Session attribute not persisting which is setting at HttpSessionListener using Spring Session Data Redis

Session attributes are missing/not able to fetch which are setting at HttpSessionListener

I want to set some attributes to session when session is created using HttpSessionListener, and I want to validate that attribute in the next level.

To Reproduce
After installing redis just install on localhost and default port, build and run the project shared on github.

Expected behavior
What ever attributes I am setting on session creation HttpSessionListener

 public void sessionCreated(HttpSessionEvent httpSessionEvent){
        HttpSession httpSession = httpSessionEvent.getSession();
       System.out.println("inside listner class ====");
        httpSession.setAttribute("testKey","testValue");

       System.out.println("test value inside listner===>"+httpSession.getAttribute("testKey"));
    }

here I am able to fetch the session atrribute testKey, but after this when flow goes to servlet, I am not getting the attribute
Sample

I have attached the code in this link