[owncloud-devel] php-fpm hanging: segfault, SIGSEGV - CPUs 100%

Martin crysman Zahradník crysman at seznam.cz
Thu Jul 21 15:03:11 GMT 2016


It's working now.

We've made:
- some minor updates to PHP
- minor updates in system libraries and OS itself
- minor Owncloud update (to 8.2.7 from 8.2.5)

...just to let you know. Thanx #McZ

 
/Martin crysman Zahradník/
/www:/ crysmanovo.blogspot.com <http://crysmanovo.blogspot.com>
/e-mail:/ crysman at seznam.cz
/jabber:/ crysman at jabber.org
/Google talk/hangout:/ crysmanovo at gmail.com
/facebook:/ no way!
/Skype:/ no way! using Ekiga - SIP:crysman at ekiga.net
running GNU/Linux Xubuntu
Jak kupovat zodpovědně vejce (nejen) o Velikonocích?
<http://crysmanovo.blogspot.com/2016/03/jak-kupovat-zodpovedne-vejce-nejen-o.html>
On 21.7.2016 14:19, Frank de Lange wrote:
> On Thu, 21 Jul 2016 13:39:40 +0200
> Martin crysman Zahradník <crysman at seznam.cz> wrote:
>
>> Hello,
>>
>> today owncloud webserver got too slow to even log-in. I did SSH and
>> checked htop (top) - 100% CPU, load average around 23 (!)
>>
>> OK, that is bad.
>>
>> So I checked some log files and found this:
>>
>> ⚡ cat /var/log/messages | grep -i err | tail
>> Jul 21 13:28:32 cloud kernel: [ 5035.723242] php5-fpm[16002]: segfault
>> at 7fff795caed8 ip 0000000000690b2a sp 00007fff795cae90 error 6 in
>> php5-fpm[400000+85c000]
>> Jul 21 13:28:45 cloud kernel: [ 5048.958776] php5-fpm[16032]: segfault
>> at 7fff795caed8 ip 0000000000690b2a sp 00007fff795cae90 error 6 in
>> php5-fpm[400000+85c000]
>> Jul 21 13:28:47 cloud kernel: [ 5050.946225] php5-fpm[16033]: segfault
>> at 7fff795caed8 ip 0000000000690b2a sp 00007fff795cae90 error 6 in
>> php5-fpm[400000+85c000]
>> Jul 21 13:28:51 cloud kernel: [ 5055.286449] php5-fpm[16034]: segfault
>> at 7fff795caed8 ip 0000000000690b2a sp 00007fff795cae90 error 6 in
>> php5-fpm[400000+85c000]
>> Jul 21 13:28:56 cloud kernel: [ 5059.719135] php5-fpm[16062]: segfault
>> at 7fff795caed8 ip 0000000000690b2a sp 00007fff795cae90 error 6 in
>> php5-fpm[400000+85c000]
>> Jul 21 13:29:09 cloud kernel: [ 5073.420829] php5-fpm[16102]: segfault
>> at 7fff795caed8 ip 0000000000690b2a sp 00007fff795cae90 error 6 in
>> php5-fpm[400000+85c000]
>> Jul 21 13:29:15 cloud kernel: [ 5079.317363] php5-fpm[16114]: segfault
>> at 7fff795caed8 ip 0000000000690b2a sp 00007fff795cae90 error 6 in
>> php5-fpm[400000+85c000]
>> Jul 21 13:29:24 cloud kernel: [ 5087.786983] php5-fpm[16145]: segfault
>> at 7fff795caed8 ip 0000000000690b2a sp 00007fff795cae90 error 6 in
>> php5-fpm[400000+85c000]
>> Jul 21 13:29:28 cloud kernel: [ 5091.781061] php5-fpm[16144]: segfault
>> at 7fff795caed8 ip 0000000000690b2a sp 00007fff795cae90 error 6 in
>> php5-fpm[400000+85c000]
>> Jul 21 13:29:28 cloud kernel: [ 5091.867168] php5-fpm[16146]: segfault
>> at 7fff795caed8 ip 0000000000690b2a sp 00007fff795cae90 error 6 in
>> php5-fpm[400000+85c000]
>>
>>
>> And this:
>> ⚡ cat /var/log/php5-fpm.log | grep -i warn | tail
>> [21-Jul-2016 13:30:19] WARNING: [pool owncloud.somedomain.here] child
>> 16267 exited on signal 11 (SIGSEGV) after 174.181309 seconds from
>> start [21-Jul-2016 13:30:19] WARNING: [pool owncloud.somedomain.here]
>> child 16261 exited on signal 11 (SIGSEGV) after 175.186522 seconds
>> from start [21-Jul-2016 13:30:20] WARNING: [pool
>> owncloud.somedomain.here] child 16266 exited on signal 11 (SIGSEGV)
>> after 175.229058 seconds from start [21-Jul-2016 13:30:43] WARNING:
>> [pool owncloud.somedomain.here] child 16303 exited on signal 11
>> (SIGSEGV) after 177.555848 seconds from start [21-Jul-2016 13:31:04]
>> WARNING: [pool owncloud.somedomain.here] child 16383 exited on signal
>> 11 (SIGSEGV) after 175.119034 seconds from start [21-Jul-2016
>> 13:31:05] WARNING: [pool owncloud.somedomain.here] child 16377 exited
