Error HTTP 405 when Session Starts using load balancing NGINX - apache

Question

I implement Load Balancer using NGINX , but when I try to use some of the webapps developed in Java using Spring Security, when I try to login in one of the apps returns HTTP 405 - Request method 'POST' not supported.
My NGINX conf file like this:
upstream myapp {
server 172.16.80.49:8095;
server 172.16.53.31:8091;
}
server {
listen 80;
location / {
proxy_set_header X-Forwarded-Host $host;
proxy_set_header X-Forwarded-Server $host;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_pass http://172.16.80.49:8092;
}
location /docentes {
proxy_set_header X-Forwarded-Host $host;
proxy_set_header X-Forwarded-Server $host;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_pass http://myapp;
}
location /gerentes {
proxy_set_header X-Forwarded-Host $host;
proxy_set_header X-Forwarded-Server $host;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_pass http://myapp;
}
error_page 500 502 503 504 /50x.html;
location = /50x.html {
root /usr/share/nginx/html;
}
# proxy the PHP scripts to Apache listening on 127.0.0.1:80
#
#location ~ \.php$ {
# proxy_pass http://127.0.0.1;
#}
# pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
#
#location ~ \.php$ {
# root html;
# fastcgi_pass 127.0.0.1:9000;
# fastcgi_index index.php;
# fastcgi_param SCRIPT_FILENAME /scripts$fastcgi_script_name;
# include fastcgi_params;
#}
# deny access to .htaccess files, if Apache's document root
# concurs with nginx's one
#
#location ~ /\.ht {
# deny all;
#}
}
how i can solve this, I suppose the app the problem would be csrf token

Answer 1

Change my cof to:
upstream myapp {
ip_hash;
server 172.16.80.49:8095;
server 172.16.53.31:8091;
}
server {
listen 80;
location / {
proxy_pass http://172.16.80.49:8092;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header Host $http_host;
}
location /docentes {
proxy_pass http://myapp;
proxy_set_header Host $host;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-Proto $scheme;
}
location /gerentes {
proxy_pass http://myapp;
proxy_set_header Host $host;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-Proto $scheme;
}
location /dashboard {
proxy_pass http://myapp;
proxy_set_header Host $host;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-Proto $scheme;
}
error_page 500 502 503 504 /50x.html;
location = /50x.html {
root /usr/share/nginx/html;
}
}