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You configured a Kafka cluster in active-passive mode but both clusters are processing messages simultaneously. What is the likely cause?

medium📝 Debug Q14 of 15
Kafka - Multi-Datacenter and Replication
You configured a Kafka cluster in active-passive mode but both clusters are processing messages simultaneously. What is the likely cause?
AKafka does not support active-passive mode.
BPassive cluster is offline.
CZookeeper ensemble is shared correctly.
DFailover mechanism is not properly configured, causing both to be active.
Step-by-Step Solution
Solution:

  1. Step 1: Identify expected active-passive behavior

    Only one cluster should be active; the other should be standby. If both are active, failover or coordination is misconfigured, allowing both to process.

  2. Final Answer:

    Failover mechanism is not properly configured, causing both to be active. -> Option D

  3. Quick Check:

    Misconfigured failover = both active [OK]
Quick Trick: Check failover setup if both active in active-passive mode [OK]
Common Mistakes:
MISTAKES
  • Assuming Kafka can't do active-passive
  • Ignoring failover configuration
  • Thinking shared Zookeeper means passive is active

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