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: php at grindau 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: My only working workaround looks as the follows: $cwd='/tmp'; $descriptorspec = array( 0 => array("pipe", "r"), 1 => array("pipe", "w"), 2 => array("file", "/tmp/error-output.txt", "a") ); $process = proc_open('csso '.ROOT_PATH.'/tmp/style-'.$type.'-uncritical-unoptimized.css '.ROOT_PATH.'/tmp/style-'.$type.'-uncritical.css --comments none', $descriptorspec, $pipes, '/tmp'); stream_get_contents($pipes[1]); fclose($pipes[1]); Previous Comments: ------------------------------------------------------------------------ [2017-04-17 20:21:57] jlaustill at gmail dot com I am running into this same issue on php 5.6.30 running on Ubuntu 16.04. I'm trying to call minify(node.js library). Here's the exact call I'm making. public function minifyJsFile($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. ------------------------------------------------------------------------ [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. ------------------------------------------------------------------------ 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