I'd say the problem is that you're even dealing with a 2Gb XML file to begin with. XML is designed mostly as a method to exchange data between programs. What it looks like you're doing here is using ...

Diagnose the problem 1. Capture the heap dump A heap dump is a snapshot of what’s in your Java program’s memory at a given point in time. It contains details about objects that are present in memory, ...

This article analyzes the main causes of memory leaks in Java Enterprise Edition (Java EE) applications, and suggests strategies for detecting them.