Debian Bug report logs - #772975
Random Segfault(11) php5-fpm when Overload

[Message part 1 (text/plain, inline)]
Package: php5-fpm
Version: 5.4.35-0+deb7u2
Severity: Important

Dear maintainer,

We experience random php5-fpm process segfault on our
servers in high load situations. We use the official php5 Debian package
from stable Wheezy repository.

This issue seems to affect often the same fpm-pool/websites.
The service works again after a restart of the php5-fpm
service

I reproduce that bug in VM simulate lot of request with siege tools and
generate backtraces with php5-dbg and GDB (backtraces in attachment)

This issue seems to be related to apc, because
when I disable apc for a pool I don't get new segfault again for this
pool.

Best regards,
Léo

Environment:
Debian Wheezy - Linux mstest 3.2.0-4-amd64 #1 SMP Debian 3.2.63-2+deb7u2
x86_64 GNU/Linux

PHP 5.4.35-0+deb7u2 (cli) (built: Nov 19 2014 07:56:24)
Copyright (c) 1997-2014 The PHP Group
Zend Engine v2.4.0, Copyright (c) 1998-2014 Zend Technologies

-- System Information:
Debian Release: 7.7
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 3.2.0-4-amd64 (SMP w/3 CPU cores)
Locale: LANG=fr_FR.UTF-8, LC_CTYPE=fr_FR.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages php5-fpm depends on:
ii  dpkg              1.16.15
ii  libbz2-1.0        1.0.6-4
ii  libc6             2.13-38+deb7u6
ii  libcomerr2        1.42.5-1.1
ii  libdb5.1          5.1.29-5
ii  libgssapi-krb5-2  1.10.1+dfsg-5+deb7u2
ii  libk5crypto3      1.10.1+dfsg-5+deb7u2
ii  libkrb5-3         1.10.1+dfsg-5+deb7u2
ii  libmagic1         5.11-2+deb7u6
ii  libonig2          5.9.1-1
ii  libpcre3          1:8.30-5
ii  libqdbm14         1.8.78-2
ii  libssl1.0.0       1.0.1e-2+deb7u13
ii  libxml2           2.8.0+dfsg1-7+wheezy2
ii  mime-support      3.52-1
ii  php5-common       5.4.35-0+deb7u2
ii  tzdata            2014h-0wheezy1
ii  ucf               3.0025+nmu3
ii  zlib1g            1:1.2.7.dfsg-13

php5-fpm recommends no packages.

Versions of packages php5-fpm suggests:
pn  php-pear  <none>

-- no debconf information

/var/log/php5-fpm
[10-Dec-2014 09:43:07] WARNING: [notice] child 6948 exited on signal 11
(SIGSEGV - core dumped) after 126.995947 seconds from start
[10-Dec-2014 09:43:11] WARNING: [notice] child 6953 exited on signal 11
(SIGSEGV - core dumped) after 30.171278 seconds from start
[10-Dec-2014 09:44:02] WARNING: [notice] child 6955 exited on signal 11
(SIGSEGV - core dumped) after 50.704723 seconds from start
[10-Dec-2014 09:44:14] WARNING: [notice] child 6956 exited on signal 11
(SIGSEGV - core dumped) after 61.369326 seconds from start
[10-Dec-2014 09:45:23] WARNING: [notice] child 6965 exited on signal 11
(SIGSEGV - core dumped) after 61.521431 seconds from start

[6948-GDB_trace_CoreDump_php5-fpm (text/plain, attachment)]
[6953-GDB_trace_CoreDump_php5-fpm (text/plain, attachment)]
[6955-GDB_trace_CoreDump_php5-fpm (text/plain, attachment)]
[6956-GDB_trace_CoreDump_php5-fpm (text/plain, attachment)]
[6965-GDB_trace_CoreDump_php5-fpm (text/plain, attachment)]
[signature.asc (application/pgp-signature, attachment)]
Control: reassing -1 php5-apc

So, why did you assign this to php5-fpm if you have diagnosed the bug to
be caused by APC?

Reassigning this to php5-apc.

