Which issue is NOT commonly associated with Java memory leaks?

Proper cache usage is not commonly associated with Java memory leaks when implemented correctly. Caching, when managed appropriately, can improve performance by storing frequently accessed data in memory rather than repeatedly fetching it from slower storage. However, it is essential to implement caching with specific considerations, such as setting appropriate expiration times and eviction policies to avoid growing memory consumption.

In contrast, issues like wrong implementation of equals/hashcode can lead to objects not being correctly identified during garbage collection, thereby preventing them from being removed from memory, which can create memory leaks. Thread local variables can also lead to memory leaks if they are not managed properly, as they can retain references to objects in memory for longer than necessary. Mutable static fields and collections present risks as their state can lead to unintended retention of objects, again contributing to memory leaks.