A Performance Test on Steroids!
summary
A custom synthetic test-data API generates complete invoices from minimal payloads; a script sends a payload with invoiceNumber set to a large integer. The API treats invoiceNumber as a count, so each request creates 800,000,000 invoices, overwhelming message handlers and Azure databases (roughly 4,000x the normal daily volume of ~200,000). The bug is a naming/validation error and the generator works — just with catastrophic input interpretation.
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