请教一个 nginx 请求方面的问题

我用 gunicorn+django 部署了一个项目。前端页面调接口 nginx 提示 error:

[alert] 8#8: *12811 zero size buf in writer t:1 r:1 f:0 000056152536F2F0 000056152536F2F0-000056152536F2F0 0000000000000000 0-0 while sending to client 

nginx 配置如下：

 ssl_certificate conf.d/letsencrypt/3481255__bolineyecare.com.pem; ssl_certificate_key conf.d/letsencrypt/3481255__bolineyecare.com.key; ssl_session_timeout 5m; ssl_ciphers ECDHE-RSA-AES128-GCM-SHA256:ECDHE:ECDH:AES:HIGH:!NULL:!aNULL:!MD5:!ADH:!RC4; ssl_protocols TLSv1 TLSv1.1 TLSv1.2; ssl_prefer_server_ciphers on; charset utf-8; expires +0d; add_header Pragma "no-cache"; root /usr/share/nginx/html/collets_web/dist; client_max_body_size 2000m; client_body_buffer_size 2000m; proxy_read_timeout 20m; gzip on; gzip_min_length 4k; gzip_buffers 4 16k; gzip_comp_level 6; gzip_types text/plain application/x-Javascript text/css application/xml application/Javascript application/json; gzip_vary on; gzip_http_version 1.1; # rewrite ^/$ /admin/ last; location /api/purchasing/ { proxy_pass http://127.0.0.1:9527/api/purchasing/; proxy_redirect off; proxy_set_header Host $host; proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; add_header Cache-Control no-store; client_max_body_size 2000m; } 

这两天 baidu 、google 都还没有找到问题。有一种说法是数据的问题。