I just set up a django site with nginx and uWSGI. Some pages I go to
work fine, but other fail with a 504 Gateway Time-out. I used to
serve this site with apache and wsgi and these same pages worked fine.

This is what I see in the nginx error log:

2016/08/09 16:40:19 [error] 17345#0: *1 upstream timed out (110:
Connection timed out) while reading response header from upstream,
client: 10.250.147.59, server: localhost, request: "GET
/report/CDSEM/MeasurementData/?group=&target_name=&recipe=&ep=&ppl=&roi_name=&lot=&date_time=8%2F1&tool_ids=23&field_1=Tool&field_2=Target&field_3=Recipe&field_4=Ep&field_5=Lot&field_6=Date+Time&field_7=Bottom&submit_preview=Generate+Report
HTTP/1.1", upstream: "uwsgi://unix:///usr/local/motor/motor.sock",
host: "xx.xx.xx.xx", referrer:
"http://xx.xx.xx.xx/report/CDSEM/MeasurementData/"

When this happens I see this in the uwsgi error log:

Tue Aug 9 16:42:57 2016 -
uwsgi_response_writev_headers_and_body_do(): Broken pipe
[core/writer.c line 296] during GET
/report/CDSEM/MeasurementData/?group=&target_name=&recipe=&ep=&ppl=&roi_name=&lot=&date_time=8%2F1&tool_ids=23&field_1=Tool&field_2=Target&field_3=Recipe&field_4=Ep&field_5=Lot&field_6=Date+Time&field_7=Bottom&submit_preview=Generate+Report
(10.250.147.59)
IOError: write error
[pid: 9230|app: 0|req: 36/155] 10.250.147.59 () {46 vars in 1333
bytes} [Tue Aug 9 16:32:16 2016] GET
/report/CDSEM/MeasurementData/?group=&target_name=&recipe=&ep=&ppl=&roi_name=&lot=&date_time=8%2F1&tool_ids=23&field_1=Tool&field_2=Target&field_3=Recipe&field_4=Ep&field_5=Lot&field_6=Date+Time&field_7=Bottom&submit_preview=Generate+Report
=> generated 0 bytes in 640738 msecs (HTTP/1.1 200) 4 headers in 0
bytes (1 switches on core 0)

Note the weird timestamps. The first uwsgi message is more then 2
minutes after the nginx message. And the second uwsgi message has a
timestamp before the previous uwsgi message. What's up with that??

Here is my nginx config:

worker_processes 1;

events {
worker_connections 1024;
}

http {
include mime.types;
default_type application/octet-stream;
keepalive_timeout 65;
sendfile on;

# set client body size to 20M
client_max_body_size 20M;

include /etc/nginx/sites-enabled/*;
}


and here is my local site file:

# motor_nginx.conf

# the upstream component nginx needs to connect to
upstream django {
server unix:///usr/local/motor/motor.sock; # for a file socket
}

# configuration of the server
server {
# the port your site will be served on
listen 80;
# the domain name it will serve for
server_name localhost;
charset utf-8;

# max upload size
client_max_body_size 75M; # adjust to taste

proxy_read_timeout 600;
proxy_connect_timeout 600;
proxy_send_timeout 600;
send_timeout 600;

# Django media
location /media {
alias /usr/local/motor/motor/media;
}

location /static {
alias /usr/local/motor/motor/static;
}

# Finally, send all non-media requests to the Django server.
location / {
uwsgi_pass django;
include /usr/local/motor/motor/uwsgi_params;
}
}

How can I debug or fix this?

Thanks!

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