You need to explain the best reason to implement the consumer callback interface 'ConsumerRebalanceListener' prior to a Consumer Group Rebalance. Which statement is correct?

The correct answer is A. Partitions assigned to a consumer may change. The best reason to implement the ConsumerRebalanceListener is because partitions assigned to a consumer may change during a rebalance. This interface allows custom logic - such as committing offsets or initializing state - before and after partitions are reassigned.

Developing Kafka Consumers

Question

Options

APartitions assigned to a consumer may change.
BPrevious log files are deleted.
COffsets are compacted.
DPartition leaders may change.

How the community answered

(47 responses)

A
89% (42)
B
2% (1)
C
2% (1)
D
6% (3)

Explanation

The best reason to implement the ConsumerRebalanceListener is because partitions assigned to a consumer may change during a rebalance. This interface allows custom logic - such as committing offsets or initializing state - before and after partitions are reassigned.

Topics

#ConsumerRebalanceListener#consumer rebalance#partition assignment#offset commit

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