spring.session.redis.namespace Spring property has no effect in a Spring Boot 3.5.0 based application

[carlbjor]

Describe the bug

spring.session.redis.namespace Spring (Boot) property has no effect when using Spring Boot/Spring Session 3.5.0

This approach works:

@EnableRedisHttpSession(redisNamespace = "customnamespace:spring:session")

To Reproduce

Set spring.session.redis.namespace=customnamespace:spring:session in the Spring Boot application.properties file

Check redis keys using redis-cli, for example keys *. End result is that the key does not start with customnamespace

Expected behavior

key in redis starting with customnamespace:spring:session

As the guide states it should work, if I can read the manual: https://docs.spring.io/spring-session/reference/configuration/redis.html#using-a-different-namespace

Sample
None

[carlbjor]

"The (Spring Boot) servlet auto-configuration replaces the need to use @EnableRedisHttpSession."

• It gets a bit confusing if you do not thoroughly read the correct documentation pages

So, this relates to spring-projects/spring-boot#15757