#25570 [Opn]: Some requests cause Apache to crash/restart

ID: 25570 User updated by: robert@profundis.se Reported By: robert at profundis dot se Status: Open Bug Type: Apache2 related Operating System: Windows XP Professional SP1 PHP Version: 4.3.4-dev (20030917) New Comment: I did some debugging on my own, and concluded that if two requests overlap, it will crash. I did some primitive logging in apache2handler/sapi_apache2.c/php_handler(), and noticed that the last function to be called was php_handle_aborted_connection(), then Apache crashed and restarted. This was in cases where the second request entered php_handler() before the first had left it. While looking through changes of this source file in the CVS, I noticed diff 1.1.2.17-18 (http://cvs.php.net/diff.php/php-src/sapi/apache2handler/sapi_apache2.c?login=2&r1=1.1.2.17&r2=1.1.2.18&ty=h) which was commit just after 4.3.3RC2 (which doesn't crash). Could it possibly be related? I do currently not have the ability to revert the change and recompile, but I will do so later. Previous Comments: ------------------------------------------------------------------------ [2003-09-17 19:19:30] robert at profundis dot se > Do you have output buffering enabled? No. My tests has been with fresh/default installations of both Apache and PHP. I did now test to set output_buffering = On, in php.ini. phpinfo() reports it to set to '1' (rather than 'On'). The problem remains, and perhaps somewhat more frequent with this setting. Any pointers as how to debug PHP under Windows are welcome, I haven't been able to find any information about this. ------------------------------------------------------------------------ [2003-09-17 18:57:40] iliaa@php.net Do you have output buffering enabled? ------------------------------------------------------------------------ [2003-09-17 06:43:58] robert at profundis dot se Another piece of info. While testing a script like: for($i = 0; $i < 15000; ++$i) $output .= '-'; echo $output; The script (and server) dies inside the echo() function. Still it occurs seldom, usually when the script hasn't been executed for a while, or when brutally reloading the page. Regards, Robert Andersson ------------------------------------------------------------------------ [2003-09-17 05:48:38] robert at profundis dot se After some investigation it seems as this bug was introduced in PHP 4.3.3RC3. I have tested the following versions: 4.3.2 -- OK 4.3.3RC1 -- ? 4.3.3RC2 -- OK 4.3.3RC3 -- Crash 4.3.3RC4 -- Crash 4.3.3 -- Crash 4.3.4-dev -- Crash With the versions designated 'OK', I was unable to reproduce the bug. The '?', I didn't test. I performed the test by constantly reloading (holding down F5) on a <?php phpinfo(); ?> document. ------------------------------------------------------------------------ [2003-09-17 04:39:10] lys_007 at yahoo dot it <?php // OS: Win 2000 Professional // Apache 2.0.47 // PHP 4.3.3 // It worked on older versions of PHP/Apache, // on PHP 4.3.3/Apache 2.0.47 it causes a browser // crash $todisplay = ""; for($i = 0; $i < 300000; $i++) { $todisplay .= "Hello word<br>\n"; } echo $todisplay; ?> ------------------------------------------------------------------------ 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/25570 -- Edit this bug report at http://bugs.php.net/?id=25570&edit=1