Bin's Tech Cabin

Mar 18, 2022 · Backend Development

Uncovering Netty’s Hidden Memory Leak: A Deep Dive into the Recycler Object Pool

This article reveals a subtle memory‑leak bug in Netty 4.1.56.Final’s Recycler object pool, explains its intricate lock‑free design for object allocation and recycling across threads, and walks through the discovery, analysis, and eventual fix of the issue.