DSXchange

Everytime when I login Director in windows to connect to remote server 11.3 on unix, will be promted "The client session to the service Tier is lost .Attempting to re-establish session", the window will show again if I tried to close it.
What's the issue and how to resolve it?

Make sure that the required services, particularly the dsrpcd process, are running on the server machine.

Have a network specialist monitor your network for dropouts.

Most likely is because the designer/director sessions are left open overnight...and sometimes your only option is to kill the session and re-start the designer/director. Best practice to avoid the issue is not leaving sessions of designer or director open overnight

The root cause is the lifespan of the security token generated on the service tier (WAS) for each user connection, the default value is 12 hours. When DataStage Designer/Director are left open overnight the token expires

You need to update the client to 11.3.1.2