Message Consumer

You might say

The message was sent, but the queue keeps growing. Check whether a consumer is receiving, processing, and acknowledging the messages.

A message consumer is an application or instance that receives messages from a queue, handles them according to its rules, and acknowledges their processing statusAn upload API can publish a transcoding task while a consumer takes it from the queue and runs the work. An order system can use a consumer to receive an order-created message and create a shipping record. Without a consumer, messages build up; if processing fails, a message may be delivered again, so successful publishing is not business completion.

Who takes a message and completes the work after it is sent?

Email message queueemail queue

message 41ready

message 42ready

consumers0

EvidenceQueue depth keeps increasing

Publishing succeeds, but no application consumes messages.

A consumer receives, processes, and reports

Locate the source of buildup: The producer only sends a message to the queue. If no consumer is running, or consumers are slower than publishing, messages keep accumulating.

Acknowledge after processing: The consumer runs the handler and acknowledges success. On failure, the system can redeliver or record the failure under its rules instead of pretending the work finished.

Judge improvement by evidence: A simulated message should show publish, delivery, processing, and result feedback in logs or status, while buildup falls. A consumer is not the queue; one application can also publish.

You can say this to an AI Agent

Inspect the consumer for this message queue: confirm it starts and keeps receiving messages, reports successful processing, and requeues or records failures instead of silently losing them. Simulate one message and verify the full path from publish to delivery, processing, and result feedback.

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The producer reports success, but the queue keeps growing. What should you inspect first?

A. Have the producer resend the same messages until the queue shrinksB. Clear the queue so the monitoring number looks normal againC. Check whether consumers are online, receiving messages, failing, and reporting results