How can you modify a Kafka consumer poll loop to handle empty polls gracefully without busy looping?

hard📝 Application Q9 of 15

Kafka - Consumers

ARemove the poll timeout to wait indefinitely.

BAdd a short sleep (e.g., Thread.sleep(100)) when poll returns no records.

CCall consumer.close() when no records are returned.

DUse poll(0) to avoid waiting for messages.

Step-by-Step Solution

Solution:

Step 1: Understand busy looping problem
Polling continuously with no messages wastes CPU cycles (busy loop).
Step 2: Add sleep to reduce CPU usage
Adding a short sleep when no records are returned pauses the loop briefly, reducing CPU load.
Final Answer:
Add a short sleep (e.g., Thread.sleep(100)) when poll returns no records. -> Option B
Quick Check:
Sleep on empty poll prevents busy loop [OK]

Quick Trick: Sleep briefly when no messages to avoid busy loop [OK]

Common Mistakes:

Master "Consumers" in Kafka

9 interactive learning modes - each teaches the same concept differently

Want More Practice?

15+ quiz questions · All difficulty levels · Free

More Kafka Quizzes