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Bin's Tech Cabin

Original articles dissecting source code and sharing personal tech insights. A modest space for serious discussion, free from noise and bureaucracy.

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Latest from Bin's Tech Cabin

38 recent articles

Bin's Tech Cabin

Apr 8, 2022 · Backend Development

Inside Netty's Write and Flush Mechanism: How Java Handles Network I/O

This article provides a detailed walkthrough of Netty's internal write and flush processes, explaining how ChannelHandlerContext propagates outbound events, how ChannelOutboundBuffer manages pending data with high/low watermarks, the role of write loops, OP_WRITE handling, and the combined writeAndFlush operation in Java's high‑performance network framework.

Flushnetwork-iowrite()

0 likes · 70 min read

Inside Netty's Write and Flush Mechanism: How Java Handles Network I/O

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.

JavaMemory LeakNetty

0 likes · 93 min read

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

Bin's Tech Cabin

Mar 4, 2022 · Fundamentals

Why Java Objects Need Memory Alignment: Deep Dive into JVM Layout, False Sharing, and Compressed Oops

This article explains how Java objects are laid out in the JVM heap, why fields are reordered and padded for alignment, how false sharing degrades performance, and how the @Contended annotation and compressed oops help mitigate these issues, all backed by detailed diagrams and code examples.

JVMJavaMemory Layout

0 likes · 56 min read

Why Java Objects Need Memory Alignment: Deep Dive into JVM Layout, False Sharing, and Compressed Oops

Bin's Tech Cabin

Feb 23, 2022 · Backend Development

How Netty’s Sub‑Reactor Efficiently Handles OP_READ Events and Dynamically Adjusts ByteBuffer Size

This article explains the complete flow of how Netty's Sub‑Reactor processes OP_READ events, from selector polling to channel pipelines, and details the adaptive mechanisms of AdaptiveRecvByteBufAllocator and PooledByteBufAllocator that dynamically resize DirectByteBuffers for optimal network data reception.

AdaptiveRecvByteBufAllocatorByteBufferNetty

0 likes · 36 min read

How Netty’s Sub‑Reactor Efficiently Handles OP_READ Events and Dynamically Adjusts ByteBuffer Size

Bin's Tech Cabin

Feb 11, 2022 · Backend Development

Why Netty’s Connection Handling Slows Down – Inside the OP_ACCEPT Bug and Fix

This article dissects Netty’s core connection‑acceptance mechanism, explains how the OP_ACCEPT event is processed, reveals a subtle bug that limits read loops to a single connection, and shows the fix introduced in version 4.1.69.final, offering developers a complete understanding of Netty’s reactor architecture.

Bug FixJava NIONetty

0 likes · 40 min read

Why Netty’s Connection Handling Slows Down – Inside the OP_ACCEPT Bug and Fix

Bin's Tech Cabin

Jan 28, 2022 · Backend Development

Unveiling Netty's Reactor Core: How It Efficiently Manages I/O Events and Asynchronous Tasks

This article delves into Netty's Reactor architecture, explaining its event loop, I/O event handling, task scheduling, and strategies for overcoming JDK NIO Epoll bugs, offering developers deep insights into high-performance network programming.

Asynchronous Tasksio-event-handling

0 likes · 50 min read

Unveiling Netty's Reactor Core: How It Efficiently Manages I/O Events and Asynchronous Tasks

Bin's Tech Cabin

Jan 19, 2022 · Backend Development

Deep Dive into Netty Server Startup: From Channel Creation to Reactor Binding

Explore the comprehensive step-by-step process of Netty server startup, covering channel creation, initialization, reactor registration, and binding, while demystifying the asynchronous flow and internal mechanisms that power high-performance network applications.

JavaNettyReactor Pattern

0 likes · 42 min read

Deep Dive into Netty Server Startup: From Channel Creation to Reactor Binding

Bin's Tech Cabin

Jan 13, 2022 · Backend Development

How Netty Builds Its Reactor Thread Pool: Deep Dive into NioEventLoopGroup

This article explains how Netty constructs its core reactor thread pool using NioEventLoopGroup, detailing the creation of boss and worker groups, the underlying selector optimization, task queue setup, and the round‑robin binding strategy that distributes channels across multiple event loops for high‑performance I/O handling.

IO multiplexingJava NIONetty

0 likes · 39 min read

How Netty Builds Its Reactor Thread Pool: Deep Dive into NioEventLoopGroup