sails.js socket.io通过nginx显示了很多'上游超时'

我正在运行两个sails.js后端实例后面的nginx代理与粘滞会话。

我一直在我的nginx error.log中看到很多关于sails.js /socket.io/ URL的消息超时：

2016/01/04 20:55:15 [error] 12106#12106: *402088 upstream timed out (110: Connection timed out) while reading response header from upstream, client: xxxx, server: example.com, request: "GET /socket.io/?__sails_io_sdk_version=0.11.0&__sails_io_sdk_platform=browser&__sails_io_sdk_language=javascript&EIO=3&transport=polling&t=1451930055065-4&sid=jvekCYDAcFfu0PLdAAL6 HTTP/1.1", upstream: "http://127.0.0.1:3001/socket.io/?__sails_io_sdk_version=0.11.0&__sails_io_sdk_platform=browser&__sails_io_sdk_language=javascript&EIO=3&transport=polling&t=1451930055065-4&sid=jvekCYDAcFfu0PLdAAL6", host: "example.com", referrer: "https://example.com/languageExchange/chat/63934" 2016/01/04 20:55:17 [error] 12105#12105: *402482 upstream prematurely closed connection while reading response header from upstream, client: yyyy, server: example.com, request: "GET /socket.io/?__sails_io_sdk_version=0.11.0&__sails_io_sdk_platform=browser&__sails_io_sdk_language=javascript&EIO=3&transport=websocket&sid=QnAe1jiKEHgj-zlKAAKu HTTP/1.1", upstream: "http://127.0.0.1:3001/socket.io/?__sails_io_sdk_version=0.11.0&__sails_io_sdk_platform=browser&__sails_io_sdk_language=javascript&EIO=3&transport=websocket&sid=QnAe1jiKEHgj-zlKAAKu", host: "example.com" 2016/01/04 22:32:33 [error] 12107#12107: *437054 no live upstreams while connecting to upstream, client: zzzz, server: example.com, request: "GET /socket.io/?__sails_io_sdk_version=0.11.0&__sails_io_sdk_platform=browser&__sails_io_sdk_language=javascript&EIO=3&transport=websocket&sid=8G2TfOsNOJMYHZOjAAD3 HTTP/1.1", upstream: "http://sails/socket.io/?__sails_io_sdk_version=0.11.0&__sails_io_sdk_platform=browser&__sails_io_sdk_language=javascript&EIO=3&transport=websocket&sid=8G2TfOsNOJMYHZOjAAD3", host: "example.com" 

这不是每个客户都会发生的，但是这些信息的数量是很重要的。 而sails.js不显示任何相关的错误。

我应该如何调查这些问题的性质？

• 用于Meteor部署的Nginxconfiguration
• 外部http连接失败（端口打开）
• Rails将协议设置为始终HTTP
• 在AWS上部署Docker的Elastic Beanstalk失败
• 检测HLSaudiocanplay事件

这是我到目前为止所尝试的（而且没有帮助）：

• 将socket.io客户端升级到最新版本（1.3.7）
• 显式closuresnginx中/socket.io/请求的caching

这里是相关的configuration文件：

帆sockets.js：

 adapter: 'socket.io-redis' 

nginx的：

  location ^~ /socket.io/ { proxy_pass http://sails; proxy_http_version 1.1; proxy_set_header Upgrade $http_upgrade; proxy_set_header Connection $connection_upgrade; proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_set_header Host $http_host; proxy_no_cache true; proxy_cache_bypass true; proxy_redirect off; proxy_intercept_errors off; }