A nightly ingestion job failed quietly for nine days and finance found the missing rows before your alerts did. Reconstruct it.

Exit codes said green while the warehouse went hollow. Where detection should have sat, why retries could not help, and the backfill discipline finance will actually accept.

Grounded in researched DevOps, SRE and platform engineering interview loops, written to a senior-engineer editorial bar, and never padded to hit a word count.