#41593 [Com]: FastCGI does not handle graceful reload/shutdown

ID: 41593 Comment by: dan at sypher7 dot com Reported By: jonepet at dcvhost dot no Status: No Feedback Bug Type: CGI related Operating System: Linux PHP Version: 5.2.3 Assigned To: dmitry New Comment: I was able to reproduce this in the 4.4.8 version of PHP using the latest mod_fastcgi and Apache 1.3. From what I understand, a graceful reload sends a SIGUSR1 to Apache. The FastCGI processor manager then sends SIGTERMs to all of the running processes. Instead of exiting cleanly, the PHP script ends abruptly and doesn't even finish sending headers. Here is what Apache's log had to say about it: FastCGI: incomplete headers (0 bytes) received from server "/path/to/php-fcgi-wrapper" I've tried messing with the FastCgiConfig settings a lot, but nothing in there appears to be changing the result. I do not know either codebase well, so I can't say with certainty if this is a mod_fastcgi or PHP bug. It would appear that either PHP isn't closing out cleanly on a SIGTERM or mod_fastcgi isn't waiting around for the process to end. Previous Comments: ------------------------------------------------------------------------ [2007-12-18 01:00:01] php-bugs at lists dot php dot net No feedback was provided for this bug for over a week, so it is being suspended automatically. If you are able to provide the information that was originally requested, please do so and change the status of the bug back to "Open". ------------------------------------------------------------------------ [2007-12-10 16:15:16] dmitry@php.net I'm not able to reproduce the HTTP 500 response on graceful restart with PHP_5_3, mod_fastcgi and Apache. ------------------------------------------------------------------------ [2007-11-19 18:56:25] jani@php.net This is still buggy. ------------------------------------------------------------------------ [2007-10-16 20:48:22] andrei dot nigmatulin at gmail dot com Graceful reload/shutdown implemented in unofficial patch http://php-fpm.anight.org/. For now docs are in Russian, though. ------------------------------------------------------------------------ [2007-06-13 19:25:56] severn-php at xephris dot net Re: mod_fcgid: I see... I guess I'll modify mod_fcgid myself for that setup. That doesn't explain the mod_fastcgi problems though. I thought it might be something with my setup so I rebuilt it from scratch... might have had some old crap left behind. I don't get 500 errors with PHP 5.2.3 + mod_fastcgi 2.4.2 + Apache 1.3.37 anymore, so it does look fixed in 5.2.3... but I get another strange problem: doing a graceful restart shortens the sleep time to zero. i.e. <?php $a = time(); sleep(30); echo time()-$a; ?> Going to this page then doing a graceful after 5 seconds would give "5" instead of the expected "30". php5.fcgi== #!/bin/sh export PHP_FCGI_CHILDREN=4 exec /opt/php5/bin/php-cgi $* For the record, PHP 4.4.7 dies with a 500 error, but that's not a big problem for us... Could the OP perhaps provide us some info on what versions of Apache and mod_fastcgi/mod_fcgid so we can try replicating it? ------------------------------------------------------------------------ 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/41593 -- Edit this bug report at http://bugs.php.net/?id=41593&edit=1