Bug #14474 Updated: Apache PHP Module cannot seem to handle large amounts of output

ID: 14474 Updated by: yohgaki Reported By: php@brentc.com Old Status: Open Status: Critical Bug Type: Scripting Engine problem Operating System: Windows XP Pro/Linux PHP Version: 4.1.0 New Comment: I think this is critical Previous Comments: ------------------------------------------------------------------------ [2001-12-12 20:33:45] yohgaki@php.net This problem reveals a memory limit bailout problem. Even if PHP exhsusted memory, script does not exit. PHP logs following logs many times. (Linux/PHP4.1.0, without output buffering) [13-Dec-2001 10:27:52] PHP Fatal error: Allowed memory size of 8388608 bytes exhausted (tried to allocate 10240 bytes) in /home/yohgaki/public_html/bugs/14474/bug.php on line 4 Type is changed to Scripting Engine Problem. ------------------------------------------------------------------------ [2001-12-12 19:28:49] php@brentc.com Note: this seems to be the same problem as #14222, but I can't seem to append stuff to someone elses bug so... This is something I first noticed when I upgraded from XP RC1 to WinXP Final, when using PHP 4.0.6. I upgraded to 4.1.0 today, and it doesn't solve the problem. The php apache module doesn't seem able to handle outputting moderate to large sized pages. I have been able to reliably reproduce the problem with the following script: <?PHP set_time_limit(900); for ($i = 0; $i<1000000; $i++){ print "This is line number " . ($i+1) . "<br>"; } ?> Viewing this page with internet explorer causes it to go into an almost endless loop of relaoding the page. It will display the first few 'this line is number...' and then will reload the page over and over. On some sessions IE will eventually show it's 'The page cannot be displayed' page, and sometimes it will just reload indefinitly. Viewing this page with Mozilla/Netscape doesn't have the same effect. Mozilla doesn't go through the reload loop, but will not show the page as it should either. There will be unexplained (no errors) jumps in numbers/missing output such as: This is line number 2368 This is line number 2369This is line number 2517 This is line number 2518 But the errors in output don't occur in the same spot each time. And evenutally (well short of 1,000,000 lines) the output will just stop with no error, often in mid line. I have found that adding 'flush();' just after the 'print "This is line...' seems to fix the problem. ------------------------------------------------------------------------ Edit this bug report at http://bugs.php.net/?id=14474&edit=1