Log Analyzer
Overview
Parses and analyzes log files to extract errors, warnings, patterns, and actionable insights.
When to Use
- User asks to "analyze these logs" or "check the error log"
- Debugging session needs pattern analysis
How It Works
Step 1: Read log file
Windows: type server.log or Get-Content error.log -Tail 100 macOS/Linux: tail -n 100 app.log
Step 2: Detect log format
[2024-01-15 14:30:45] -> Timestamp bracketed ERROR 2024-01-15 -> Level + timestamp { "level": "error" } -> JSON structured
Step 3: Extract key information
Level: ERROR, WARN, INFO, DEBUG Timestamp: when it happened Source: which component/module Message: what happened
Step 4: Generate analysis report
Output Format
Total lines: 1,247 Time range: 10:00 -> 18:00
Errors: 23 Warnings: 67 Info: 892
Top Errors by frequency:
- Connection timeout (x12) - API calls to external service
- Auth failure (x6) - Failed login from IP xxx
Anomaly: Unusual spike at 16:00-17:00 (18 errors in 1 hour)
Recommendations:
- Check external service connectivity
- Review failed logins for security
- Add retry logic to DB writes