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  I'd be glad to explain microservice application rollback for e-commerce, incorporating best practices and addressing potential challenges: Understanding Rollback Requirements in E-commerce Transactional Consistency: When a failure occurs during an update spanning multiple microservices (e.g., order placement involving product inventory, user account, and payment), consistent rollback across all affected services is crucial. Partial Success Scenarios: If some microservices succeed but others fail (e.g., payment goes through but inventory update fails), a mechanism to undo completed operations and handle partial rollbacks is essential. Data Integrity: Rollback strategies should maintain data integrity by preventing data inconsistencies or data loss. Rollback Techniques for E-commerce Microservices Compensating Transactions:  Each microservice implements a compensating transaction that reverses its actions if the overall transaction fails. Example (Order Placement):...