In Java, we commonly use static, instance (member), and local variables. Occasionally, we use ThreadLocal variables. When a variable is declared as ThreadLocal, it will only be visible to that particular thread. ThreadLocal variables are extensively used in frameworks such as Log4J and Hibernate. If these ThreadLocal variables aren’t removed after their use, they will accumulate in memory and have the potential to trigger an OutOfMemoryError.
In this post, let’s learn how to troubleshoot memory leaks that are caused by ThreadLocal variables.
