[rabbitmq-discuss] Silent crashes, and "killed by ABRT signal"

carlhoerberg carl.hoerberg at gmail.com
Wed Dec 4 09:53:41 GMT 2013


On another server, with memory threshold 0.4 we just got: 

Dec  4 09:46:27 ip-10-34-235-83 kernel: [7494719.282354] TCP: Possible SYN
flooding on port 5672. Sending cookies.  Check SNMP counters.
Dec  4 09:47:39 ip-10-34-235-83 kernel: [7494791.746025] beam invoked
oom-killer: gfp_mask=0x201da, order=0, oom_adj=0, oom_score_adj=0
Dec  4 09:47:39 ip-10-34-235-83 kernel: [7494791.746032] beam cpuset=/
mems_allowed=0
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494791.746036] Pid: 8403, comm:
beam Not tainted 3.2.0-55-virtual #85-Ubuntu
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494791.746039] Call Trace:
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494791.746051] 
[<ffffffff81119e11>] dump_header+0x91/0xe0
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494791.746056] 
[<ffffffff8111a195>] oom_kill_process+0x85/0xb0
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494791.746060] 
[<ffffffff8111a53a>] out_of_memory+0xfa/0x220
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494791.746064] 
[<ffffffff8111ff13>] __alloc_pages_nodemask+0x8c3/0x8e0
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494791.746073] 
[<ffffffff81157046>] alloc_pages_current+0xb6/0x120
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494791.746079] 
[<ffffffff81116d37>] __page_cache_alloc+0xb7/0xd0
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494791.746083] 
[<ffffffff81118d02>] filemap_fault+0x212/0x3c0
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494791.746087] 
[<ffffffff811393e2>] __do_fault+0x72/0x550
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494791.746091] 
[<ffffffff8113ca9a>] handle_pte_fault+0xfa/0x200
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494791.746098] 
[<ffffffff810063ee>] ? xen_pmd_val+0xe/0x10
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494791.746102] 
[<ffffffff81005369>] ? __raw_callee_save_xen_pmd_val+0x11/0x1e
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494791.746106] 
[<ffffffff8113dd79>] handle_mm_fault+0x269/0x370
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494791.746111] 
[<ffffffff8100a58d>] ? xen_force_evtchn_callback+0xd/0x10
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494791.746119] 
[<ffffffff8165db04>] do_page_fault+0x184/0x550
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494791.746126] 
[<ffffffff811bb74c>] ? ep_poll+0x1cc/0x380
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494791.746131] 
[<ffffffff8103dd05>] ? pvclock_clocksource_read+0x55/0xf0
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494791.746136] 
[<ffffffff8165a735>] page_fault+0x25/0x30
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494791.746139] Mem-Info:
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494791.746141] Node 0 DMA per-cpu:
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494791.746145] CPU    0: hi:    0,
btch:   1 usd:   0
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494791.746147] Node 0 DMA32
per-cpu:
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494791.746150] CPU    0: hi:  186,
btch:  31 usd: 126
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494791.746155] active_anon:133427
inactive_anon:39 isolated_anon:0
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494791.746156]  active_file:9
inactive_file:37 isolated_file:0
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494791.746157]  unevictable:0
dirty:0 writeback:0 unstable:0
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494791.746158]  free:1373
slab_reclaimable:2875 slab_unreclaimable:5196
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494791.746160]  mapped:26 shmem:48
pagetables:717 bounce:0
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494791.746162] Node 0 DMA
free:2424kB min:72kB low:88kB high:108kB active_anon:9328kB
inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB
isolated(anon):0kB isolated(file):0kB present:14524kB mlocked:0kB dirty:0kB
writeback:0kB mapped:0kB shmem:0kB slab_reclaimable:844kB
slab_unreclaimable:2016kB kernel_stack:0kB pagetables:24kB unstable:0kB
bounce:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? yes
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494791.746174] lowmem_reserve[]: 0
597 597 597
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494791.746179] Node 0 DMA32
free:3068kB min:3088kB low:3860kB high:4632kB active_anon:524380kB
inactive_anon:156kB active_file:36kB inactive_file:148kB unevictable:0kB
isolated(anon):0kB isolated(file):0kB present:611856kB mlocked:0kB dirty:0kB
writeback:0kB mapped:104kB shmem:192kB slab_reclaimable:10656kB
slab_unreclaimable:18768kB kernel_stack:936kB pagetables:2844kB unstable:0kB
bounce:0kB writeback_tmp:0kB pages_scanned:1210 all_unreclaimable? yes
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494791.746191] lowmem_reserve[]: 0
0 0 0
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494791.746195] Node 0 DMA: 230*4kB
76*8kB 0*16kB 0*32kB 0*64kB 1*128kB 1*256kB 1*512kB 0*1024kB 0*2048kB
0*4096kB = 2424kB
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494791.746207] Node 0 DMA32:
751*4kB 6*8kB 1*16kB 0*32kB 0*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB
0*4096kB = 3068kB
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494791.746219] 106 total pagecache
pages
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494791.746221] 0 pages in swap
cache
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494791.746223] Swap cache stats:
add 0, delete 0, find 0/0
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494791.746225] Free swap  = 0kB
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494791.746227] Total swap = 0kB
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494791.748046] 159472 pages RAM
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494791.748047] 8388 pages reserved
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494791.748049] 148 pages shared
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494791.748051] 149339 pages
non-shared
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494791.748052] [ pid ]   uid  tgid
total_vm      rss cpu oom_adj oom_score_adj name
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494791.748061] [  264]     0   264    
4342       48   0       0             0 upstart-udev-br
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494791.748065] [  268]     0   268    
