I haven't had this problem on any other server, so I'm wondering if anyone else experienced this issue. The strange part is that the lock up happens at random - sessions will work fine for 10 minutes to an hour, then I'll make a request and I'll just see the browser waiting for reply. It never times out and I have to restart Apache2 to get sessions running.
My test.php script:
error_reporting(E_ALL);
session_start();
print_r($_SESSION);
echo 'got here';
When I get a lock up, commenting out the session_start(); shows 'got here'. So it's something to do with PHP sessions. It's setup to use files in /var/lib/php/session. Opening an incognito window doesn't help.
Potentially relevant details:
Web Server: Apache2 with Prefork
OS: CentOS 6.4 x64
HD: 5+ GB free
Memory: 10+ GB free
If you need any other info please ask!
