Hi,
I am trying to rename a cluster by following the instruction on Wiki:
Cassandra says "ClusterName mismatch: oldClusterName != newClusterName" and
refuses to start
To prevent
operator errors, Cassandra stores the name of the cluster in its system
table. If you need to rename a cluster for some reason, you can:
Perform these steps on each node:
1. Start the cassandra-cli connected locally to this node.
2. Run the following:
1. use system;
2. set LocationInfo[utf8('L')][utf8('ClusterName')]=utf8('<new cluster
name>');
3. exit;
3. Run nodetool flush on this node.
4. Update the cassandra.yaml file for the cluster_name as the same as
2b).
5. Restart the node.
Once all nodes have been had this operation performed and restarted,
nodetool ring should show all nodes as UP.
Get the following error:
Connected to: "Test Cluster" on 10.200.128.151/9160
Welcome to Cassandra CLI version 1.1.6
Type 'help;' or '?' for help.
Type 'quit;' or 'exit;' to quit.
[default@unknown] use system;
Authenticated to keyspace: system
[default@system] set
LocationInfo[utf8('L')][utf8('ClusterName')]=utf8('<General Services
Cluster>');
system keyspace is not user-modifiable.
InvalidRequestException(why:system keyspace is not user-modifiable.)
at
org.apache.cassandra.thrift.Cassandra$insert_result.read(Cassandra.java:15974)
at org.apache.thrift.TServiceClient.receiveBase(TServiceClient.java:78)
at org.apache.cassandra.thrift.Cassandra$Client.recv_insert(Cassandra.java:797)
at org.apache.cassandra.thrift.Cassandra$Client.insert(Cassandra.java:781)
at org.apache.cassandra.cli.CliClient.executeSet(CliClient.java:909)
at org.apache.cassandra.cli.CliClient.executeCLIStatement(CliClient.java:222)
at
org.apache.cassandra.cli.CliMain.processStatementInteractive(CliMain.java:219)
at org.apache.cassandra.cli.CliMain.main(CliMain.java:346)
I have to remove the data directory in order to change the cluster name.
Luckily it's my testing box, so no harm. Just wondering what has been changed
not to allow the modification through cli? What is the way of changing the
cluster name without wiping out all the data now?
Thanks.
-Wei
