Hi all,

We are moving towards hot deployment for our server. For the purpose, we are thinking of having:

- Two instances of JBOSS running at 8080 and 9080. Both in standalone mode.

- Load balanced (with fail over) using nginx.

We are currently facing two problems:

1. We don't want to start deployment until the server instance has no active sessions. We tried to check for number of active sessions associated with a server, but couldn't find a simple commandline method.

Is there any method we can find the number of active sessions, preferrably in jboss-cli?

2. When we undeploy any war file from a server, instead of 502 we are getting 404 error. Is this the expected behaviour?

The overall aim is as follows (hot deployment):

- Wait for active connections to a server to finish.

- Undeploy the war files, let nginx redirect the requests to other server in the mean time.

- Update the war files and start deployment.

Below is the nginx configuration for load balancing:

upstream backend {

        ip_hash;

        server 127.0.0.1:8080;

        server 127.0.0.1:9080;

}

location / {

            root   /home/prancer/dev/LandingPage/;

            index  index.html index.htm;

            add_header 'Access-Control-Allow-Origin' '*';

            try_files $uri $uri/index.html @api;

        }

location @api {

            # Pass to JBOSS Application Server

            proxy_pass http://backend;

            proxy_set_header  X-Real-IP  $remote_addr;

            proxy_set_header Host $http_host;

            proxy_next_upstream     error  timeout  invalid_header  http_404;

            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

            proxy_read_timeout 700;

        }