Experienced in Java and Python, we share and learn together. For submissions or collaborations, DM us.
The article walks through a real incident where a scheduled batch job contained an infinite while‑true loop, causing all 500 HikariCP connections to be held, slowing the application dramatically; it details the investigation steps, root‑cause analysis, and both emergency and long‑term fixes, plus a checklist to avoid similar bugs.
A production server hit 100% disk usage, prompting the author to use df, du and find to locate oversized log files, uncover missing rotation, excessive debug logging and a looping exception, then perform urgent cleanup and implement logrotate, log level adjustments, and Prometheus alerts to prevent recurrence.
When a Kafka topic’s consumer lag suddenly spiked to over one million messages, the author traced the issue to improper acknowledgment handling, implemented emergency scaling, corrected exception processing, added a dead‑letter queue, and created a reusable checklist to prevent future backlogs.
The article walks through a real production incident where a Redis‑based distributed lock silently failed, causing duplicate point awards, and details the step‑by‑step investigation, root‑cause analysis of transaction‑lock ordering, and three concrete remediation strategies.
This article explains the differences among Connection reset, Read timed out, and Connect timed out, outlines typical causes for each, provides step‑by‑step Linux command checks, Java Spring Boot configuration examples, a real‑world case study, and a quick‑reference cheat sheet for troubleshooting network timeouts.
The article outlines why programmers feel overwhelmed by endless new technologies, presents a four‑stage learning model, three key mindsets, and practical methods—including a main‑line + branch framework, output‑driven learning, annual subtraction, and regular shutdowns—to create a lasting technical moat.
A logistics company struggled with mismatched label fees, manual reconciliation errors, and monthly profit loss, so the team deployed an automated recharge, label import, one‑click deduction, and reconciliation system that eliminated leakage, cut reconciliation time, and provided real‑time balance visibility.
After three years of remote programming, the author shares eight concrete rules—ranging from setting a dedicated workspace and dressing for work to fixed schedules, Pomodoro technique, tackling hardest tasks in the morning, prioritizing async communication, proactive reporting, and protecting flow time—to boost efficiency and maintain health.
This article walks through the end‑to‑end creation of a production‑grade table‑reservation platform, covering the three‑tier client architecture (WeChat Mini‑Program, H5/App via UniApp, and a Vue3 + Element Plus PC admin), a dual Spring Boot backend, Redis distributed locking combined with MySQL unique indexes for high‑concurrency seat booking, JWT‑based authentication, RBAC permission control, and an Apple‑inspired design system, all illustrated with concrete code snippets and deployment tips.
This article concludes a ten‑part Git series by summarizing team collaboration best practices, covering workflow selection, branch naming, commit message conventions, daily development steps, code‑review checklist, command cheat sheet, and a team agreement template to turn Git knowledge into actionable standards.
