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In a MirrorMaker setup, if the source cluster is unreachable, what will MirrorMaker do?

medium📝 Predict Output Q5 of 15
Kafka - Multi-Datacenter and Replication

In a MirrorMaker setup, if the source cluster is unreachable, what will MirrorMaker do?

APause replication and retry connecting to source
BDelete all replicated data in the target cluster
CSwitch to producing messages to the source cluster
DImmediately stop and exit without retry
Step-by-Step Solution
Solution:

  1. Step 1: Understand MirrorMaker fault tolerance

    MirrorMaker is designed to handle temporary source outages by retrying connections.

  2. Step 2: Analyze behavior on source unavailability

    It pauses replication and keeps retrying rather than deleting data or exiting immediately.

  3. Final Answer:

    Pause replication and retry connecting to source -> Option A

  4. Quick Check:

    Source unreachable = pause and retry [OK]
Quick Trick: MirrorMaker retries source connection if unreachable [OK]
Common Mistakes:
MISTAKES
  • Thinking it deletes data on failure
  • Assuming it switches producing direction
  • Believing it stops immediately without retry

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