Nov 10, 2025 · Operations

Why a Healthy Frontend Still Returns 504 Errors: An MTU Mismatch Case Study

A production incident showed that despite flawless frontend health metrics and no logged errors, a subset of users experienced 504 Gateway Timeout errors caused by an MTU mismatch in the network path, highlighting the need for end‑to‑end connectivity checks beyond application monitoring.

504 timeoutMSS clampingMTU

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Why a Healthy Frontend Still Returns 504 Errors: An MTU Mismatch Case Study

Selected Java Interview Questions

Sep 22, 2025 · Backend Development

Quickly Diagnose Spring Boot + Nacos + MySQL Microservice Failures

This guide provides a step‑by‑step troubleshooting workflow for Spring Boot microservices using Nacos as a config/registry and MySQL as the database, covering log inspection, process checks, port listening, network connectivity, configuration validation, database connectivity, system resources, startup commands, and an optional one‑click diagnostic script.

LinuxNacosSpring Boot

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Quickly Diagnose Spring Boot + Nacos + MySQL Microservice Failures