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.
This guide covers the top 10 Nginx and API gateway production faults—including 502/504 errors, retry storms, load imbalance, rate limiting failures, CORS issues, and 499 errors—with root cause analysis, configuration fixes, and a step-by-step SOP for rapid diagnosis and long-term prevention.
This comprehensive guide covers the five critical MQ production failures — message loss, duplicate consumption, massive backlog, consumer hangs, and dead letter queue blocking — with root cause analysis, emergency mitigation steps, and long-term architectural fixes for RocketMQ, Kafka, and RabbitMQ.
This article details eight high-frequency Redis production faults—cache penetration, breakdown, avalanche, big keys, hot keys, connection exhaustion, memory OOM, and consistency issues—providing symptoms, root causes, troubleshooting commands, solutions, and a universal SOP for rapid diagnosis and resolution.
This comprehensive guide covers 10 hidden Java memory leak scenarios, a 6-step MAT-based investigation SOP, code-level fixes for ThreadLocal and static collections, emergency mitigation tactics, and long-term prevention standards to eliminate recurring OOM crashes.
This article provides a standardized JVM tuning methodology with three production-ready parameter templates for low (2C4G), mid (8C16G), and high (16C32G+) spec servers, covering G1 and ZGC configurations, common pitfalls, and verification steps.
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.
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.
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.
This comprehensive guide covers four Java OOM types (heap, metaspace, stack, direct memory), details enterprise troubleshooting SOP using jmap and MAT analysis, identifies five common memory leak root causes, and provides a six-step production emergency response plus long-term prevention rules.
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.
