ML Engineer MasterClass (April) | 6 seats left

Schema Evolution & Data Contracts

Schema Evolution & Data Contracts

Schema Evolution & Data Contracts

An upstream team renames a column from user_id to userId. It's a one-line change, totally reasonable from their side. No deployment fails. No alerts fire. But three downstream Spark jobs are now silently joining on a field that returns null for every row, and the revenue dashboard has been understating numbers for four days before anyone notices. That's not a hypothetical. That's Tuesd...

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