[Solved] Given this Kafka consumer snippet:ConsumerRecords records = consumer.... consumer.commitSync();What is the effect of calling commitSync() immediately after poll() without processing the records? | Kafka

Kafka - Consumers

Given this Kafka consumer snippet:

ConsumerRecords records = consumer.poll(Duration.ofMillis(100));
consumer.commitSync();

What is the effect of calling commitSync() immediately after poll() without processing the records?

AOffsets are not committed because records are not processed

BOffsets are committed for the last polled batch, even if records are unprocessed

CAn exception is thrown due to unprocessed records

DOffsets commit is deferred until records are processed

Step-by-Step Solution

Solution:

Step 1: Understand commitSync behavior
commitSync() commits the offsets of the last polled records regardless of processing.
Step 2: Effect of calling commitSync immediately
Calling it immediately after poll() commits offsets even if records are not processed yet.
Final Answer:
Offsets are committed for the last polled batch, even if records are unprocessed -> Option B
Quick Check:
commitSync commits last polled offsets regardless of processing [OK]

Quick Trick: commitSync commits offsets of last poll regardless of processing [OK]

Common Mistakes:

Master "Consumers" in Kafka

9 interactive learning modes - each teaches the same concept differently

More Kafka Quizzes

Given this Kafka consumer snippet: