Public bug reported:
Binary package hint: apache2
After upgrading my web server from Ubuntu Gutsy to Hardy, I couldn't get
Apache 2 working correctly. I thought at first, that I was experiencing
this bug : #224945 . But this one deals with memory leaks when mod_ssl
is enabled. So, because I'm not using it on apache, I've decided to
unload it. But it hasn't changed a thing. I've also updated my apache's
version to get the latest, with the bug fixed. Nothing has changed so
far...
My problem is, after approximately four hours of execution, apache is
overloading and taking all the memory and the swap so that my system
produces an Out of memory error which wants to kill apache2 but doesn't
succeed, which leads to a system crash. The weird thing is that the OOM
error sometimes tries to kill other processes...
Here's a dump from /var/log/syslog when an OOM happens :
May 3 19:12:15 yoda kernel: [ 8267.512850] Out of memory: kill process 7986
(apache2) score 19064 or a child
May 3 19:12:15 yoda kernel: [ 8267.513008] Killed process 7986 (apache2)
May 3 19:12:15 yoda kernel: [ 8271.323940] apache2 invoked oom-killer:
gfp_mask=0x1201d2, order=0, oomkilladj=0
May 3 19:12:15 yoda kernel: [ 8271.323974] Pid: 8012, comm: apache2 Not
tainted 2.6.24-16-server #1
May 3 19:12:15 yoda kernel: [ 8271.324051] [oom_kill_process+0x10a/0x120]
oom_kill_process+0x10a/0x120
May 3 19:12:15 yoda kernel: [ 8271.324136] [out_of_memory+0x167/0x1a0]
out_of_memory+0x167/0x1a0
May 3 19:12:15 yoda kernel: [ 8271.324186]
[agpgart:__alloc_pages+0x34c/0x380] __alloc_pages+0x34c/0x380
May 3 19:12:15 yoda kernel: [ 8271.324248]
[__do_page_cache_readahead+0x11d/0x240] __do_page_cache_readahead+0x11d/0x240
May 3 19:12:15 yoda kernel: [ 8271.324314]
[do_page_cache_readahead+0x4c/0x70] do_page_cache_readahead+0x4c/0x70
May 3 19:12:15 yoda kernel: [ 8271.324344] [filemap_fault+0x2f2/0x420]
filemap_fault+0x2f2/0x420
May 3 19:12:15 yoda kernel: [ 8271.324408] [__do_fault+0x83/0x4c0]
__do_fault+0x83/0x4c0
May 3 19:12:15 yoda kernel: [ 8271.324437] [libata:kunmap_atomic+0x2d/0x2e90]
kunmap_atomic+0x2d/0x80
May 3 19:12:15 yoda kernel: [ 8271.324480] [do_wp_page+0x460/0x650]
do_wp_page+0x460/0x650
May 3 19:12:15 yoda kernel: [ 8271.324510] [deadline_move_request+0x59/0x70]
deadline_move_request+0x59/0x70
May 3 19:12:15 yoda kernel: [ 8271.324527] [elv_dispatch_add_tail+0x1c/0x60]
elv_dispatch_add_tail+0x1c/0x60
May 3 19:12:15 yoda kernel: [ 8271.324590] [handle_mm_fault+0x21b/0xb80]
handle_mm_fault+0x21b/0xb80
May 3 19:12:15 yoda kernel: [ 8271.324697] [sched_clock+0x13/0x30]
sched_clock+0x13/0x30
May 3 19:12:15 yoda kernel: [ 8271.324771] [do_page_fault+0x143/0x900]
do_page_fault+0x143/0x900
May 3 19:12:15 yoda kernel: [ 8271.324797] [__do_softirq+0x82/0x110]
__do_softirq+0x82/0x110
May 3 19:12:15 yoda kernel: [ 8271.324864] [do_page_fault+0x0/0x900]
do_page_fault+0x0/0x900
May 3 19:12:15 yoda kernel: [ 8271.324881] [error_code+0x72/0x78]
error_code+0x72/0x78
May 3 19:12:15 yoda kernel: [ 8271.324920] [unix_create1+0x50/0x120]