Cheers,
Ondrej

On Fri, Dec 12, 2014, at 17:36, Léo BERRY wrote:
> Package: php5-fpm
> Version: 5.4.35-0+deb7u2
> Severity: Important
> 
> Dear maintainer,
> 
> We experience random php5-fpm process segfault on our
> servers in high load situations. We use the official php5 Debian package
> from stable Wheezy repository.
> 
> This issue seems to affect often the same fpm-pool/websites.
> The service works again after a restart of the php5-fpm
> service
> 
> I reproduce that bug in VM simulate lot of request with siege tools and
> generate backtraces with php5-dbg and GDB (backtraces in attachment)
> 
> This issue seems to be related to apc, because
> when I disable apc for a pool I don't get new segfault again for this
> pool.
> 
> Best regards,
> Léo
> 
> Environment:
> Debian Wheezy - Linux mstest 3.2.0-4-amd64 #1 SMP Debian 3.2.63-2+deb7u2
> x86_64 GNU/Linux
> 
> PHP 5.4.35-0+deb7u2 (cli) (built: Nov 19 2014 07:56:24)
> Copyright (c) 1997-2014 The PHP Group
> Zend Engine v2.4.0, Copyright (c) 1998-2014 Zend Technologies
> 
> 
> -- System Information:
> Debian Release: 7.7
>   APT prefers stable-updates
>   APT policy: (500, 'stable-updates'), (500, 'stable')
> Architecture: amd64 (x86_64)
> 
> Kernel: Linux 3.2.0-4-amd64 (SMP w/3 CPU cores)
> Locale: LANG=fr_FR.UTF-8, LC_CTYPE=fr_FR.UTF-8 (charmap=UTF-8)
> Shell: /bin/sh linked to /bin/dash
> 
> Versions of packages php5-fpm depends on:
> ii  dpkg              1.16.15
> ii  libbz2-1.0        1.0.6-4
> ii  libc6             2.13-38+deb7u6
> ii  libcomerr2        1.42.5-1.1
> ii  libdb5.1          5.1.29-5
> ii  libgssapi-krb5-2  1.10.1+dfsg-5+deb7u2
> ii  libk5crypto3      1.10.1+dfsg-5+deb7u2
> ii  libkrb5-3         1.10.1+dfsg-5+deb7u2
> ii  libmagic1         5.11-2+deb7u6
> ii  libonig2          5.9.1-1
> ii  libpcre3          1:8.30-5
> ii  libqdbm14         1.8.78-2
> ii  libssl1.0.0       1.0.1e-2+deb7u13
> ii  libxml2           2.8.0+dfsg1-7+wheezy2
> ii  mime-support      3.52-1
> ii  php5-common       5.4.35-0+deb7u2
> ii  tzdata            2014h-0wheezy1
> ii  ucf               3.0025+nmu3
> ii  zlib1g            1:1.2.7.dfsg-13
> 
> php5-fpm recommends no packages.
> 
> Versions of packages php5-fpm suggests:
> pn  php-pear  <none>
> 
> -- no debconf information
> 
> /var/log/php5-fpm
> [10-Dec-2014 09:43:07] WARNING: [notice] child 6948 exited on signal 11
> (SIGSEGV - core dumped) after 126.995947 seconds from start
> [10-Dec-2014 09:43:11] WARNING: [notice] child 6953 exited on signal 11
> (SIGSEGV - core dumped) after 30.171278 seconds from start
> [10-Dec-2014 09:44:02] WARNING: [notice] child 6955 exited on signal 11
> (SIGSEGV - core dumped) after 50.704723 seconds from start
> [10-Dec-2014 09:44:14] WARNING: [notice] child 6956 exited on signal 11
> (SIGSEGV - core dumped) after 61.369326 seconds from start
> [10-Dec-2014 09:45:23] WARNING: [notice] child 6965 exited on signal 11
> (SIGSEGV - core dumped) after 61.521431 seconds from start
> 
> _______________________________________________
> pkg-php-maint mailing list
> pkg-php-maint@lists.alioth.debian.org
> http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/pkg-php-maint
> Email had 6 attachments:
> + 6948-GDB_trace_CoreDump_php5-fpm
>   7k (text/plain)
> + 6953-GDB_trace_CoreDump_php5-fpm
>   7k (text/plain)
> + 6955-GDB_trace_CoreDump_php5-fpm
>   7k (text/plain)
> + 6956-GDB_trace_CoreDump_php5-fpm
>   7k (text/plain)
> + 6965-GDB_trace_CoreDump_php5-fpm
>   5k (text/plain)
> + signature.asc
>   1k (application/pgp-signature)

-- 
Ondřej Surý <ondrej@sury.org>
Knot DNS (https://www.knot-dns.cz/) – a high-performance DNS server

Control: reassign -1 php-apc

I didn't mean php5-apcu, I meant php-apc from stable :)

O.

On Mon, Dec 15, 2014, at 21:51, Andrei POPESCU wrote:
> reassign 772975 php5-apcu
> thanks
> 
> On Lu, 15 dec 14, 15:00:11, Debian Bug Tracking System wrote:
> > Processing commands for control@bugs.debian.org:
> > 
> > > reassign 772975 php5-apc
> > Bug #772975 [php5-fpm] Random Segfault(11) php5-fpm when Overload
> > Bug reassigned from package 'php5-fpm' to 'php5-apc'.
> > Warning: Unknown package 'php5-apc'
>           ^^^^^^^^^^^^^^^^^^^^^^^^^^^
> 
> Assuming you meant php5-apcu.
> 
> Kind regards,
> Andrei
> -- 
> http://wiki.debian.org/FAQsFromDebianUser
> Offtopic discussions among Debian users and developers:
> http://lists.alioth.debian.org/mailman/listinfo/d-community-offtopic
> http://nuvreauspam.ro/gpg-transition.txt
> Email had 1 attachment:
> + signature.asc
>   1k (application/pgp-signature)

-- 
Ondřej Surý <ondrej@sury.org>
Knot DNS (https://www.knot-dns.cz/) – a high-performance DNS server

Debian Bug report logs - #772975 Random Segfault(11) php5-fpm when Overload

Debian Bug report logs - #772975
Random Segfault(11) php5-fpm when Overload