#20383 [NEW]: PHP (php4apache2.dll) Crashes Apache under load

From: michael@shunra.co.il Operating system: Windows 2000 PHP version: 4.2.3 PHP Bug Type: Apache2 related Bug description: PHP (php4apache2.dll) Crashes Apache under load I have installed apache_2.0.43-win32-x86-no_ssl.msi (downloaded binary from http://nagoya.apache.org/dist/httpd/binaries/win32 directory) and php-4.2.3-installer.exe on Windows 2000 Professional. I experienced a problem with Apache refusing to start when I tried to load the php4apache2.dll module. After much searching, I got php4-win32-latest.zip from http://snaps.php.net/win32. I am not sure what PHP build this is exactly, but using the module from this package, I got things up and running (I had to add “ScriptAlias /php/ "C:/php/"” to get it working, even that the documentation does not require this for sapi). However, when I started to load stress the site (2 users hitting at about 100 requests per second), the Apache service started crashing (You get a popup “The instruction at “0x77fcbaac” referenced memory at “0x6d74682c”. The memory could not be “read”.) After the first access violation, the service keeps responding for a while, until it hangs up completely. The problem persists, even if the php page does not contain any <?php ?> directives. It does not occur for static .html files under the same conditions. The crash is probably thread related. If I configure Apache2 to use only one worker thread, or load the server with just one concurrent request, the problem disappears. I suspect that the crash occurs also under IIS5.0. I have tested it on IIS, and got some failed requests. I assume IIS catches the exception quietly. P.S. You must use some sort of Web loading tool, simply opening two browsers does not grantee the crash reproduction. I assume that in a real loaded website, the crash will also occur. -- Edit bug report at http://bugs.php.net/?id=20383&edit=1 -- Try a CVS snapshot: http://bugs.php.net/fix.php?id=20383&r=trysnapshot Fixed in CVS: http://bugs.php.net/fix.php?id=20383&r=fixedcvs Fixed in release: http://bugs.php.net/fix.php?id=20383&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=20383&r=needtrace Try newer version: http://bugs.php.net/fix.php?id=20383&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=20383&r=support Expected behavior: http://bugs.php.net/fix.php?id=20383&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=20383&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=20383&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=20383&r=globals PHP 3 support discontinued: http://bugs.php.net/fix.php?id=20383&r=php3 Daylight Savings: http://bugs.php.net/fix.php?id=20383&r=dst IIS Stability: http://bugs.php.net/fix.php?id=20383&r=isapi