Hi all,

A user ran into this problem in their Cool Stack deployment.  There may 
not be enough here to try to duplicate the issue, but the findings are 
certainly troubling.

- Matt

-------- Original Message --------
Subject:        [Cool Tools] APC caching issue on Coolstack 1.3
Date:   Mon, 27 Oct 2008 10:26:11 -0700
From:   Sun Developer Forums Watch <forumswa...@sun.com>
To:     Matt Ingenthron <Matt.Ingenthron at Sun.COM>



Matt Ingenthron,

You are watching the forum "Cool Tools", which was updated Oct 27, 2008 
10:26:06 AM by xander7777:

<http://forums.sun.com/forum.jspa?forumID=857>
or
<http://forums.sun.com/thread.jspa?threadID=5343017>

For your convenience, the new message is included below:
--------------------------------------------------------------
Hi,

We're trying out Cool Stack 1.3 on a Sun T5220 SPARC server, running a PHP 
based website. Everything is running on Solaris 10 under a zone.

We use mod_rewrite to redirect all requests (except static content, eg. css, 
images) to one of two PHP files depending on the URL. Ever so often we are 
finding that a certain URL is directed incorrectly to the other PHP file, 
originally we thought this was a mod_rewrite issue, but closer inspection shows 
that in fact APC is serving the incorrect file from its op-code cache.

Small tests have been placed at the top of each PHP file, to check that the 
file that is executed is actually the one Apache requests. Eg:

if (basename($_SERVER['SCRIPT_FILENAME']) != 'index.php')
    error_log(...)

By looking at the error log, it can be seen that ever so often, the wrong 
script is executed.

We are also finding that this instance of APC doesn't seem to be caching every 
file, it simply misses some out (according to the bundled apc.php). Notably the 
two files mod_rewrite redirects to.

We have no idea what is causing this. We have an older Coolstack build running 
on an identical server (though not under a zone) which we have no problems with.

Any pointers would be much appreciated.

Kind regards,
Alex Forrow
--------------------------------------------------------------

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-- 
Matt Ingenthron 
http://blogs.sun.com/mingenthron/
email: matt.ingenthron at sun.com

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