It is 3:00 AM. You are on call. An hourly batch job that aggregates revenue data for the CFO's morning dashboard failed halfway through execution at the "Write to Warehouse" step.
You fix the syntax error and hit "Clear State & Rerun" on the DAG. The run goes green. You go back to sleep.
The Question: Three hours later, the CFO calls screaming that revenue is double what it should be. What architectural principle did you ignore?
The Data Engineering Channel
It is 3:00 AM. You are on call. An hourly batch job that aggregates revenue data for the CFO's morning dashboard failed halfway through execution at the "Write to Warehouse" step.
You fix the syntax error and hit "Clear State & Rerun" on the DAG. The run goes green. You go back to sleep.
The Question: Three hours later, the CFO calls screaming that revenue is double what it should be. What architectural principle did you ignore?
3 days ago | [YT] | 5