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Ticket Resolution Summary Owner Reporter
#324 fixed segfaults with xcache.readonly_protection = Off under heavy load moo boxdev
Description

We downloaded xcache-3.0-r1369.tar.bz2 and installed it on our test servers. When we run around 150 concurrent processes, we observe segfaults being generated on our test servers.

I have attached some stack traces. We would appreciate your feedback on what other data we can gather.

Version of XCache: php-xcache-3.0.4-5.4_box1.el6.x86_64 Version of PHP: php-5.4.19-1.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 our test-driver uses around 150 concurrent processes or more. xcache.readonly_protection = Off

This is very similar behavior to XCache 3.0.3.

#328 duplicate segfaults when using XCache 2.0.1 under heavy load moo boxdev
Description

Some of our machines have XCache 2.0.1 installed. In case this helps with troubleshooting XCache 3.0.x, here are some stack traces.

We would appreciate your feedback on what other data we can gather.

Version of XCache: php-xcache-2.0.1-5.4.13_box2.el6.x86_64 Version of PHP: php-5.4.13-1.el6.x86_64 Version of Apache: httpd-2.2.15-15.sl6.1.x86_64 OS: Scientific Linux 6 Output of 'uname -a': Linux pod4201-upload01.pod.box.net 2.6.32-220.23.1.el6.x86_64 #1 SMP Mon Jun 18 09:58:09 CDT 2012 x86_64 x86_64 x86_64 GNU/Linux Frequency of occurrence: Normally very low. But intermittently, every web server request results in a segfault. xcache.readonly_protection = On

Once a server gets into the state where all requests result in a segfault, we bounce httpd and requests can be processed normally again.

#126 invalid Apache 2.2.6 Segfaults with 1.2.1 moo brent@…
Description

Apache 2.2.6 is segfaulting with xCache 1.2.1 and PHP 5.2.4. Using ioncube instead of Zend.

Please see this thread on vBulletin.com for more information on the problem: http://www.vbulletin.com/forum/showthread.php?t=243445

It contains phpinfo and the error logs.

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