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You have a Kafka cluster with topics t1 and t2. In the output below, topic t2 shows Partition 1 with a leader "-1". What is the most likely reason for this? ... $ kafka-topics --zookeeper localhost:2181 --describe --topic t1 Topic:t1 PartitionCount 1 ReplicationFactor 1 Configs: Topic: t1 Partition: 0 Leader: 0 Replicas: 0 Isr: 0 $ kafka-topics --zookeeper localhost:2181 --describe --topic t2 Topic:t2 PartitionCount 2 ReplicationFactor 1 Configs: Topic: t2 Partition: 0 Leader: 0 Replicas: 0 Isr: 0 Topic: t2 Partition: 1 Leader: -1 Replicas: 1 Isr:
Correct Answer: A
A Leader of -1 indicates that no broker is currently the leader for that partition. This usually happens when the only replica for that partition is unavailable, often due to the associated broker (in this case, Broker 1) failing or being offline. Kafka cannot elect a leader if no replica is in the in-sync replica (ISR) list, which leads to leader = -1.
