Changing Cluster Name in Cassandra

Question

I have a cluster with 2 machines (centos7 and cassandra 3.4), 192.168.0.175 and 192.168.0.174. The seed is the 192.168.0.175.

I simply want to change the cluster name. Peace of cake should be.

I did on each cluster :

• update system.local set cluster_name = 'America2' where key='local';

• i did the nodetool flush

• i updated the cassandra.yaml with the new name

• restarted cassandra.

When i cqlsh any if describes me as connected to new cluster_name America2

When i run nodetool describecluster it shows the old cluster name America

If i stop cassandra on both machines and i try to restart them i find in logs the good old error :

org.apache.cassandra.exceptions.ConfigurationException: Saved cluster name America != configured name America2

So....what am i doing wrong!?

Answer 1

before changing cluster name

1. delete node from cluster ring

   nodetool decommission

2. stop node and change cluster name in cassandra.yaml

3. clean node

   sudo rm -rf /var/lib/cassandra/* /var/log/cassandra/*

4. start cassandra node

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