ID: 47640
User updated by: manuel dot schmitt at manitu dot de
Reported By: manuel dot schmitt at manitu dot de
-Status: Feedback
+Status: Open
Bug Type: Session related
Operating System: Linux
PHP Version: 5.2.9
New Comment:
The most simple script at all
<?php
session_start();
?>
can cause the problem, please take my notes I posted before into
attention.
Previous Comments:
------------------------------------------------------------------------
[2009-03-13 13:26:21] jani@php.net
Thank you for this bug report. To properly diagnose the problem, we
need a short but complete example script to be able to reproduce
this bug ourselves.
A proper reproducing script starts with <?php and ends with ?>,
is max. 10-20 lines long and does not require any external
resources such as databases, etc. If the script requires a
database to demonstrate the issue, please make sure it creates
all necessary tables, stored procedures etc.
Please avoid embedding huge scripts into the report.
------------------------------------------------------------------------
[2009-03-13 10:06:52] manuel dot schmitt at manitu dot de
Description:
------------
PHP internal session handler does not correctly closes flock()s on
session files
Reproduce code:
---------------
(This bug seems the same issue as bug #32092)
The problem happens on various PHP applications, no matter what they do
exactly. Only one same thing: They are all using PHP sessions.
In these cases Apache/PHP-processes hanging forever (until killed). I
have strace'd the processed, they are hanging on flock()ing the session
file as
flock(FILE_ID, LOCK_EX, <unfinished>)
where FILE_ID is a /tmp/sess_XXX-File (not on NFS, just local) [I have
traced this from /proc/PROCID/fd/FILE_ID which links to the session
file]
I suppose that there was an php process flock()ing the file, perhaps
running into max_execution_time, not unflocking the session file
correctly and other processed wanting to write session data.
Expected result:
----------------
PHP session handler should have some timeout and/or old file locks
should be hard-broken.
Actual result:
--------------
Forever-Hanging php processes.
------------------------------------------------------------------------
--
Edit this bug report at http://bugs.php.net/?id=47640&edit=1