5368      110   0     -17         -1000 udevd
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494791.748069] [  353]     0   353    
5367      106   0     -17         -1000 udevd
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494791.748072] [  354]     0   354    
5367      105   0     -17         -1000 udevd
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494791.748076] [  420]     0   420    
3798       48   0       0             0 upstart-socket-
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494791.748079] [  641]   101   641   
63430      113   0       0             0 rsyslogd
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494791.748083] [  644]   102   644    
5981       90   0       0             0 dbus-daemon
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494791.748087] [  723]     0   723    
3234       43   0       0             0 getty
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494791.748091] [  728]     0   728    
3234       42   0       0             0 getty
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494791.748094] [  736]     0   736    
3234       42   0       0             0 getty
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494791.748098] [  739]     0   739    
3234       41   0       0             0 getty
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494791.748102] [  744]     0   744    
3234       40   0       0             0 getty
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494791.748105] [  754]     0   754    
1083       37   0       0             0 acpid
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494791.748108] [  755]     0   755    
4779       53   0       0             0 cron
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494791.748112] [  756]     0   756    
4228       40   0       0             0 atd
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494791.748116] [  771]   103   771   
46919      305   0       0             0 whoopsie
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494791.748119] [  788]     0   788    
3234       42   0       0             0 getty
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494791.748123] [ 1057]     0  1057    
1817      125   0       0             0 dhclient3
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494791.748126] [ 1076]     0  1076   
12509      152   0     -17         -1000 sshd
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494791.748131] [ 8056]   106  8056    
1855       46   0       0             0 epmd
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494791.748135] [ 8393]   106  8393    
1101       25   0       0             0 rabbitmq-server
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494791.748138] [ 8403]   106  8403  
307082   131187   0       0             0 beam
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494791.748142] [ 8507]   106  8507    
1846       21   0       0             0 inet_gethost
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494791.748145] [ 8508]   106  8508    
2371       33   0       0             0 inet_gethost
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494791.748172] Out of memory: Kill
process 8403 (beam) score 870 or sacrifice child
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494791.748189] Killed process 8507
(inet_gethost) total-vm:7384kB, anon-rss:84kB, file-rss:0kB
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494792.222260] rs:main Q:Reg
invoked oom-killer: gfp_mask=0x201da, order=0, oom_adj=0, oom_score_adj=0
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494792.222267] rs:main Q:Reg
cpuset=/ mems_allowed=0
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494792.222282] Pid: 648, comm:
rs:main Q:Reg Not tainted 3.2.0-55-virtual #85-Ubuntu
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494792.222285] Call Trace:
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494792.222297] 
[<ffffffff81119e11>] dump_header+0x91/0xe0
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494792.222301] 
[<ffffffff8111a195>] oom_kill_process+0x85/0xb0
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494792.222304] 
[<ffffffff8111a53a>] out_of_memory+0xfa/0x220
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494792.222309] 
[<ffffffff8111ff13>] __alloc_pages_nodemask+0x8c3/0x8e0
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494792.222318] 
[<ffffffff81157046>] alloc_pages_current+0xb6/0x120
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494792.222324] 
[<ffffffff81116d37>] __page_cache_alloc+0xb7/0xd0
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494792.222327] 
[<ffffffff81118d02>] filemap_fault+0x212/0x3c0
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494792.222332] 
[<ffffffff811393e2>] __do_fault+0x72/0x550
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494792.222336] 
[<ffffffff8113ca9a>] handle_pte_fault+0xfa/0x200
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494792.222343] 
[<ffffffff810063ee>] ? xen_pmd_val+0xe/0x10
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494792.222347] 
[<ffffffff81005369>] ? __raw_callee_save_xen_pmd_val+0x11/0x1e
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494792.222351] 
[<ffffffff8113dd79>] handle_mm_fault+0x269/0x370
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494792.222359] 
[<ffffffff8165db04>] do_page_fault+0x184/0x550
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494792.222365] 
[<ffffffff8103dd05>] ? pvclock_clocksource_read+0x55/0xf0
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494792.222370] 
[<ffffffff8100a810>] ? xen_clocksource_read+0x20/0x30
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494792.222374] 
[<ffffffff8100a8f9>] ? xen_clocksource_get_cycles+0x9/0x10
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494792.222380] 
[<ffffffff810948e7>] ? getnstimeofday+0x57/0xe0
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494792.222384] 
[<ffffffff8165a735>] page_fault+0x25/0x30
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494792.222387] Mem-Info:
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494792.222390] Node 0 DMA per-cpu:
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494792.222393] CPU    0: hi:    0,
btch:   1 usd:   0
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494792.222395] Node 0 DMA32
per-cpu:
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494792.222398] CPU    0: hi:  186,
btch:  31 usd: 121
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494792.222408] active_anon:133387
