Got almost the same errors here. We recently upgraded to Ubuntu 8.10, which brings Kernel 2.6.27.
I've debugged this problem till see it's somewhat related to getting objects from a remote memcache server. It works fine sometimes, and then the Apache process crash. Tested on: Apache 2.2.9 and 2.2.11 PHp 5.2.6 and 5.2.8 php5-Memcache 3.0.3 and 3.0.2 I've got some other servers running prior kernel and PHP-memcache versions with the same PHP code and run perfectly fine. I have other network problems with Kernel 2.6.27. Masquerading suddenly stopped working too. Kitai On 18 dic 2008, 15:38, Wayne <w...@ilum.org> wrote: > Hi folks, > > first of an overview about the software I'm currently using on the > webserver: > - Apache 2.2.11 > - PHP 5.2.8 > - Memcache 1.2.6 PHP-API > - Memcached-Daemon 2.2.4 > - Libevent 1.4.5-stable > > Since I've upgraded the Kernel of the Webserver from version 2.6.26.8 > to version 2.6.27.9 the Apache Webserver on the machine started to > Segfault: > > [Thu Dec 18 13:38:09 2008] [notice] child pid 6586 exit signal > Segmentation fault (11) > [Thu Dec 18 13:38:09 2008] [notice] child pid 6587 exit signal > Segmentation fault (11) > [Thu Dec 18 13:38:09 2008] [notice] child pid 6588 exit signal > Segmentation fault (11) > [Thu Dec 18 13:38:09 2008] [notice] child pid 6590 exit signal > Segmentation fault (11) > > Well, bad news so far. I've then activated Core Dumps within Apache > and started to generate Requests > with Apache Bench and checked the Core Dump (gdb /usr/local/apache2/ > bin/httpd /tmp/core). In the CoreDump i can see the following: > > Reading symbols from /usr/local/lib/php/extensions/no-debug-non- > zts-20060613/memcache.so...done. > Loaded symbols for /usr/local/lib/php/extensions/no-debug-non- > zts-20060613/memcache.so > Failed to read a valid object file image from memory. > > As soon as I deactivate "extension=memcache.so" from the PHP php.ini > file, Apache is running without any > Problems nor Segfaults. In the next steps I've done the following > > - Recompiled the Memcache PHP-API 2.2.4 > - Switched the Memcache PHP-API from 2.2.4 to 3.0.2beta > - Reinstalled Memcached 1.2.6 > - Updated libevent from 1.4.5stable to 1.4.8stable > > Without any luck :-( With Linux Kernel 2.6.26.8 beneath everything is > just working fine. Do you have an > idea? Please, tell me any information you need for helping me > debugging this issue, i really want to > solve this :-) > > thank you for all your help, > Wayne
