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Error Handling

Error handling in Pythmata follows BPMN 2.0 specifications while providing additional features for robust process execution.

Error Types

BPMN Errors

  • Business Errors (Expected)
  • Technical Errors (Unexpected)
  • Timeout Errors
  • Validation Errors

System Errors

  • Network Issues
  • Database Errors
  • External Service Failures

Error Handling Mechanisms

Error Events

  • Error Start Events
  • Error Intermediate Events
  • Error End Events
  • Error Boundary Events

Error Handling Patterns

  1. Compensation
  2. Rollback mechanisms
  3. Compensation events

  4. Transaction boundaries

  5. Retry Logic

  6. Configurable retry attempts
  7. Exponential backoff

  8. Dead letter queues

  9. Error Escalation

  10. Error propagation
  11. Parent process notification
  12. Administrative alerts

Best Practices

  1. Error Definition
  2. Use specific error codes
  3. Provide clear error messages

  4. Include relevant context

  5. Error Recovery

  6. Implement compensation handlers
  7. Define fallback paths

  8. Maintain process consistency

  9. Monitoring and Logging

  10. Error tracking
  11. Audit trails
  12. Performance impact analysis