Rails + Puma + Nginx每隔几天Bad Gateway 502

我有一个运行在Nginx上的Puma应用程序，像Puma一样，每隔两天，应用程序就会出现502 Bad Gateway错误。

我的nginx日志包含很多像这样的错误：

2015/07/23 14:43:49 [error] 14044#0: *7036 connect() to unix:///var/www/myapp/myapp_app.sock failed (111: Connection refused) while connecting to upstream, client: 12.123.12.12, server: myapp.com, request: "GET /arrangements HTTP/1.1", upstream: "http://unix:///var/www/myapp/myapp_app.sock:/arrangements", host: "myapp.com", referrer: "http://myapp.com/arrangements" 

我必须重新启动彪马，一切都可以再次运行…几天。

任何想法如何我可以解决这个问题？ 我更新nginx和美洲狮。

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/etc/nginx/sites-enabled/myapp.com

 upstream myapp { server unix:///var/www/myapp/myapp_app.sock; } server { listen 80; server_name myapp.com; root /var/www/myapp/current/public; client_max_body_size 20M; location ~ \.php$ { try_files $uri =404; fastcgi_pass unix:/var/run/php5-fpm.sock; fastcgi_index index.php; fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name; include fastcgi_params; allow all; satisfy any; } location / { proxy_pass http://myapp; # match the name of upstream directive which is defined above proxy_set_header Host $host; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; } location ~* ^/assets/ { # Per RFC2616 - 1 year maximum expiry expires 1y; add_header Cache-Control public; # Some browsers still send conditional-GET requests if there's a # Last-Modified header or an ETag header even if they haven't # reached the expiry date sent in the Expires header. add_header Last-Modified ""; add_header ETag ""; break; } }