Nginx session missing problem handling solution

The session missing problem can occur in the path of a reverse proxy tomcat using nginx. Every time you send a request, JESSIONID changes, meaning that the session formed in the previous request is lost, and a new session is created.

Case 1:

 server{
    listen 80;
    server_name www.jiahemdata.com www.jiahemdata.cn;
    charset utf-8;
    location /{
      proxy_redirect off;
      proxy_pass http://127.0.0.1:8093;
      proxy_set_header Host $host;
      proxy_set_header Referer $http_referer ; 
      proxy_set_header X-Real-Ip $remote_addr;
      proxy_set_header  X-Forwarded-For  $proxy_add_x_forwarded_for;
    }
    access_log logs/tomcat_access.log;
  }

Since the current nginx is only listening on one port and no path is set, the problem of session loss will not occur in 1.

Case 2:

 server{
    listen 80;
    server_name www.jiahemdata.com www.jiahemdata.cn;
    root /opt/tomcat-jhyx/webapps/jhyx/;
    charset utf-8;
    location /{
      proxy_pass http://127.0.0.1:8093/jhyx/;
      proxy_set_header Host $host;
      proxy_set_header Referer $http_referer ; 
      proxy_set_header X-Real-Ip $remote_addr;
      proxy_set_header  X-Forwarded-For  $proxy_add_x_forwarded_for;
    }
    access_log logs/tomcat_access.log;
  }

In this case, specifying a folder for tomcat, rather than just one port listener, will cause each request to change, causing session to be lost.

Case 3:

 server{
    listen 80;
    server_name www.jiahemdata.com www.jiahemdata.cn;
    root /opt/tomcat-jhyx/webapps/jhyx/;
    charset utf-8;
    location /{
      proxy_redirect off;
      proxy_pass http://127.0.0.1:8093/jhyx/;
      proxy_cookie_path /jhyx/ /; // Set up the cookie Path so that it does not change every time a request occurs. 
      proxy_cookie_path /jhyx /;
      proxy_set_header Host $host;
      proxy_set_header Referer $http_referer;
      proxy_set_header X-Real-Ip $remote_addr;
      proxy_set_header  X-Forwarded-For  $proxy_add_x_forwarded_for;
    }
    access_log logs/tomcat_access.log;
  }

At this moment, you find that your problem is still unresolved. At this moment, you are thinking, I have already set the cookie path, why not? That is because you did not send cookie when you asked.

Case 4:

 server{
    listen 80;
    server_name www.jiahemdata.com www.jiahemdata.cn;
    root /opt/tomcat-jhyx/webapps/jhyx/;
    charset utf-8;
    location /{
      proxy_redirect off;
      proxy_pass http://127.0.0.1:8093/jhyx/;
      proxy_cookie_path /jhyx/ /;
      proxy_cookie_path /jhyx /;
      proxy_set_header Host $host;
      proxy_set_header Referer $http_referer;
      proxy_set_header Cookie $http_cookie;  // Request is sent with cookie information 
      proxy_set_header X-Real-Ip $remote_addr;
      proxy_set_header  X-Forwarded-For  $proxy_add_x_forwarded_for;
    }
    access_log logs/tomcat_access.log;
  }

I hope you find a correct solution in the vast network.