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What would the RequestHandlerAvgIdlePercent metric value close to 100% indicate about a Kafka broker?

medium📝 Predict Output Q5 of Q15
Kafka - Monitoring and Operations

What would the RequestHandlerAvgIdlePercent metric value close to 100% indicate about a Kafka broker?

AThe broker is experiencing network errors
BThe broker is overloaded with requests
CThe broker's request handler threads are mostly idle
DThe broker has many under-replicated partitions
Step-by-Step Solution
Solution:

  1. Step 1: Understand what RequestHandlerAvgIdlePercent measures

    This metric shows the average idle time percentage of request handler threads.

  2. Step 2: Interpret a value near 100%

    Near 100% means threads are mostly idle, so the broker is not busy handling requests.

  3. Final Answer:

    The broker's request handler threads are mostly idle -> Option C

  4. Quick Check:

    RequestHandlerAvgIdlePercent near 100% = Threads mostly idle [OK]
Quick Trick: High RequestHandlerAvgIdlePercent means low broker load [OK]
Common Mistakes:
MISTAKES
  • Assuming high value means high load
  • Confusing idle percent with error rate

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