MongoDB Transactions: Understanding Rollback

Implement a Transaction with Rollback Handling

Write a MongoDB transaction that updates multiple documents and includes error handling to rollback and retry the transaction on transient errors.

Expected output: A transaction that either commits all changes or rolls back and retries until successful or a non-retryable error occurs.

Hint: Use session.withTransaction and check for 'TransientTransactionError' labels in exceptions.

A transaction rollback occurs when a transaction fails due to errors like write conflicts, network issues, or explicit aborts, causing MongoDB to undo all changes made during that transaction.

You can handle rollbacks by catching transaction errors, implementing retry logic for transient errors, and ensuring proper session management to maintain data consistency.

Rollback is crucial because it maintains the atomicity and consistency of data by ensuring that partial or failed transactions do not leave the database in an inconsistent state.