LogAnalyzer MCP Server

export const sampleLogs = { // Database connection error with stack trace databaseError: ` 2024-01-23 10:30:15 INFO: Starting application... 2024-01-23 10:30:16 INFO: Connecting to database... 2024-01-23 10:30:17 ERROR: Database connection failed java.sql.SQLException: Connection is not available, request timed out after 30000ms. at org.apache.commons.dbcp2.PoolingDataSource.getConnection(PoolingDataSource.java:154) at com.app.service.DatabaseService.connect(DatabaseService.java:45) at com.app.controller.UserController.getUser(UserController.java:78) at com.app.controller.UserController.handleRequest(UserController.java:34) 2024-01-23 10:30:18 FATAL: Application shutting down due to critical error 2024-01-23 10:30:19 ERROR: Failed to save user data 2024-01-23 10:30:20 ERROR: Connection pool exhausted `, // JSON structured logs jsonLogs: ` {"timestamp":"2024-01-23T10:30:15Z","level":"info","message":"User login attempt","user_id":"12345"} {"timestamp":"2024-01-23T10:30:16Z","level":"error","message":"Authentication failed","user_id":"12345","error":"Invalid credentials","stack_trace":"at AuthService.authenticate(auth.js:45)\\n at LoginController.login(login.js:23)"} {"timestamp":"2024-01-23T10:30:17Z","level":"fatal","message":"Redis connection lost","service":"cache","error_code":"ECONNREFUSED","retry_count":3} {"timestamp":"2024-01-23T10:30:18Z","level":"warn","message":"High memory usage detected","memory_usage":"85%","threshold":"80%"} {"timestamp":"2024-01-23T10:30:19Z","level":"error","message":"Payment processing failed","transaction_id":"txn_123","amount":"$99.99","error":"Payment gateway timeout"} `, // Network/API errors networkError: ` [2024-01-23 10:30:15] INFO: API Gateway starting on port 8080 [2024-01-23 10:30:16] DEBUG: Registering routes... [2024-01-23 10:30:17] ERROR: Failed to connect to external API Request URL: https://api.external-service.com/v1/data Request Method: GET Response Status: 503 Service Unavailable Response Body: {"error":"Service temporarily unavailable","retry_after":300} [2024-01-23 10:30:18] WARN: Retrying request in 5 seconds (attempt 2/3) [2024-01-23 10:30:23] ERROR: Failed to connect to external API (attempt 2) [2024-01-23 10:30:28] ERROR: Failed to connect to external API (attempt 3) [2024-01-23 10:30:29] FATAL: Max retry attempts exceeded, marking service as down [2024-01-23 10:30:30] ERROR: Circuit breaker opened for external-service `, // Application runtime errors runtimeError: ` 2024-01-23 10:30:15 [main] INFO Application - Starting MyApp v1.2.3 2024-01-23 10:30:16 [main] INFO Configuration - Loading config from application.yml 2024-01-23 10:30:17 [worker-1] DEBUG DataProcessor - Processing batch of 1000 records 2024-01-23 10:30:18 [worker-1] ERROR DataProcessor - Null pointer exception in data processing java.lang.NullPointerException: Cannot invoke "com.app.model.User.getName()" because "user" is null at com.app.processor.DataProcessor.processUser(DataProcessor.java:67) at com.app.processor.DataProcessor.processBatch(DataProcessor.java:45) at com.app.worker.WorkerThread.run(WorkerThread.java:23) 2024-01-23 10:30:19 [worker-1] WARN DataProcessor - Skipping invalid record at position 457 2024-01-23 10:30:20 [worker-2] ERROR DataProcessor - OutOfMemoryError: Java heap space java.lang.OutOfMemoryError: Java heap space at java.util.Arrays.copyOf(Arrays.java:3236) at java.util.ArrayList.grow(ArrayList.java:275) at com.app.processor.DataProcessor.loadData(DataProcessor.java:123) 2024-01-23 10:30:21 [main] FATAL Application - System critical error, shutting down `, // Web server errors webServerError: ` 127.0.0.1 - - [23/Jan/2024:10:30:15 +0000] "GET /api/users HTTP/1.1" 200 1024 "-" "Mozilla/5.0" 127.0.0.1 - - [23/Jan/2024:10:30:16 +0000] "POST /api/login HTTP/1.1" 401 256 "-" "curl/7.68.0" 127.0.0.1 - - [23/Jan/2024:10:30:17 +0000] "GET /api/data HTTP/1.1" 500 512 "-" "Mozilla/5.0" 2024-01-23 10:30:17 [ERROR] Internal server error in /api/data Traceback (most recent call last): File "/app/routes/api.py", line 45, in get_data result = database.query("SELECT * FROM data WHERE id = %s", user_id) File "/app/database.py", line 23, in query cursor.execute(query, params) psycopg2.errors.SyntaxError: syntax error at or near "ELECT" 2024-01-23 10:30:18 [ERROR] Database query failed 2024-01-23 10:30:19 [WARNING] Connection pool running low: 2/10 connections available 127.0.0.1 - - [23/Jan/2024:10:30:20 +0000] "GET /health HTTP/1.1" 503 128 "-" "k8s-probe" `, // Configuration and startup errors configError: ` 2024-01-23 10:30:15 Starting application... 2024-01-23 10:30:16 Loading configuration from /etc/app/config.yaml 2024-01-23 10:30:17 ERROR: Configuration file not found: /etc/app/config.yaml 2024-01-23 10:30:18 ERROR: Failed to load database configuration 2024-01-23 10:30:19 ERROR: Required environment variable DATABASE_URL not set 2024-01-23 10:30:20 ERROR: Invalid port number in configuration: 'abc' 2024-01-23 10:30:21 FATAL: Unable to start application due to configuration errors 2024-01-23 10:30:22 ERROR: Application startup failed Process exiting with code 1 ` }; export const testCases = [ { name: 'Database Connection Error', log: sampleLogs.databaseError, expectedSeverity: 'high' as const, expectedErrorType: 'database' }, { name: 'JSON Structured Logs', log: sampleLogs.jsonLogs, expectedSeverity: 'high' as const, expectedErrorType: 'authentication' }, { name: 'Network/API Error', log: sampleLogs.networkError, expectedSeverity: 'medium' as const, expectedErrorType: 'network' }, { name: 'Runtime Application Error', log: sampleLogs.runtimeError, expectedSeverity: 'critical' as const, expectedErrorType: 'runtime' }, { name: 'Web Server Error', log: sampleLogs.webServerError, expectedSeverity: 'medium' as const, expectedErrorType: 'runtime' }, { name: 'Configuration Error', log: sampleLogs.configError, expectedSeverity: 'critical' as const, expectedErrorType: 'configuration' } ]; export default sampleLogs;