Log Analyzer

Overview

Parse, filter, and analyze application and infrastructure logs to quickly identify root causes of production issues. Handles JSON structured logs, plaintext server logs, syslog format, and multi-line stack traces.

Instructions

1. Identify log format

Detect whether logs are JSON (one object per line), plaintext with timestamps, syslog, or mixed format. Look for common patterns:

• JSON: {"timestamp":"...","level":"ERROR","message":"..."}
• Syslog: Feb 17 14:23:01 hostname service[pid]: message
• Plaintext: 2026-02-17 14:23:01.234 ERROR [thread] class - message

2. Filter and extract relevant entries

When investigating an incident:

• Filter by time window (e.g., last 30 minutes before the alert)