What is a common cause of high Java memory usage related to HTTP sessions?

High Java memory usage can often be attributed to the use of HTTP sessions as a cache. When HTTP sessions are used to store large amounts of data or objects, it can lead to increased memory consumption, as each session retains its contents for the duration of the user’s interaction with the application. This caching mechanism is convenient for improving performance and backend interactions, but if not managed properly, it can cause memory bloat, especially if many users are active concurrently.

In scenarios where session data grows excessively or is not cleared when no longer needed, the application can quickly exhaust available memory resources, resulting in potential performance degradation or even application crashes. Therefore, it's vital to optimize how HTTP sessions are utilized, ensuring that they are not overloaded with data that could be retrieved or reconstructed from other sources, thus keeping memory usage in check.