Bug #72345 [Opn]: session_start() is not subject to max_execution_time
Edit report at https://bugs.php.net/bug.php?id=72345&edit=1
ID: 72345
User updated by: maggus dot staab at googlemail dot com
Reported by: maggus dot staab at googlemail dot com
Summary: session_start() is not subject to max_execution_time
Status: Open
Type: Bug
-Package: *General Issues
+Package: Session related
PHP Version: Irrelevant
Block user comment: N
Private report: N
New Comment:
fixed package
Previous Comments:
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[2016-06-06 15:54:47] maggus dot staab at googlemail dot com
Description:
------------
time spent in session_start() is not subject to max_execution_time().
this can cause php to block all its worker processes by waiting for the session_lock, which finally
leads to a no longer responding website.
shouldn't a process error and exit after max_execution_time-seconds when it is not able to
aquire the session lock while session_start()?
running with php 5.4 (as this is the most recent version which ubuntu12lts provides)
PHP 5.4.45-3+deb.sury.org~precise+1 (cli) (built: Jan 7 2016 15:32:17)
Copyright (c) 1997-2014 The PHP Group
Zend Engine v2.4.0, Copyright (c) 1998-2014 Zend Technologies
with Zend Debugger v6.0.0, Copyright (c) 1999-2013, by Zend Technologies
with blackfire v1.10.6, https://blackfire.io, by Blackfireio
Inc.
Test script:
---------------
<?php
// run the script 2x concurrently
set_time_limit(5);
echo "acquire session lock:". time() ."\n";
session_start();
echo "got session lock:". time()."\n";
sleep(10);
echo "finished:". time()."\n";
Expected result:
----------------
1st instance should report
>acquire session lock:1465227871
>got session lock:1465227871
>finished:1465227881
2nd instance should error after 5 seconds because session_start() is not able to aquire a session
lock within 5 seconds
Actual result:
--------------
1st instance reports
>acquire session lock:1465227871
>got session lock:1465227871 // LOCK immediately acquired
>finished:1465227881
2nd instance reports
>acquire session lock:1465227872
>got session lock:1465227881 // LOCK acquired after 1st instance exit'ed
>finished:1465227891
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Edit this bug report at https://bugs.php.net/bug.php?id=72345&edit=1
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