Hello,
Recently i have made UAT cluster of KAFKA with three brokers. the problem is min.insync.replicas is not taking any effect. following things are happeninig :
1. in server.properties there is no mention of min.insync.replicas, whenever i am creating any topic and whatever replication number i am providing ,in synch replica is just copying that. so if i create topic test with replica 3 in synch replica is also 3. even if i am creating replication with 2 then in synch is also 2.
Partition Detail
Partition First Offset Last Offset Size Leader Replicas In Sync Replicas Preferred Leader? Under Replicated?
| 0 |
0 |
0 |
0 |
2 |
2,3,1 |
1,2,3 |
Yes |
No |
| 1 |
0 |
0 |
0 |
3 |
3,1,2 |
1,2,3 |
Yes |
No |
| 2 |
0 |
0 |
0 |
1 |
1,2,3 |
1,2,3 |
Yes |
No |
2. i tried to put min.insync.replicas=2 in server.properties of all the brokers and tried creating the topic with replication 3, here i was expecting in synch replica to be 2 but no its again 3.
3. then i tried to create topic by providing config with this :
kafka-topics.sh --create --zookeeper machine1:2181,machine2:2181,machine3:2181 --replication-factor 3 --partitions 3 --config min.insync.replicas=1 --topic syncdemo
here i thought this time it will show in synch replica as 1 but no ,it stills 3.
4. lastly i tried to alter it to provide 2 instead of 1 to check whether alter make it work by below :
kafka-topics.sh --alter --zookeeper machine1:2181,machine2:2181,machine3:2181 --topic syncdemo --config min.insync.replicas=1 ,
but no effect.
its really very frustrating that none of the ways are making it work. please provide the solution,thanks in advance.
i am using : CDH 5.7 and apache Kafka : kafka_2.11-1.0.0 , zookeeper-3.4.5-cdh5.7.0 on redhat 6.5.