unix_create1+0x50/0x120
May 3 19:12:15 yoda kernel: [ 8271.324971] =======================
May 3 19:12:15 yoda kernel: [ 8271.324979] Mem-info:
May 3 19:12:15 yoda kernel: [ 8271.324986] DMA per-cpu:
May 3 19:12:15 yoda kernel: [ 8271.324996] CPU 0: Hot: hi: 0, btch: 1
usd: 0 Cold: hi: 0, btch: 1 usd: 0
May 3 19:12:15 yoda kernel: [ 8271.325008] Normal per-cpu:
May 3 19:12:15 yoda kernel: [ 8271.325018] CPU 0: Hot: hi: 186, btch: 31
usd: 143 Cold: hi: 62, btch: 15 usd: 52
May 3 19:12:15 yoda kernel: [ 8271.325035] Active:86718 inactive:10 dirty:0
writeback:0 unstable:0
May 3 19:12:15 yoda kernel: [ 8271.325042] free:981 slab:3338 mapped:1
pagetables:1909 bounce:0
May 3 19:12:15 yoda kernel: [ 8271.325058] DMA free:1556kB min:104kB low:128kB
high:156kB active:10512kB inactive:0kB present:16256kB pages_scanned:52482
all_unreclaimable? yes
May 3 19:12:15 yoda kernel: [ 8271.325071] lowmem_reserve[]: 0 364 364 364
May 3 19:12:15 yoda kernel: [ 8271.325090] Normal free:2368kB min:2384kB
low:2980kB high:3576kB active:336360kB inactive:40kB present:372812kB
pages_scanned:540939 all_unreclaimable? yes
May 3 19:12:15 yoda kernel: [ 8271.325104] lowmem_reserve[]: 0 0 0 0
May 3 19:12:15 yoda kernel: [ 8271.325116] DMA: 1*4kB 0*8kB 1*16kB 0*32kB
0*64kB 0*128kB 0*256kB 1*512kB 1*1024kB 0*2048kB 0*4096kB = 1556kB
May 3 19:12:15 yoda kernel: [ 8271.325148] Normal: 31*4kB 0*8kB 0*16kB 0*32kB
1*64kB 1*128kB 2*256kB 1*512kB 1*1024kB 0*2048kB 0*4096kB = 2364kB
May 3 19:12:15 yoda kernel: [ 8271.325184] Swap cache: add 0, delete 0, find
0/0, race 0+0
May 3 19:12:15 yoda kernel: [ 8271.325192] Free swap = 0kB
May 3 19:12:15 yoda kernel: [ 8271.325200] Total swap = 0kB
May 3 19:12:15 yoda kernel: [ 8271.325206] Free swap: 0kB
May 3 19:12:15 yoda kernel: [ 8271.352327] 98032 pages of RAM
May 3 19:12:15 yoda kernel: [ 8271.352343] 0 pages of HIGHMEM
May 3 19:12:15 yoda kernel: [ 8271.352349] 1953 reserved pages
May 3 19:12:15 yoda kernel: [ 8271.352355] 349943 pages shared
May 3 19:12:15 yoda kernel: [ 8271.352361] 0 pages swap cached
May 3 19:12:15 yoda kernel: [ 8271.352367] 0 pages dirty
May 3 19:12:15 yoda kernel: [ 8271.352373] 0 pages writeback
May 3 19:12:15 yoda kernel: [ 8271.352378] 1 pages mapped
May 3 19:12:15 yoda kernel: [ 8271.352384] 3338 pages slab
May 3 19:12:15 yoda kernel: [ 8271.352390] 1909 pages pagetables
I can't tell you how to reproduce this bug because I don't know it yet,
but I'm pretty sure it's an apache problem (or related with apache)
because when it's not launched, this problem doesn't happen.
I'm using Ubuntu Hardy Heron (8.04 LTS) Server with Apache 2.2.8-1 (it's
the same with 2.2.8-4 by the way), libapache2-mod-php5 (5.2.4-5), MySQL
(5.0.51a).
Thank you for helping
PS : Sorry for my English, I'm French...
** Affects: apache2 (Ubuntu)
Importance: Undecided
Status: New
--
Apache 2 produces an OOM after 4 hours using
https://bugs.launchpad.net/bugs/230878
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