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:
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!
Previous Comments:
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[2009-03-15 12:19:31] jani@php.net
Please provide script(s) that reliably can be used to reproduce this.
I can not reproduce this anywhere (even high traffic sites using
sessions). Just saying something happens does not make it true..
------------------------------------------------------------------------
[2009-03-15 11:24:15] manuel dot schmitt at manitu dot de
The most simple script at all
<?php
session_start();
?>
can cause the problem, please take my notes I posted before into
attention.
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[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.
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