连接时间超时uwsgi/无法连接到节点

负载平衡器后面的uwsgi出现了一些问题，日志已满或消息如下。 我是nginx/uwsgi之类的新手，所以我不知道该去哪里看看

[uwsgi-http] unable to connect() to node "127.0.0.1:55792" (0 retries): Connection timed out
[uwsgi-http] unable to connect() to node "127.0.0.1:55792" (0 retries): Connection timed out
[uwsgi-http] unable to connect() to node "127.0.0.1:55792" (1 retries): Connection timed out
[uwsgi-http] unable to connect() to node "127.0.0.1:55792" (0 retries): Connection timed out
[uwsgi-http] unable to connect() to node "127.0.0.1:55792" (0 retries): Connection timed out
[uwsgi-http] unable to connect() to node "127.0.0.1:55792" (0 retries): Connection timed out
[uwsgi-http] unable to connect() to node "127.0.0.1:55792" (0 retries): Connection timed out
[uwsgi-http] unable to connect() to node "127.0.0.1:55792" (0 retries): Connection timed out
[uwsgi-http key: app.example.com client_addr: 10.133.223.217 client_port: 54217] hr_instance_read(): Connection reset by peer [plugins/http/http.c line 646]

还有这些格式：

[uwsgi-http] unable to connect() to node "127.0.0.1:55792" (0 retries): Connection timed out
Wed Oct  5 07:24:42 2016 - *** uWSGI listen queue of socket "127.0.0.1:55792" (fd: 3) full !!! (257/256) ***
Wed Oct  5 07:24:44 2016 - *** uWSGI listen queue of socket "127.0.0.1:55792" (fd: 3) full !!! (257/256) ***

而且：

connect_to_tcp()/socket(): Too many open files [core/socket.c line 462]
[uwsgi-http] unable to connect() to node "127.0.0.1:55792" (0 retries): Connection timed out
[uwsgi-http] unable to connect() to node "127.0.0.1:55792" (0 retries): Connection timed out
connect_to_tcp()/socket(): Too many open files [core/socket.c line 462]
connect_to_tcp()/socket(): Too many open files [core/socket.c line 462]

有4台具有1gb ram和1个核心的服务器获得此事件。（由数字海洋主持）

如果这有帮助：

cat /proc/sys/fs/file-max -> 1048576

ulimit -n 32768

net.core.somaxconn = 65000

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在我看来，你有太多的开放连接<代码>完整！！！（257/256）***重新启动uwsgi/nginx时会发生什么？重新启动后，我仍然立即得到它：套接字“127.0.0.1:3414”（fd:3）的uwsgi侦听队列已满！！！（257/256）***我将侦听队列增加到512，并再次将其填满。您将生成多少个uwsgi进程？2个进程和2个线程。