ThreadLocal & Memory Leak

Question

It is mentioned at multiple posts: improper use of ThreadLocal causes Memory Leak. I am struggling to understand how Memory Leak would happen using Thread

Answer 1

The previous posts explain the problem but don't provide any solution. I found that there is no way to "clear" a ThreadLocal. In a container environment where I'm handling requests, I finally just called .remove() at the end of every request. I realize that could be problematic using container managed transactions.