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If RabbitMQ's 'consumers' metric for a queue is zero but 'messages_ready' is high, what does this indicate?

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RabbitMQ - Monitoring and Management
If RabbitMQ's 'consumers' metric for a queue is zero but 'messages_ready' is high, what does this indicate?
AConsumers are acknowledging messages immediately
BMessages are being processed quickly
CQueue is empty
DNo consumers are connected to process messages
Step-by-Step Solution
Solution:
  1. Step 1: Understand 'consumers' metric and analyze high 'messages_ready' with zero consumers

    This shows how many consumers are connected to the queue. High waiting messages with no consumers means no one is consuming messages.
  2. Final Answer:

    No consumers are connected to process messages -> Option D
  3. Quick Check:

    Zero consumers + high waiting messages = no processing [OK]
Quick Trick: Zero consumers means messages pile up in queue [OK]
Common Mistakes:
MISTAKES
  • Assuming messages are processed quickly with zero consumers
  • Thinking queue is empty when messages_ready is high

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