Debugging Memory Leaks in Java NIO Systems
Debugging Memory Leaks in Java NIO Systems

Debugging Memory Leaks in Java NIO Systems

Author
Shiv Bade
Tags
nio
memory leak
Published
September 10, 2016
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One of our systems with heavy NIO usage showed gradual memory leaks.
Root cause: - Direct byte buffers not released properly - Missing Cleaner references in old JDK
Tools used: - jcmd and jmap - Eclipse MAT - Manual tracking of buffer allocations
Lesson: Off-heap memory is not magic — it leaks too.