Error handling and transaction recovery in sagas
One of the fundamental motivations for using a saga in a distributed system is its ability to manage errors and ensure system resilience. As seen earlier, the process manager centralizes the control flow and handles errors in a more procedural manner while the saga embraces the nature of distributed transactions by defining compensating actions and allowing decentralized recovery strategies. Understanding how the saga handles failures and ensures transactional integrity is key to designing robust business processes.
Failures in a saga can occur at various stages of execution, and each type of failure requires a different strategy for resolution. The two main failure categories are as follows:
- Step failures: A single step in the saga may fail due to network issues, service unavailability, or validation errors. The system can attempt retries with exponential backoff or invoke a compensating transaction to undo the operation...