>> on signal 11 (SIGSEGV) after 179.319993 seconds from start
>> [21-Jul-2016 13:31:09] WARNING: [pool owncloud.somedomain.here] child
>> 16384 exited on signal 11 (SIGSEGV) after 173.453260 seconds from
>> start [21-Jul-2016 13:31:11] WARNING: [pool owncloud.somedomain.here]
>> child 16385 exited on signal 11 (SIGSEGV) after 173.200730 seconds
>> from start [21-Jul-2016 13:31:15] WARNING: [pool
>> owncloud.somedomain.here] child 16428 exited on signal 11 (SIGSEGV)
>> after 168.492796 seconds from start [21-Jul-2016 13:31:17] WARNING:
>> [pool owncloud.somedomain.here] child 16426 exited on signal 11
>> (SIGSEGV) after 171.079030 seconds from start
>>
>>
>> And this:
>> [21-Jul-2016 13:28:56] WARNING: [pool owncloud.somedomain.here] child
>> 16062 exited on signal 11 (SIGSEGV) after 173.474043 seconds from
>> start [21-Jul-2016 13:29:09] WARNING: [pool owncloud.somedomain.here]
>> child 16102 exited on signal 11 (SIGSEGV) after 171.912835 seconds
>> from start [21-Jul-2016 13:29:15] WARNING: [pool
>> owncloud.somedomain.here] child 16114 exited on signal 11 (SIGSEGV)
>> after 173.574837 seconds from start [21-Jul-2016 13:29:24] WARNING:
>> [pool owncloud.somedomain.here] child 16145 exited on signal 11
>> (SIGSEGV) after 171.567673 seconds from start [21-Jul-2016 13:29:28]
>> WARNING: [pool owncloud.somedomain.here] child 16144 exited on signal
>> 11 (SIGSEGV) after 175.886644 seconds from start [21-Jul-2016
>> 13:29:28] WARNING: [pool owncloud.somedomain.here] child 16146 exited
>> on signal 11 (SIGSEGV) after 175.222437 seconds from start
>> [21-Jul-2016 13:30:19] WARNING: [pool owncloud.somedomain.here] child
>> 16267 exited on signal 11 (SIGSEGV) after 174.181309 seconds from
>> start [21-Jul-2016 13:30:19] WARNING: [pool owncloud.somedomain.here]
>> child 16261 exited on signal 11 (SIGSEGV) after 175.186522 seconds
>> from start [21-Jul-2016 13:30:20] WARNING: [pool
>> owncloud.somedomain.here] child 16266 exited on signal 11 (SIGSEGV)
>> after 175.229058 seconds from start [21-Jul-2016 13:30:43] WARNING:
>> [pool owncloud.somedomain.here] child 16303 exited on signal 11
>> (SIGSEGV) after 177.555848 seconds from start
>>
>> Here is top output:
>>   PID USER      PR  NI  VIRT  RES  SHR S  %CPU %MEM    TIME+ 
>> COMMAND                                                                                                                         
>>
>>  3356 mysql     20   0 4589m 357m  15m S  93,6 14,9  54:31.44
>> mysqld                                                                                                                          
>>
>> 16884 owncloud  10 -10  375m  37m  25m S  24,9  1,6   0:00.75
>> php5-fpm                                                                                                                        
>>
>> 16732 owncloud  10 -10  390m  51m  24m S  16,9  2,2   0:10.47
>> php5-fpm                                                                                                                        
>>
>> 16618 owncloud  10 -10  400m  62m  25m S  16,3  2,6   0:17.30
>> php5-fpm                                                                                                                        
>>
>> 16742 owncloud  10 -10  391m  56m  30m S  15,9  2,4   0:09.20
>> php5-fpm                                                                                                                        
>>
>> 16616 owncloud  10 -10  402m  67m  30m R  15,6  2,8   0:17.17
>> php5-fpm                                                                                                                        
>>
>> 16543 owncloud  10 -10  410m  71m  24m S  15,3  3,0   0:25.70
>> php5-fpm                                                                                                                        
