusterd-svc-mgmt.c:327:glusterd_svc_common_rpc_notify] 0-management: glustershd has disconnected from glusterd.</div></div><div><br></div><div>what would have gone wrong?</div><div><br></div><div>regards</div><div>Amudhan</div><div><br></div></div>