django nginx 502 Bad Gateway

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按照这位大佬部署nginx 和uwsgi其实是没有问题。
但我经常报错
错误日志：

upstream prematurely closed connection while reading response header from upstream

检查nginx.conf的配置信息

worker_processes  1;
events {
worker_connections  <span class="token number">1024</span><span class="token punctuation">;</span>

}
http {
include       mime<span class="token punctuation">.</span>types<span class="token punctuation">;</span>

default_type  application<span class="token operator">/</span>octet<span class="token operator">-</span>stream<span class="token punctuation">;</span>

sendfile        on<span class="token punctuation">;</span>

server <span class="token punctuation">{<!-- --></span>

    listen       <span class="token number">80</span><span class="token punctuation">;</span>

    server_name  <span class="token number">120.25</span><span class="token number">.151</span><span class="token number">.138</span><span class="token punctuation">;</span>

    charset utf<span class="token operator">-</span><span class="token number">8</span><span class="token punctuation">;</span>

    location <span class="token operator">/</span> <span class="token punctuation">{<!-- --></span>

       include uwsgi_params<span class="token punctuation">;</span>

       uwsgi_pass <span class="token number">127.0</span><span class="token number">.0</span><span class="token number">.1</span><span class="token punctuation">:</span><span class="token number">8997</span><span class="token punctuation">;</span>

       uwsgi_param UWSGI_SCRIPT HouseSellSystem4<span class="token punctuation">.</span>wsgi<span class="token punctuation">;</span>
       
       uwsgi_param UWSGI_CHDIR <span class="token operator">/</span>usr<span class="token operator">/</span>local<span class="token operator">/</span>Python<span class="token operator">-</span><span class="token number">3.6</span><span class="token number">.6</span><span class="token operator">/</span>data<span class="token operator">/</span>wwwroot<span class="token operator">/</span>HouseSellSystem4<span class="token operator">/</span><span class="token punctuation">;</span>



    <span class="token punctuation">}</span>

    location <span class="token operator">/</span>static<span class="token operator">/</span> <span class="token punctuation">{<!-- --></span>

    alias <span class="token operator">/</span>usr<span class="token operator">/</span>local<span class="token operator">/</span>Python<span class="token operator">-</span><span class="token number">3.6</span><span class="token number">.6</span><span class="token operator">/</span>data<span class="token operator">/</span>wwwroot<span class="token operator">/</span>HouseSellSystem4<span class="token operator">/</span>static<span class="token operator">/</span><span class="token punctuation">;</span>

    <span class="token punctuation">}</span>

<span class="token punctuation">}</span>

}

再检查uwsgi信息

<uwsgi>
<socket>127.0.0.1:8997</socket><!-- 内部端口，自定义 -->
<chdir>/usr/local/Python-3.6.6/data/wwwroot/HouseSellSystem4/</chdir><!-- 项目路径 -->
<module>HouseSellSystem4.wsgi</module>
<processes>4</processes> <!-- 进程数 -->
<daemonize>uwsgi.log</daemonize><!-- 日志文件 -->
</uwsgi>

解决方法

先用killall uwsgi ，再重启uwsgi -x HouseSellSystem4.xml然后重启nginx