segfaults when using XCache 3.0.3 under heavy load
|Reported by:||boxdev||Owned by:||moo|
Hi. I am working with David Schnepper from Box to troubleshoot segfaults on our site. He previously worked with you on XCache 2.0.1. You took his fixes for XCache 2.0.1 and created XCache 3.0.3. Box upgraded to XCache 3.0.3 but we are still seeing the segfaults.
I have attached some stack traces. We would appreciate your feedback on what other data we can gather.
Version of XCache: php-xcache-3.0.3-5.4_box1.el6.x86_64
Version of PHP: php-5.4.13-1.el6.x86_64
Version of Apache: httpd-2.2.15-28.sl6.x86_64
OS: Scientific Linux 6
Output of 'uname -a': Linux pod4201-upload01.pod.box.net 2.6.32-220.el6.x86_64 #1 SMP Sat Dec 10 17:04:11 CST 2011 x86_64 x86_64 x86_64 GNU/Linux
Frequency of occurrence: Normally very low. But much more frequent when out test-driver uses around 150 concurrent processes or more.
xcache.readonly_protection = Off