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kotlinlang

Spent a whole day on the error "Class A cannot be cast to Class A" when trying to access `@Cacheable` method return value when it clearly should be working since I literally just put the same class instance into the cache when I called the method for the first time 1 second ago...
Couldn't find a single article that helped me on the issue. `mvn clean` didn't help either.
... It worked after I invalidated intellij cache and restarted IDE.
I love my life sometimes.

1. it’s not related to kotlin
2. it probably doesn’t belong to general
3. it’s probably related to a class loading issue. two classes are not the same if they are loaded by two different class loaders