inactive_anon:39 isolated_anon:0
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494792.222409]  active_file:63
inactive_file:98 isolated_file:0
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494792.222410]  unevictable:0
dirty:0 writeback:0 unstable:0
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494792.222411]  free:1353
slab_reclaimable:2875 slab_unreclaimable:5193
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494792.222412]  mapped:67 shmem:48
pagetables:698 bounce:0
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494792.222415] Node 0 DMA
free:2424kB min:72kB low:88kB high:108kB active_anon:9328kB
inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB
isolated(anon):0kB isolated(file):0kB present:14524kB mlocked:0kB dirty:0kB
writeback:0kB mapped:0kB shmem:0kB slab_reclaimable:844kB
slab_unreclaimable:2016kB kernel_stack:0kB pagetables:24kB unstable:0kB
bounce:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? yes
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494792.222427] lowmem_reserve[]: 0
597 597 597
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494792.222432] Node 0 DMA32
free:2988kB min:3088kB low:3860kB high:4632kB active_anon:524220kB
inactive_anon:156kB active_file:252kB inactive_file:392kB unevictable:0kB
isolated(anon):0kB isolated(file):0kB present:611856kB mlocked:0kB dirty:0kB
writeback:0kB mapped:268kB shmem:192kB slab_reclaimable:10656kB
slab_unreclaimable:18756kB kernel_stack:928kB pagetables:2768kB unstable:0kB
bounce:0kB writeback_tmp:0kB pages_scanned:1367 all_unreclaimable? yes
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494792.222451] lowmem_reserve[]: 0
0 0 0
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494792.222456] Node 0 DMA: 230*4kB
76*8kB 0*16kB 0*32kB 0*64kB 1*128kB 1*256kB 1*512kB 0*1024kB 0*2048kB
0*4096kB = 2424kB
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494792.222468] Node 0 DMA32:
727*4kB 8*8kB 1*16kB 0*32kB 0*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB
0*4096kB = 2988kB
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494792.222480] 205 total pagecache
pages
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494792.222482] 0 pages in swap
cache
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494792.222484] Swap cache stats:
add 0, delete 0, find 0/0
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494792.222486] Free swap  = 0kB
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494792.222488] Total swap = 0kB
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494792.224375] 159472 pages RAM
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494792.224377] 8388 pages reserved
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494792.224379] 184 pages shared
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494792.224380] 149331 pages
non-shared
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494792.224382] [ pid ]   uid  tgid
total_vm      rss cpu oom_adj oom_score_adj name
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494792.224388] [  264]     0   264    
4342       48   0       0             0 upstart-udev-br
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494792.224393] [  268]     0   268    
5368      110   0     -17         -1000 udevd
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494792.224396] [  353]     0   353    
5367      106   0     -17         -1000 udevd
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494792.224400] [  354]     0   354    
5367      105   0     -17         -1000 udevd
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494792.224404] [  420]     0   420    
3798       48   0       0             0 upstart-socket-
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494792.224407] [  641]   101   641   
63430      147   0       0             0 rsyslogd
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494792.224411] [  644]   102   644    
5981       90   0       0             0 dbus-daemon
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494792.224414] [  723]     0   723    
3234       43   0       0             0 getty
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494792.224418] [  728]     0   728    
3234       42   0       0             0 getty
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494792.224421] [  736]     0   736    
3234       42   0       0             0 getty
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494792.224425] [  739]     0   739    
3234       41   0       0             0 getty
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494792.224428] [  744]     0   744    
3234       40   0       0             0 getty
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494792.224431] [  754]     0   754    
1083       37   0       0             0 acpid
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494792.224435] [  755]     0   755    
4779       53   0       0             0 cron
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494792.224438] [  756]     0   756    
4228       40   0       0             0 atd
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494792.224442] [  771]   103   771   
46919      305   0       0             0 whoopsie
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494792.224445] [  788]     0   788    
3234       42   0       0             0 getty
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494792.224449] [ 1057]     0  1057    
1817      125   0       0             0 dhclient3
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494792.224452] [ 1076]     0  1076   
12509      152   0     -17         -1000 sshd
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494792.224457] [ 8056]   106  8056    
1855       46   0       0             0 epmd
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494792.224460] [ 8393]   106  8393    
1101       25   0       0             0 rabbitmq-server
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494792.224464] [ 8403]   106  8403  
307082   131187   0       0             0 beam
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494792.224468] Out of memory: Kill
process 8403 (beam) score 870 or sacrifice child
Dec  4 09:47:40 ip-10-34-235-83 kernel: [7494792.224485] Killed process 8403
(beam) total-vm:1228328kB, anon-rss:524748kB, file-rss:0kB
Dec  4 09:49:22 ip-10-34-235-83 kernel: [7494894.351834] TCP: Possible SYN
flooding on port 5672. Sending cookies.  Check SNMP counters.



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