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liandk
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liandk

Seasoned Java and mobile developer with years of experience, specializing in mini‑programs, public accounts, and full‑stack front‑end development. In the AI era, I continuously learn to broaden my knowledge and evolve. I revived a public account I started a decade ago during a dessert‑startup venture, using code as a vessel and knowledge as a companion. I share personal projects, technical articles, programming tips, and growth insights—let’s improve together and set sail.

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Recent Articles

Latest from liandk

100 recent articles max
liandk
liandk
Sep 18, 2026 · Backend Development

Hidden GC Pauses Causing Random API Timeouts: JVM STW Troubleshooting Guide

This article reveals how long GC stop-the-world pauses cause random API timeouts without errors, detailing two fault scenarios, a four-step GC log analysis SOP with specific JVM flags, four root causes including young generation sizing and memory fragmentation, and optimization strategies from emergency restarts to G1/ZGC upgrades with monitoring alerts.

Full GCG1GC
0 likes · 15 min read
Hidden GC Pauses Causing Random API Timeouts: JVM STW Troubleshooting Guide
liandk
liandk
Sep 18, 2026 · Backend Development

Java Production Troubleshooting: Universal SOP & 10 Failure Cheat Sheet

This series finale presents a universal 6-step SOP for Java production troubleshooting, a bottom-up layered diagnosis model, a quick-reference guide for 10 common failure patterns with symptoms, root causes, and tools, plus five golden principles for incident handling.

ArthasGC AnalysisJVM
0 likes · 16 min read
Java Production Troubleshooting: Universal SOP & 10 Failure Cheat Sheet
liandk
liandk
Sep 16, 2026 · Databases

Slow SQL Full-Chain Troubleshooting: Execution Plans, Index Failures & Lock Contention

This comprehensive guide covers the complete slow SQL troubleshooting lifecycle: enabling slow query logs, interpreting EXPLAIN plans, diagnosing nine common index failure patterns, resolving transaction lock contention, and applying architectural optimizations for large datasets, plus emergency mitigation and long-term governance practices.

MySQLSQL tuningSlow SQL
0 likes · 16 min read
Slow SQL Full-Chain Troubleshooting: Execution Plans, Index Failures & Lock Contention
liandk
liandk
Sep 15, 2026 · Databases

MySQL MGR Cluster: Paxos Consensus, Zero-Downtime HA & Brain-Split Proof Architecture

This article explains MySQL Group Replication (MGR), a native high-availability cluster based on Paxos consensus, covering its architecture, single-primary vs multi-primary modes, automatic failover, brain-split prevention via majority voting, production deployment rules, and common pitfalls to avoid for zero-data-loss transactional systems.

Brain SplitDatabase ClusteringGroup Replication
0 likes · 12 min read
MySQL MGR Cluster: Paxos Consensus, Zero-Downtime HA & Brain-Split Proof Architecture
liandk
liandk
Sep 14, 2026 · Backend Development

Java Thread Deadlock & Pool Exhaustion: Production Troubleshooting Guide

This guide covers real-world diagnosis and resolution of Java thread deadlocks and thread pool exhaustion — the two most common causes of service hangs with zero errors — using jstack, Arthas, and thread-state analysis to pinpoint root causes and apply permanent fixes.

ArthasProduction Troubleshootingjava
0 likes · 13 min read
Java Thread Deadlock & Pool Exhaustion: Production Troubleshooting Guide
liandk
liandk
Sep 13, 2026 · Backend Development

Java CPU 100% Spike: Complete Production Troubleshooting & Root Cause Analysis

This article provides a comprehensive guide to troubleshooting Java CPU 100% spikes in production, covering root cause categories, a standard SOP using top, jstack, and thread analysis, a real-world infinite loop case study, GC-related CPU issues, emergency mitigation steps, and long-term prevention practices.

CPU troubleshootinggarbage collectioninfinite loop
0 likes · 13 min read
Java CPU 100% Spike: Complete Production Troubleshooting & Root Cause Analysis
liandk
liandk
Sep 12, 2026 · Operations

Java Server Troubleshooting: 5 Essential Linux Commands for Root-Cause Analysis

This guide details five essential Linux commands—top, free, df, netstat, and tcpdump—for diagnosing server-level CPU, memory, disk, and network bottlenecks that cause Java application failures, providing field interpretations, anomaly thresholds, and a step-by-step troubleshooting workflow.

Java performanceLinuxdf
0 likes · 14 min read
Java Server Troubleshooting: 5 Essential Linux Commands for Root-Cause Analysis
liandk
liandk
Sep 11, 2026 · Databases

MySQL Master-Slave Replication: Sync Principles, Delay Fixes, Read-Write Splitting & Failover

This article provides a comprehensive practical guide to MySQL master-slave replication, covering synchronization principles, three replication modes, delay causes and troubleshooting, read-write splitting implementation with common pitfalls, failover strategies, and five production pitfalls to avoid.

Database High AvailabilityDatabase ReplicationFailover
0 likes · 12 min read
MySQL Master-Slave Replication: Sync Principles, Delay Fixes, Read-Write Splitting & Failover