如果正文太大,Nginx / Uwsgi / Flask POST会超时

我正在使用基于https://github.com/tiangolo/uwsgi-nginx-flask-docker/tree/master/python3.6的dockerimage.我正在运行一个接受POST的python应用程序,对json主体进行一些处理,然后返回一个简单的json响应.像这样的帖子：

curl -H "Content-Type: application/json" -X POST http://10.4.5.168:5002/test -d '{"test": "test"}'

工作良好.但是,如果我发布了一个更大的json文件,我会得到一个504：Gateway Timeout.

curl -H "Content-Type: application/json" -X POST http://10.4.5.168:5002/test -d @some_6mb_file.json

我觉得Nginx和Uwsgi之间的通信存在问题,但我不确定如何修复它.

编辑：我跳入docker容器并手动重新启动Nginx以获得更好的日志记录.我收到以下错误：

2018/12/21 20:47:45 [error] 611#611: *1 upstream timed out (110:
Connection timed out) while reading response header from upstream,
client: 10.4.3.168, server: , request: “POST
/model/refuel_verification_model/predict HTTP/1.1”, upstream:
“uwsgi://unix:///tmp/uwsgi.sock”, host: “10.4.3.168:5002”

从容器内部开始,我开始使用我的Flask应用程序的第二个实例,在没有Nginx和Uwsgi的情况下运行,它运行良好.响应大约需要5秒钟(由于数据的处理时间.)

配置：

/etc/Nginx/Nginx.conf：

user  Nginx;
worker_processes 1;

error_log  /var/log/Nginx/error.log warn;
pid        /var/run/Nginx.pid;


events {
    worker_connections  1024;
}


http {
    include       /etc/Nginx/mime.types;
    default_type  application/octet-stream;

    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
                      '$status $body_bytes_sent "$http_referer" '
                      '"$http_user_agent" "$http_x_forwarded_for"';

    access_log  /var/log/Nginx/access.log  main;

    sendfile        on;
    #tcp_nopush     on;

    keepalive_timeout  65;

    #gzip  on;

    include /etc/Nginx/conf.d/*.conf;
}
daemon off;

/etc/Nginx/conf.d/Nginx.conf：

server {
    listen 80;
    location / {
        try_files $uri @app;
    }
    location @app {
        include uwsgi_params;
        uwsgi_pass unix:///tmp/uwsgi.sock;
    }
    location /static {
        alias /app/static;
    }
}

/etc/Nginx/conf.d/upload.conf：

client_max_body_size 128m;
client_body_buffer_size 128m;

解决方法:

Tensorflow存在问题.我在应用程序初始化期间加载了tensorflow模型,然后尝试使用它.由于Web服务器完成的线程和Tensorflow的“非线程安全”特性,处理挂起导致超时.