A replayed batch inserts duplicate business records
Target row counts or totals increase on a retry even though the source events did not change.
Explore →SARAVANA KUMAR · TECHNICAL KNOWLEDGE
Data Engineering problems & solutions
Investigate the symptom, test the likely cause and check the outcome. All scenarios are illustrative learning cases.
4 detailed problems and solutions · Illustrative learning cases
A schema change silently turns missing amounts into zero
Revenue drops while the pipeline still reports success.
Explore →A revenue reconciliation differs by a rounding residue
Use decimal input and an explicit rounding policy for currency transformations.
Explore →Daily totals move records into the wrong business day
Convert timezone-aware instants before assigning a local reporting date.
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