>>
>> 16617 owncloud  10 -10  399m  62m  25m S  14,6  2,6   0:17.61
>> php5-fpm                                                                                                                        
>>
>> 16672 owncloud  10 -10  395m  56m  24m S  14,3  2,3   0:13.62
>> php5-fpm                                                                                                                        
>>
>> 16733 owncloud  10 -10  390m  51m  24m S  14,3  2,2   0:10.24
>> php5-fpm                                                                                                                        
>>
>> 16879 owncloud  10 -10  377m  38m  24m S  14,3  1,6   0:01.59
>> php5-fpm                                                                                                                        
>>
>> 16790 owncloud  10 -10  383m  45m  25m S  13,9  1,9   0:06.02
>> php5-fpm                                                                                                                        
>>
>> 16791 owncloud  10 -10  384m  46m  25m S  13,9  1,9   0:06.10
>> php5-fpm                                                                                                                        
>>
>> 16830 owncloud  10 -10  382m  43m  24m S  13,9  1,8   0:04.67
>> php5-fpm                                                                                                                        
>>
>> 16789 owncloud  10 -10  386m  48m  25m S  13,6  2,0   0:07.85
>> php5-fpm                                                                                                                        
>>
>> 16880 owncloud  10 -10  375m  36m  24m S  13,3  1,5   0:01.02
>> php5-fpm                                                                                                                        
>>
>> 16740 owncloud  10 -10  389m  50m  24m S  12,9  2,1   0:09.45
>> php5-fpm                                                                                                                        
>>
>> 16741 owncloud  10 -10  388m  50m  24m S  12,9  2,1   0:09.08
>> php5-fpm                                                                                                                        
>>
>> 16831 owncloud  10 -10  381m  42m  24m R  12,9  1,8   0:04.30
>> php5-fpm                                                                                                                        
>>
>> 16836 owncloud  10 -10  379m  40m  24m S  12,9  1,7   0:02.81
>> php5-fpm                                                                                                                        
>>
>> 16739 owncloud  10 -10  390m  51m  24m S  12,3  2,2   0:10.11 php5-fpm
>>
>>
>> Where the problem might be, please? *What shall I do?*
>>
>> Additional debug info:
>> PHP 5.5.36
>>
>> mysql  Ver 15.1 Distrib 10.0.25-MariaDB
>>
>> owncloud:
>>   - version: 8.2.5.2
>>   - versionstring: 8.2.5
>>
>> Apache/2.4.10 (Debian)
>>
>> OS:
>>   Description:    Debian GNU/Linux 7.11 (wheezy)
>>   Release:    7.11
>>
>>
>> Thanks a lot
>> McZ
>>
> Whatever the problem is, it probably does not lie with Owncloud as a
> script should in no circumstance cause an interpreter to segfault. The
> problem most likely lies with either your specific PHP version or an
> extension you have installed, you could try to get a backtrace or a
> core dump to find out exactly where it segfaults.
>
> Have you considered moving to PHP7? It is 'the future', after all. It
> is maturing rapidly and works well on older hardware.
>
> Gr//Fr
> _______________________________________________
> Devel mailing list
> Devel at owncloud.org
> http://mailman.owncloud.org/mailman/listinfo/devel

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