[Solved] What is wrong with this Kafka consumer poll loop?while (true) { var records = consumer.poll(Duration.ofMillis(100)); for (var record : records) { System.out.println(record.value()); } consumer.... | Kafka

Kafka - Consumers

What is wrong with this Kafka consumer poll loop?

while (true) {
  var records = consumer.poll(Duration.ofMillis(100));
  for (var record : records) {
    System.out.println(record.value());
  }
  consumer.close();
}

Afor loop cannot iterate over records.

Bpoll() should not use Duration argument.

CSystem.out.println() cannot print record values.

DCalling consumer.close() inside the loop stops polling prematurely.

Step-by-Step Solution

Solution:

Step 1: Analyze consumer.close() placement
Calling close() inside the infinite loop closes the consumer after first poll, stopping further polling.
Step 2: Confirm other code parts are correct
poll() with Duration and for loop are valid; print statement is correct.
Final Answer:
Calling consumer.close() inside the loop stops polling prematurely. -> Option D
Quick Check:
close() inside loop = premature stop [OK]

Quick Trick: Close consumer after loop, not inside it [OK]

Common Mistakes:

Closing consumer inside poll loop
Misusing poll() argument
Incorrect for-each loop assumptions

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More Kafka Quizzes

What is wrong with this Kafka consumer poll loop?

Step 1: Analyze consumer.close() placement

Step 2: Confirm other code parts are correct

Final Answer:

Quick Check:

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