I have a 3 node Kafka cluster. And the following properties are set in server.properties:
offsets.topic.replication.factor=3 default.replication.factor=3 min.insync.replicas=2 In one terminal, I ran the following commands: bin/kafka-topics --zookeeper localhost:2181 --create --replication-factor 3 --partitions 1 --topic test-topic bin/kafka-console-consumer --bootstrap-server localhost:9092 --topic test-topic --offset earliest --partition 0 In another terminal, I ran this command: bin/kafka-console-producer --broker-list localhost:9092 --topic test-topic After a while, the following error will keep popping out in the second terminal: [2018-07-18 17:09:06,255] ERROR [Consumer clientId=consumer-1, groupId=console-consumer-61589] Offset commit failed on partition test-topic-0 at offset 2: The coordinator is not available. (org.apache.kafka.clients.consumer.internals.ConsumerCoordinator) After I added the following property to server.properties, the error disappeared: offsets.topic.replication.factor=3 I think that it is better to document the relation between such properties. -- Jingguo
