Bug #62418 [Com]: php-fpm master process crashes

Edit report at https://bugs.php.net/bug.php?id=62418&edit=1 ID: 62418 Comment by: webmaster at jbfavre dot org Reported by: php at scratchspace dot com Summary: php-fpm master process crashes Status: Feedback Type: Bug Package: FPM related Operating System: CentOS 6.2 x86_x64 PHP Version: 5.3.14 Block user comment: N Private report: N New Comment: Hello, We have the same problem, with PHP 5.3.21 behind Nginx 1.2.6. Happens, sometimes, at PHP-FPM reload, after updating the code. We're running a Symfony web app, on Ubuntu 10.04 Lucid with home-made PHP packages. Enabled modules --------------- amqp 1.0.9 apc 3.1.9 curl 5.3.21 gd 5.3.21 geoip 1.0.8 igbinary 1.1.1 intl 5.3.21 memcached 2.1.0 mongo 1.3.0 mysql 5.3.21 pinba 1.1.0 redis 2.2.2 Have just modified FPM configuration to use 'poll' instead of default 'epoll'. Will see what happen. 2 backtraces available (I can provide coredumps upon request) ------------------------------------------------------------ ############################### #0 0x0000444c48434749 in ?? () #1 0x0000000000761703 in fpm_event_epoll_wait (queue=0x1f270e8, timeout=3) at /tmp/buildd/php5-5.3.21/sapi/fpm/fpm/events/epoll.c:143 #2 0x0000000000755e0f in fpm_event_loop (err=0) at /tmp/buildd/php5-5.3.21/sapi/fpm/fpm/fpm_events.c:403 #3 0x0000000000750d67 in fpm_run (max_requests=0x7fff3704f79c) at /tmp/buildd/php5-5.3.21/sapi/fpm/fpm/fpm.c:113 #4 0x000000000075872e in main (argc=3, argv=0x7fff37051908) at /tmp/buildd/php5-5.3.21/sapi/fpm/fpm/fpm_main.c:1838 ############################### #0 0x00000000007558d6 in fpm_event_fire (ev=0x2ae4d78) at /tmp/buildd/php5-5.3.21/sapi/fpm/fpm/fpm_events.c:459 #1 0x0000000000761703 in fpm_event_epoll_wait (queue=0x2ae4d78, timeout=3) at /tmp/buildd/php5-5.3.21/sapi/fpm/fpm/events/epoll.c:143 #2 0x0000000000755e0f in fpm_event_loop (err=0) at /tmp/buildd/php5-5.3.21/sapi/fpm/fpm/fpm_events.c:403 #3 0x0000000000750d67 in fpm_run (max_requests=0x7fff94e7286c) at /tmp/buildd/php5-5.3.21/sapi/fpm/fpm/fpm.c:113 #4 0x000000000075872e in main (argc=3, argv=0x7fff94e749d8) at /tmp/buildd/php5-5.3.21/sapi/fpm/fpm/fpm_main.c:1838 Regards, Jean Baptiste Favre Previous Comments: ------------------------------------------------------------------------ [2012-07-04 10:30:04] fat@php.net Thank you for this bug report. To properly diagnose the problem, we need a backtrace to see what is happening behind the scenes. To find out how to generate a backtrace, please read http://bugs.php.net/bugs-generating-backtrace.php for *NIX and http://bugs.php.net/bugs-generating-backtrace-win32.php for Win32 Once you have generated a backtrace, please submit it to this bug report and change the status back to "Open". Thank you for helping us make PHP better. If you were able to give us a complete and detailed stack trace it would be useful. thx ------------------------------------------------------------------------ [2012-06-27 20:10:08] rasmus@php.net Not sure. Many people out there run with epoll without problems. ------------------------------------------------------------------------ [2012-06-27 18:28:14] php at scratchspace dot com We've been up and running for 24 hours with "events.mechanism = poll" and no problems. Let's give it a couple of days to be sure this workaround works. Is this issue specific to epoll and the way we have php-fpm configured (to use minimal resources), or is this is a bug in php-fpm that can ultimately be fixed? ------------------------------------------------------------------------ [2012-06-26 06:10:02] rasmus@php.net Could you check if it is related to epoll? In your php-fpm.conf file, set: events.mechanism = poll to try with "poll" instead. You can also try setting it to "select" ------------------------------------------------------------------------ [2012-06-26 05:56:45] php at scratchspace dot com Description: ------------ php-fpm master process crashes randomly on lightly loaded server running nginx/0.8.54 with various CMS applications. It is unknown how to reproduce the crash, but occurs in both php 5.3.13 and 5.3.14. Actual result: -------------- 5.3.14 backtrace Core was generated by `php-fpm:'. Program terminated with signal 11, Segmentation fault. #0 0x00000000016b5300 in ?? () #1 0x00000000006e02f3 in fpm_event_epoll_wait (queue=<value optimized out>, timeout=<value optimized out>) at /usr/src/debug/php-5.3.14/sapi/fpm/fpm/events/epoll.c:143 #2 0x00000000006d508f in fpm_event_loop (err=0) at /usr/src/debug/php- 5.3.14/sapi/fpm/fpm/fpm_events.c:401 #3 0x00000000006d01f7 in fpm_run (max_requests=0x7fffd103136c) at /usr/src/debug/php-5.3.14/sapi/fpm/fpm/fpm.c:110 #4 0x00000000006d79a4 in main (argc=1, argv=0x7fffd10334d8) at /usr/src/debug/php-5.3.14/sapi/fpm/fpm/fpm_main.c:1778 ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=62418&edit=1