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Diagnose a growing queue backlog in an Azure-based background processing system.
Diagnoses duplicate processing from Azure Service Bus lock loss or Storage Queue visibility behavior without repeating generic idempotency theory.
Diagnose missing trace continuity when an API enqueues work processed by an Azure worker.
Investigate messages that repeatedly fail and move to a poison queue or dead-letter queue.
Covers queue-backed work, idempotency, retries, visibility timeout, poison messages, progress tracking, and choosing Storage Queues or Service Bus.
Compares App Service WebJobs and Azure Functions for queue processing, scheduled tasks, scaling, deployment ownership, and operational isolation.