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In an active-passive Kafka setup, if the passive cluster is not properly synchronized, what is the likely outcome after failover?

medium📝 Conceptual Q5 of 15
Kafka - Multi-Datacenter and Replication
In an active-passive Kafka setup, if the passive cluster is not properly synchronized, what is the likely outcome after failover?
AThe passive cluster will reject all traffic permanently.
BFailover will be seamless with no data issues.
CBoth clusters will merge data automatically.
DData loss or inconsistency may occur in the new active cluster.
Step-by-Step Solution
Solution:

  1. Step 1: Understand synchronization importance

    If passive cluster is not synced, it lacks latest data.

  2. Step 2: Analyze failover impact

    Failover to unsynced passive cluster causes data loss or inconsistency.

  3. Final Answer:

    Data loss or inconsistency may occur in the new active cluster. -> Option D

  4. Quick Check:

    Unsynced passive failover = A [OK]
Quick Trick: Passive must sync to avoid data loss on failover [OK]
Common Mistakes:
MISTAKES
  • Assuming failover is always seamless
  • Thinking clusters merge data automatically
  • Believing passive cluster rejects traffic forever

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