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You tried to start Kafka server but got an error saying 'Could not connect to Zookeeper'. What is the likely cause?

medium📝 Debug Q14 of 15
Kafka - Basics and Event Streaming
You tried to start Kafka server but got an error saying 'Could not connect to Zookeeper'. What is the likely cause?
AKafka server is already running
BZookeeper service is not running
CTopic name is missing
DJava is not installed
Step-by-Step Solution
Solution:

  1. Step 1: Analyze error message

    'Could not connect to Zookeeper' means Kafka cannot reach Zookeeper service.

  2. Step 2: Identify cause

    This usually happens if Zookeeper is not started or crashed.

  3. Final Answer:

    Zookeeper service is not running -> Option B

  4. Quick Check:

    Connection error = Zookeeper not running [OK]
Quick Trick: Check Zookeeper is running before Kafka start [OK]
Common Mistakes:
  • Ignoring Zookeeper status
  • Assuming Kafka server conflict
  • Blaming missing topic name

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