Hi All,
Below is my partition information for the topic **xx_json_topic** .This is a
Kafka cluster with three nodes .
All nodes up :
Topic: xx_json_topic PartitionCount:4 ReplicationFactor:2
Configs:
Topic: xx_json_topic Partition: 0 Leader: 1 Replicas: 3,1
Isr: 3,1
Topic: xx_json_topic Partition: 1 Leader: 2 Replicas: 1,2
Isr: 2,1
Topic: xx_json_topic Partition: 2 Leader: 2 Replicas: 2,3
Isr: 2,3
Topic: xx_json_topic Partition: 3 Leader: 3 Replicas: 3,2
Isr: 2,3
At this point.. if i bring down the node "node-1" ..It looks like below :
Topic: xx_json_topic PartitionCount:4 ReplicationFactor:2
Configs:
Topic: xx_json_topic Partition: 0 Leader: 3 Replicas: 3,1
Isr: 3
Topic: xx_json_topic Partition: 1 Leader: 2 Replicas: 1,2
Isr: 2
Topic: xx_json_topic Partition: 2 Leader: 2 Replicas: 2,3
Isr: 2,3
Topic: xx_json_topic Partition: 3 Leader: 3 Replicas: 3,2
Isr: 2,3
My question is ..if kafka knows that the node-1 is down and it needs to
maintain the replication factor-2 ,wouldn't it make node 3 a replica for
partition-1 && node-2 a replica for partition-0 then make node-3 and node-2
part of their Isr ?
Or you think Kafka doesn't promise that...
If replication factor is 2 ..It doesn't mean that data will be available in
atleast 2 nodes at all time(---like consistency level in Cassandra) .
I also have this question posted below :
http://stackoverflow.com/questions/32588784/would-kafka-create-a-new-follower-if-one-of-its-replica-is-down-to-keep-up-with
<http://stackoverflow.com/questions/32588784/would-kafka-create-a-new-follower-if-one-of-its-replica-is-down-to-keep-up-with>
—Dhyan
