ID: 47640 Updated by: j...@php.net Reported By: manuel dot schmitt at manitu dot de -Status: Open +Status: Bogus Bug Type: Session related Operating System: Linux PHP Version: 5.2.9 New Comment:
Endless loops tend to cause such problems. One should always use http://www.php.net/session_write_close as early as possible to prevent race conditions and this kind of "bugs". Previous Comments: ------------------------------------------------------------------------ [2009-03-17 06:32:36] manuel dot schmitt at manitu dot de ARGH! It is so simple! <?php session_start(); while (true) { $i *= 2; } ?> Execute it for the first time and ensure, that it runs into any of the php limits, e.g. maxmimum execution time. Call the script a second time while not running into the limit. When tracing the PHP process you will see an unlimited flock() syscall! ------------------------------------------------------------------------ [2009-03-16 23:46:42] j...@php.net You need to come up with a script / set of scripts which can be used to _reliably_ reproduce the issue. ------------------------------------------------------------------------ [2009-03-16 16:29:03] manuel dot schmitt at manitu dot de But how should I trace this anymore? I can strace apache/php processes seeing that there is a PHP script doing flock() on a file, the process never returns. What should I do? ------------------------------------------------------------------------ [2009-03-16 16:25:10] j...@php.net I'm actually running also s9y installation in the high traffic server. Never had any hanging PHP processes. And many times scripts have run to limits due to database being too slow. Still, no hangups with sessions. As this is quite impossible to reproduce, please try and figure out what really causes it. I know it's hard but otherwise we can keep on guessing and that's pretty useless. ------------------------------------------------------------------------ [2009-03-16 08:07:22] manuel dot schmitt at manitu dot de E.g. any S9Y installation does reproduce this. I cannot post this here because it has lots of files. BUT as I told you I said what I suppose. I suppose that scripts running into any php limit (e.g. execution time) do not properly close the session files. It does NOT happen when scripts are correctly finished! ------------------------------------------------------------------------ The remainder of the comments for this report are too long. To view the rest of the comments, please view the bug report online at http://bugs.php.net/47640 -- Edit this bug report at http://bugs.php.net/?id=47640&edit=1
