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 Updated by: cmb@php.net Reported by: maggus dot staab at googlemail dot com Summary: session_start() is not subject to max_execution_time Status: Open Type: Bug Package: Session related PHP Version: Irrelevant Block user comment: N Private report: N New Comment: It is documented[1] that: | The maximum execution time is not affected by system calls, | stream operations etc. Please see the set_time_limit() function | for more details. So, in my opinion, this is not a bug. [1] <http://php.net/manual/en/info.configuration.php#ini.max-execution-time> Previous Comments: ------------------------------------------------------------------------ [2016-06-06 16:12:43] maggus dot staab at googlemail dot com fixed package ------------------------------------------------------------------------ [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 ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=72345&edit=1