【问题标题】:R Plumber API: Prevent "504 Gateway Time-out"R Plumber API:防止“504 网关超时”
【发布时间】:2017-11-21 13:37:16
【问题描述】:

我已经使用plumber 编写了一个 R API 并将其部署到一个数字海洋液滴,就像在instructions 中一样。

我在 .json 数据中发布并期待 .json 数据返回。为此,我使用命令行中的curl 命令,例如:

curl --data @data/data.json http://[API ADDRESS] > results/output.json

当我发布一个小数据集时,这很好用,但随着数据集变大,我开始收到如下 HTTP 错误:

<html>
<head><title>504 Gateway Time-out</title></head>
<body bgcolor="white">
<center><h1>504 Gateway Time-out</h1></center>
<hr><center>nginx/1.10.0 (Ubuntu)</center>
</body>
</html>

我尝试编辑/etc/nginx/nginx.conf 以允许更长的超时和更大的文件,但仍然没有运气。 nginx.conf文件如下:

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

events {
    worker_connections 768;
    # multi_accept on;
}

http {

    ##
    # Basic Settings
    ##

    sendfile on;
    tcp_nopush on;
    tcp_nodelay on;
    keepalive_timeout 3000;
    types_hash_max_size 2048;
    # server_tokens off;

        ##
        # Allow for longer jobs
        ##

        client_header_timeout 3000;
        client_body_timeout 3000;
        fastcgi_read_timeout 3000;
        client_max_body_size 100M;
        fastcgi_buffers 8 128k;
        fastcgi_buffer_size 128k;

    # server_names_hash_bucket_size 64;
    # server_name_in_redirect off;

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

    ##
    # SSL Settings
    ##

    ssl_protocols TLSv1 TLSv1.1 TLSv1.2; # Dropping SSLv3, ref: POODLE
    ssl_prefer_server_ciphers on;

    ##
    # 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/javascript text/xml application/xml application/xml+rss text/javascript;

    ##
    # Virtual Host Configs
    ##

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

}

然后我使用sudo service nginx restart 重新启动 nginx 服务器,但仍然收到超时错误。

/var/log/nginx/error.log 行内容如下:

*4 upstream timed out (110: Connection timed out) while reading response header from upstream, client: [MY IP], server: _, request: "POST [API]", upstream: "http://127.0.0.1:8000/[API]", host: "[HOST ADDRESS]"

任何关于管道工如何在幕后工作的帮助或提示确实非常有用。非常感谢!

【问题讨论】:

    标签: r nginx timeout http-status-code-504 plumber


    【解决方案1】:

    我现在通过在/etc/nginx/sites-available/[my site]/mysite.conf 中添加以下几行来解决此问题

    location {
        # time out settings
        proxy_connect_timeout 3000s;
        proxy_send_timeout   3000;
        proxy_read_timeout   3000;
    }
    

    我还在nginx.conf 中注释掉了keepalive_timout 标志,并在this article 中指定了http 版本,但我不确定究竟是什么造成了不同。如果我发现我会更新答案。

    【讨论】:

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