The get request of nginx agent only returns part of the data. The problem is solved

Problem description ： The interface on the server sometimes has data , Sometimes there is no data , Through the analysis of , When you find a large amount of data ,get The data returned by the request is often only part of , No problem with other environments , It shouldn't be a code problem , Because the server uses nginx agent , The suspicion is nginx There's something wrong with the configuration
The screening process ：

1. Login server , Direct operation nginx command , Found that the command does not exist , So it runs ps -ef | grep nginx find nginx process , Find from nginx The specific path of the command , On my server nginx The path of is /usr/sbin/nginx
2. function sudo /usr/sbin/nginx -t Locate the location of the configuration file , Here is /etc/nginx/nginx.conf
3. Open profile , find error_log The location of , Check the error log
4. Find the following information open() "/var/lib/nginx/tmp/proxy/7/02/0000000027" failed (13: Permission denied),
5. The reasons are as follows ： because get The amount of data obtained is too large ,nginx File cache used , then , Because you don't have permission to cache files , Cache failed , Data loss

resolvent ： Check /var/lib/nginx/tmp route , Found that its owner is nginx, We changed the user in the configuration file , Cause no permission . modify /etc/nginx/nginx.conf, take user Change it to nginx, then reload that will do .