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After a node restart, you notice the node lost all queues. What is the most probable cause?

medium📝 Troubleshoot Q7 of 15
RabbitMQ - Clustering
After a node restart, you notice the node lost all queues. What is the most probable cause?
AThe cluster is misconfigured to delete queues
BThe node is a RAM node and lost in-memory state
CThe node is a disc node but disk is full
DThe node was not part of the cluster
Step-by-Step Solution
Solution:

  1. Step 1: Identify node type impact on state

    RAM nodes lose all in-memory state on restart, including queues.

  2. Step 2: Consider other causes

    Disc nodes keep queues on disk; full disk or misconfiguration would cause errors, not silent loss.

  3. Final Answer:

    The node is a RAM node and lost in-memory state -> Option B

  4. Quick Check:

    RAM node restart = lost queues [OK]
Quick Trick: Queues lost after restart? Check if node is RAM type [OK]
Common Mistakes:
MISTAKES
  • Assuming disc nodes lose queues on restart
  • Blaming cluster misconfiguration without evidence
  • Ignoring node membership status

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