2024-01-01 10:00:01.123 INFO [main] Application starting on port 8080
2024-01-01 10:00:01.456 INFO [main] Database connection pool initialized (size: 10)
2024-01-01 10:00:01.789 INFO [main] Redis connection established
2024-01-01 10:00:02.000 INFO [http-nio-8080-exec-1] GET /api/health - 200 OK (2ms)
2024-01-01 10:00:05.234 WARN [http-nio-8080-exec-2] High memory usage: 85% (heap: 850MB/1GB)
2024-01-01 10:00:07.567 ERROR [http-nio-8080-exec-3] Failed to authenticate user: invalid token
2024-01-01 10:00:08.890 INFO [http-nio-8080-exec-4] POST /api/users - 201 Created (45ms)
2024-01-01 10:00:12.345 DEBUG [db-pool-1] SQL: SELECT * FROM users WHERE id = ? (12ms)
2024-01-01 10:00:15.678 ERROR [redis-pool-1] Redis connection timeout after 5000ms
2024-01-01 10:00:18.901 WARN [scheduler-1] Background job queue size: 1250 (threshold: 1000)
2024-01-01 10:00:22.234 INFO [http-nio-8080-exec-5] PUT /api/users/123 - 200 OK (23ms)
2024-01-01 10:00:25.567 ERROR [http-nio-8080-exec-6] Database query failed: connection reset
2024-01-01 10:00:28.890 INFO [metrics-reporter] CPU: 45%, Memory: 82%, Disk: 67%
2024-01-01 10:00:32.123 DEBUG [cache-manager] Cache hit rate: 94.5% (hits: 9450, misses: 550)
2024-01-01 10:00:35.456 WARN [security-monitor] 5 failed login attempts from IP 192.168.1.100