Incorrect Cache Key Generation when (hidden) static methods are used

[fibsifan]

Hello,

When static methods are used for cache key creation and 2 static methods have the same signature in a class inheritance hierarchy, then only one static method is used for cache key generation. I created a small example project: https://github.com/fibsifan/spring-cache-error

The most relevant part is in the Controller:

    @Cacheable(cacheNames = "cachedController", key = "T(de.jball.spring.caching.keys.ParentCacheKeyGenerator).getCacheKey()")
    @GetMapping("parent")
    public String getResponseWithParentCacheKey() {
        return "ResponseWithParentCacheKey";
    }

    @Cacheable(cacheNames = "cachedController", key = "T(de.jball.spring.caching.keys.ChildCacheKeyGenerator).getCacheKey()")
    @GetMapping("child")
    public String getResponseWithChildCacheKey() {
        return "ResponseWithChildCacheKey";
    }

If GET http://localhost:8080/parent is called first, then calls to /child always return ResponseWithParentCacheKey and vice versa.

[fibsifan]

I was able to check Spring versions 6.2.10 and 6.2.11.

[sbrannen]

Hi @fibsifan,

Congratulations on submitting your first issue for the Spring Framework! 👍

I verified that your sample application demonstrates the behavior you have described; however, I have yet to reproduce it in local integration tests without Spring Boot and Tomcat involved. So, we will investigate further and get back to you.

[sbrannen]

In case someone else gets a chance to investigate this further before I do, I have pushed related tests to the following branch.

main...sbrannen:spring-framework:issues/gh-35667-cache-key-generation-from-static-methods