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Error Tracking

Track and aggregate errors for visibility into failure patterns.

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Error Tracking

Error Tracking Tools

Tool Description
Sentry Error tracking, stack traces
Bugsnag Error monitoring
Rollbar Real-time error tracking

Error Context

try {
    orderService.process(request);
} catch (Exception e) {
    Sentry.captureException(e);
    throw e;
}

Collect: stack trace, user context, breadcrumbs, tags.

Key Points

  • Understanding Error Tracking is essential for production systems
  • Always consider scalability and maintainability
  • Test thoroughly before deploying to production
  • Monitor performance and set up alerting

Common Patterns

  1. Validation: Always validate input at the boundary
  2. Error Handling: Use structured error responses
  3. Logging: Log key events for debugging
  4. Testing: Unit, integration, and load tests
  5. Documentation: Keep docs updated with code changes

Error Handling Patterns

Error Response Format

{
  "error": {
    "code": "VALIDATION_ERROR",
    "message": "Invalid input",
    "details": [...]
  }
}

Status Codes

  • 400: Bad Request
  • 401: Unauthorized
  • 403: Forbidden
  • 404: Not Found
  • 409: Conflict
  • 429: Rate Limited
  • 500: Internal Error

Best Practices

  • Log all errors
  • Don't expose internals
  • Use custom exceptions
  • Implement global handler

Key Points

  • Understanding Error Tracking is essential for production systems
  • Always consider scalability and maintainability
  • Test thoroughly before deploying to production
  • Monitor performance and set up alerting

Common Patterns

  1. Validation: Always validate input at the boundary
  2. Error Handling: Use structured error responses
  3. Logging: Log key events for debugging
  4. Testing: Unit, integration, and load tests
  5. Documentation: Keep docs updated with code changes

Practice Problems

0/3solved
Implement Error Tracking

Design and implement a solution for Error Tracking in a backend system. Consider scalability, error handling, and production readiness.

Solution
// Error Tracking implementation
// Key aspects: validation, error handling, logging, testing

public class ErrorTracking {
    // Production-ready implementation
}
Error Tracking Edge Cases

Identify and handle edge cases for Error Tracking. What happens under high load, with invalid input, or during failures?

Solution
// Edge case handling:
// 1. Null/empty input -> validation
// 2. High load -> rate limiting, queuing
// 3. Failures -> retries, circuit breaker
// 4. Concurrent access -> locks, idempotency
Error Tracking Testing Strategy

Write a testing strategy for Error Tracking. Include unit tests, integration tests, and performance tests.

Solution
// Test plan:
// - Unit: 80% coverage target
// - Integration: API contracts
// - Performance: latency, throughput
// - Chaos: failure injection

Quiz

1. Error tracking tools provide?

Question 1 options

2. Error grouping helps with?

Question 2 options

3. What is the primary purpose of Error Tracking?

Question 3 options

4. What is a common mistake when implementing Error Tracking?

Question 4 options

Flashcards

Question

Error tracking tools?

Click to reveal answer

Answer

Sentry, Bugsnag, Rollbar

Question

Error grouping purpose?

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Answer

Cluster similar errors into unique issues

Question

What is Error Tracking?

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Answer

Error Tracking is a key concept in backend development.

Question

When to use Error Tracking?

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Answer

Use Error Tracking when building production systems that require reliability, scalability, and maintainability.

Question

Error Tracking best practices

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Answer

Follow SOLID principles, write clean code, test thoroughly, document decisions, and monitor in production.

Revision Notes

Key Takeaways

  • 1.Error tracking: Sentry, Bugsnag, Rollbar
  • 2.Collect: stack trace, context, breadcrumbs
  • 3.Group similar errors
  • 4.Alert on new or increasing errors

Interview Tips

  • •Implement error tracking
  • •Use error tracking tools

Cheat Sheet

Error Tracking

  • Tools: Sentry, Bugsnag, Rollbar
  • Collect: stack trace, context, breadcrumbs
  • Group similar errors
  • Alert: new or increasing errors