logging-java

Configure SLF4J and Logback for structured JSON logging with MDC context.

Updated Mar 28, 2026

Search Tags:#logging #java #mdc #correlation-id #structured-logging #slf4j #logback

Ready to run

npx skills add https://github.com/congiuluc/my-awesome-copilot --skill logging-java

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: logging-java
Source: https://github.com/congiuluc/my-awesome-copilot/tree/main/skills/logging-java
Command: npx skills add https://github.com/congiuluc/my-awesome-copilot --skill logging-java

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Standardizes and strengthens Java logging in Spring Boot by combining SLF4J with Logback, enabling structured, context-rich logs with MDC, correlation IDs, and safe JSON output for production.

Core Features & Use Cases

Structured, parameterized logging with MDC context for traceability
Configurable output: human-readable in development, JSON in production, with per-package log-level tuning
Protection of sensitive data through filtering of PII and credentials

Quick Start

Configure SLF4J + Logback in a Spring Boot project and enable MDC-based correlation IDs for tracing.

Frequently Asked Questions about logging-java

High-intent search queries and answers about installing and using this skill.

FAQPage Schema

How do I configure structured JSON logging in a Spring Boot application?▼

Structured JSON logging in Spring Boot is configured by combining SLF4J with Logback, enabling context-rich, machine-readable output with MDC and correlation IDs for production environments.

What is MDC and how does it help with tracing in Java microservices?▼

MDC, or Mapped Diagnostic Context, enriches Java logs with contextual data like correlation IDs, enabling traceable logs across distributed microservices by attaching unique identifiers to each request flow.

Can I use different log formats for development and production in Logback?▼

Logback supports configurable output formats, allowing human-readable logs during development and structured JSON output in production, with per-package log-level tuning for granular control.

What is the best way to filter sensitive data and PII from Java application logs?▼

Filtering sensitive data and PII from Java logs requires a logging configuration that supports pattern-based masking, ensuring credentials and personal information are removed before logs are written.

Why are my Java microservice logs hard to trace across distributed requests?▼

Microservice logs are hard to trace when they lack structured context and correlation IDs, making it difficult to follow a single request flow across distributed systems without MDC-based tracing.

Does SLF4J work with Logback for per-package log-level management in Spring Boot?▼

SLF4J works seamlessly with Logback in Spring Boot to provide per-package log-level management, allowing developers to tune logging verbosity granularly across different application packages.