Bug #70185 [Com]: php-fpm restarts master process in a loop when exec() and using ssh multiplexing

Edit report at https://bugs.php.net/bug.php?id=70185&edit=1 ID: 70185 Comment by: jlaustill at gmail dot com Reported by: kobenews at cox dot net Summary: php-fpm restarts master process in a loop when exec() and using ssh multiplexing Status: Open Type: Bug Package: FPM related Operating System: CentOS release 6.6 (Final) PHP Version: 5.4.43 Block user comment: N Private report: N New Comment: I am running into this same issue on php 5.6.30 running on Ubuntu 16.04. I'm trying to call minify(node.js library). Here's the exact call I'm making. public function minifyJsFile($source, $dest) { $result = exec('minify ' . $source . ' > ' . $dest); if ($result) { return false; } else { return filemtime($dest); } } I have been unable to find a workaround. But I'm not a php expert by any stretch. My background is c/c++/C#/javascript mainly. Previous Comments: ------------------------------------------------------------------------ [2017-04-13 20:22:00] merrill at oakland dot edu We are seeing the same issue, although in our case we aren't doing anything with a socket in SSH. We are just connecting an issuing a command - in fact I can just do "ssh sshserver.whatever -i pathtoidentfile \"sleep 10\"" and php-fpm will keep responding processes, flooding the logs with warnings and causing the machine to bottleneck. ------------------------------------------------------------------------ [2017-04-13 08:43:56] php at grindau dot com I will never report a bug again. This kind of ignorance is just bullshit. ------------------------------------------------------------------------ [2017-03-24 09:36:17] please at forget dot me dot uk I have the same problem on php 7.0.17(from 7.0.15) with FreeBSD 11. restarting php-fpm helps. however, I am using perl modules inside nginx to look after node CSS - and CSS files produce cut versions like PHP-fpm so I assume problem is somewhere in the middle of: php-fpm -- nginx -- node ; with perl I have to restart webserver. ------------------------------------------------------------------------ [2017-03-18 21:35:45] php at grindau dot com Any news on this? Is it reproduceable? While rechering i found some topics about stdin non-blocking behaviour of apps which might cause that issue. Hope that helps. ------------------------------------------------------------------------ [2017-03-13 14:31:09] php at grindau dot com Well, there is no shell-scripts, this code runs inside of my classes. I was able to narrow it down to all shell functions like passthru(), exec(), shell_exec(), system(), etc, it happens with every of them. i tried to run this cli-module on my arch linux: https://github.com/css/csso by executing this /usr/lib/node_modules/csso/bin/csso infile.css --output outfile.css the same happened with UglifyCSS: https://github.com/fmarcia/UglifyCSS but not with UglifyJS: https://github.com/mishoo/UglifyJS I am also running java jars inside those functions for years without any issue. Like Yuicompressor: http://yui.github.io/yuicompressor/ Hope that helps. Regards Sascha ------------------------------------------------------------------------ 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 https://bugs.php.net/bug.php?id=70185 -- Edit this bug report at https://bugs.php.net/bug.php?id=70185&edit=1