Question

Ubuntu 14 Nginx php-fpm - 502 Bad Gateway timeout

Hi guys, I’ve a timeout error with Nginx - PHP. After 30 seconds the app return 502 Bad Gateway, always. I’ve changed fast-cgi params, PHP params, Nginx,etc but the problem still arises. The process gets images from Amazon S3 services and zip these images in one zip file.

Nginx Conf

user www-data;
worker_processes 1;
pid /run/nginx.pid;

events {
        worker_connections 768;
        # multi_accept on;
}

http {

        ##
        # Basic Settings
        ##

        #sendfile on;
        #tcp_nopush on;
        #tcp_nodelay on;
        #keepalive_timeout 65;
        #types_hash_max_size 2048;

        #fastcgi_read_timeout 300;
        #CARLOS Settings
        #client_body_timeout 12;


        #client_max_body_size 1g;

        #client_body_buffer_size 10K;
        #client_header_buffer_size 1k;
        #client_max_body_size 8m;
        #large_client_header_buffers 2 1k;

		        #client_body_timeout 300;
        #client_header_timeout 300;
        #keepalive_timeout 300;
        #send_timeout 300;


        # server_tokens off;

        # server_names_hash_bucket_size 64;
        # server_name_in_redirect off;

        include /etc/nginx/mime.types;
        default_type application/octet-stream;

        ##
        # Logging Settings
        ##

        access_log /var/log/nginx/access.log;
        error_log /var/log/nginx/error.log;
        # Gzip Settings
        ##

        gzip on;
        gzip_disable "msie6";

        # gzip_vary on;
        # gzip_proxied any;
        # gzip_comp_level 6;
        # gzip_buffers 16 8k;
        # gzip_http_version 1.1;
        # gzip_types text/plain text/css application/json application/x-javascript text/xml application/xml application/xml+$

        ##
        # nginx-naxsi config
        ##
        # Uncomment it if you installed nginx-naxsi
        ##

        #include /etc/nginx/naxsi_core.rules;

        ##
        # nginx-passenger config
        ##
        # Uncomment it if you installed nginx-passenger
        ##

        #passenger_root /usr;
        #passenger_ruby /usr/bin/ruby;

        ##
        # Virtual Host Configs
        ##

        include /etc/nginx/conf.d/*.conf;
        include /etc/nginx/sites-enabled/*;
}

Site conf.

server {

        listen 80;

        root /var/www/fotopoint.dev/public_html/web;

        server_name dev-admin.fotodelivery.com.ar;

        #rewrite ^/admin\.php/?(.*)$ /$1 permanent;

        location = / {
            index admin.php;
            try_files $uri @symfony;
        }

        location / {
            index admin.php;
            try_files $uri $uri/ @symfony;
        }

        location @symfony {
            rewrite ^(.*)$ /admin.php/$1 last;
        }

        location ~ ^/admin\.php(/|$) {

            include fastcgi_params;
            fastcgi_pass unix:/var/run/php5-fpm.sock;
			
			#fastcgi_read_timeout 300; --- doesn't works
			
            fastcgi_split_path_info ^(.+\.php)(/.*)$;
            fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
            fastcgi_param SCRIPT_NAME $fastcgi_script_name;
        }
}

Nginx - Error log

recv() failed (104: Connection reset by peer) while reading response header
from upstream, client: 186.64.67.120, server: dev-admin.fotodelivery.com.ar, request: "POST /admin/order/zip
HTTP/1.1", upstream: "fastcgi://unix:/var/run/php5-fpm.sock:", host: "dev-admin.fotodelivery.com.ar", referrer:
"http://dev-admin.fotodelivery.com.ar/admin/

PHP -ini parameters changed

upload_max_filesize: 1000M
post_max_size: 1000M

Thanks in advance Carlos

Show comments

Submit an answer

This textbox defaults to using Markdown to format your answer.

You can type !ref in this text area to quickly search our full set of tutorials, documentation & marketplace offerings and insert the link!

Sign In or Sign Up to Answer

These answers are provided by our Community. If you find them useful, show some love by clicking the heart. If you run into issues leave a comment, or add your own answer to help others.

Want to learn more? Join the DigitalOcean Community!

Join our DigitalOcean community of over a million developers for free! Get help and share knowledge in Q&A, subscribe to topics of interest, and get courses and tools that will help you grow as a developer and scale your project or business.

Hi ryanpq. The FPM service crash when I try to zip and download (by PHP) Hundreds of images. All other processes run properly.

I am analysing very closely through tests with another user, and the result indicates, that the problem arise due to the quantity of images not about the timeout. I perform some test with another pcs (bandwith) and the process takes 45 seconds NOT 30 , so the problem isn’t timeout. In all test, the process crash trying to zip image number 110 no matter bandwidth or PC user. Due to this I think the problem can be sockets limit or conection limit, I guess.

Specific PHP process lines:

set_time_limit ( 1200 );    // seting up to 20 minutes
ini_set('max_execution_time', 300);
..
..
   foreach ($orderPhotos as $photo) {
          $finalUrl = $AwsUrl . $photo['photo_name'];
          $zip->addFromString($photo['order_id'] . '/' . $photo['photo_name'], file_get_contents($finalUrl, false, $ctx));
           $imgZipped++;
            $app['session']->set('zipProgress', array('current' => $imgZipped, 'total' => $totalImagesOrders));
                        $app['session']->save();

   }

The function file_get_content takes the images from AWS bucket and then, these images are added to the zip file.

I look forward to your comments Thanks Carlos