Hi, I've tracked down the Source of the Problem, see https://issues.apache.org/bugzilla/show_bug.cgi?id=46501
Ciao, Werner Detter On 16 Jan., 12:51, cidcampeador <[email protected]> wrote: > 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 <[email protected]> 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
