My Easy Redmine menampilkan 502 Bad Gateway
There are many possible causes of this error. Here are a few tips:
- browser cache problem - try deleting cache from the browser
- dns problem
- server setting problem
First check your connection and network (verify that server is reachable by using a ping command or traceroute command). Firewall server side.
If all above seems fine, try to get some information from nginx error.logs. Check nginx error.log at the server side - /var/log/nginx/error.log
Double check that your nginx configuration matches the standard. Standard nginx configuration can be found here:
https://www.redmine.org/projects/redmine/wiki/HowTo_configure_Nginx_to_run_Redmine
Example of an nginx configuration (as is used by Easy Software). It's quite similar to official one only few variables are optimized:
user www-data;
worker_processes 8;
worker_rlimit_nofile 60000;
error_log /var/log/nginx/error.log;
pid /var/run/nginx.pid;
events {
worker_connections 10240;
# multi_accept on;
}
http {
ssl_protocols TLSv1 TLSv1.1 TLSv1.2; # dont use SSLv3 ref: POODLE
include /etc/nginx/mime.types;
default_type application/octet-stream;
server_names_hash_bucket_size 2048;
access_log /var/log/nginx/access.log;
sendfile on;
#tcp_nopush on;
#keepalive_timeout 0;
keepalive_timeout 65;
tcp_nodelay on;
send_timeout 1800;
client_body_timeout 1800;
client_header_timeout 1800;
proxy_read_timeout 1800;
client_max_body_size 220m;
fastcgi_buffer_size 64K;
fastcgi_buffers 128 16k;
proxy_max_temp_file_size 0;
types_hash_max_size 4096;
types_hash_bucket_size 128;
proxy_busy_buffers_size 256k;
proxy_buffers 8 256k;
proxy_buffer_size 256k;
gzip on;
gzip_disable "MSIE [1-6]\.(?!.*SV1)";
include /etc/nginx/conf.d/*.conf;
include /etc/nginx/sites-enabled/*;
include /etc/nginx/sites-auto/*;
}
Other possible causes of 502 error include...
Unicorn is not running at all, due to
- Insufficient permissions
- Wrong version of passenger
- Wrong Ruby version
- Missing gems
- Broken filesystem
To find out the exact problem, you need to check error logs in unicorn or apache + application log from Easy Redmine (log/production.log)
Timeout
If low timeout is configured, this error will appear on:
- large exports
- overload of server
- rake tasks run from the GUI
Limit of MySQL connections
Make sure you have a sufficient number of connections allowed to MySQL. It depends on the number of users, but you should have at least a 100 allowed.
