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

From: robert at profundis dot se Operating system: Windows XP Professional SP1 PHP version: 4.3.3 PHP Bug Type: Apache2 related Bug description: Some requests cause Apache to crash/restart Description: ------------ Platform: Apache 2.0.47 / PHP 4.3.3 Windows XP Pro SP 1 Problem: It is similar to bug 24958 (http://bugs.php.net/bug.php?id=24958), reportedly fixed a while ago, but... In short: Sometimes a request cause Apache/PHP to crash, and restart itself. This first came to my attention when a visitor complained that very often two pages failed to load (the notorious IE "error" message). I noticed that these two pages where the largest PHP generated ones, 12 & 14k while others were about 5-6k. A sniff revealed that the TCP session was terminated immediately after the request to these pages. I then noticed in Apache's error log a frequent line: "[notice] Parent: child process exited with status 4294967295 -- Restarting" I now understood that this happens from time to time to others as well, but that the request was resubmitted so it simply produced a little delay while Apache was restarting. However, I cause Apache to crash perhaps 1 time in 20 requests to this page, while this visitor seem to do it 3 times in 4 requests. No clue what would make this difference. I am now usually able to reproduce this myself, by quickly reloading the page; the bigger the output, the more likely it is to cause the crash. A document like this: <?php for($i; $i < 15000; ++$i) echo '-'; ?> And requesting it two times in perhaps 2/10 second, will in almost all cases cause the crash. I have also verified this behaviour in the latest stable 4.3.4-dev build (php4-win32-STABLE-200309170430.zip). I cannot trace this crashing (in the log) before a few days ago when I upgraded from 4.3.1-dev to 4.3.3. Regards, Robert Andersson -- Edit bug report at http://bugs.php.net/?id=25570&edit=1 -- Try a CVS snapshot (php4): http://bugs.php.net/fix.php?id=25570&r=trysnapshot4 Try a CVS snapshot (php5): http://bugs.php.net/fix.php?id=25570&r=trysnapshot5 Fixed in CVS: http://bugs.php.net/fix.php?id=25570&r=fixedcvs Fixed in release: http://bugs.php.net/fix.php?id=25570&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=25570&r=needtrace Try newer version: http://bugs.php.net/fix.php?id=25570&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=25570&r=support Expected behavior: http://bugs.php.net/fix.php?id=25570&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=25570&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=25570&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=25570&r=globals PHP 3 support discontinued: http://bugs.php.net/fix.php?id=25570&r=php3 Daylight Savings: http://bugs.php.net/fix.php?id=25570&r=dst IIS Stability: http://bugs.php.net/fix.php?id=25570&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=25570&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=25570&r=float