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https://issues.apache.org/jira/browse/CASSANDRA-21286?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18072042#comment-18072042
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Paul Chandler commented on CASSANDRA-21286:
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Hi [~samt]
Thanks for responding to this. This turns out to be user error :( I had left
the rpc_address to localhost, the default in the cassandra.yaml, once I had
changed this to the correct loopback address, everything worked, and I now have
a working cluster.
I will close this ticket.
> Multiple nodes on one machine does not work for 6.0
> ---------------------------------------------------
>
> Key: CASSANDRA-21286
> URL: https://issues.apache.org/jira/browse/CASSANDRA-21286
> Project: Apache Cassandra
> Issue Type: Bug
> Components: Transactional Cluster Metadata
> Reporter: Paul Chandler
> Priority: Normal
>
> I have a setup for testing which has worked for 4.x and 5.0. This is to run
> multiple nodes on one machine, using multiple loopback addresses 127.0.0.1,
> 127.0.0.2 and 127.0.0.3
> All the ports stay the same and bind to the different loopback addresses,
> except for the JMX port which always binds to 127.0.0.1 so the jmx port is
> set to 7199, 7198,7197
> So this works for 4.x and 5.0 and I have used this setup to test upgrades in
> the past.
> However now when I to the same with Cassandra 6, when the second node starts,
> it fails with the following error messages
> {code:java}
> INFO [main] 2026-04-05T16:28:52,935 Gossiper.java:2062 - No gossip backlog;
> proceedingException (java.lang.IllegalStateException) encountered during
> startup: Can not commit transformation: "INVALID"(New addresses
> NodeAddresses{broadcastAddress=/127.0.0.2:7000, localAddress=/127.0.0.2:7000,
> nativeAddress=/127.0.0.1:9042} conflicts with existing node NodeId{id=1} with
> addresses NodeAddresses{broadcastAddress=localhost/127.0.0.1:7000,
> localAddress=localhost/127.0.0.1:7000,
> nativeAddress=localhost/127.0.0.1:9042}).java.lang.IllegalStateException: Can
> not commit transformation: "INVALID"(New addresses
> NodeAddresses{broadcastAddress=/127.0.0.2:7000, localAddress=/127.0.0.2:7000,
> nativeAddress=/127.0.0.1:9042} conflicts with existing node NodeId{id=1} with
> addresses NodeAddresses{broadcastAddress=localhost/127.0.0.1:7000,
> localAddress=localhost/127.0.0.1:7000,
> nativeAddress=localhost/127.0.0.1:9042}). at
> org.apache.cassandra.tcm.ClusterMetadataService.lambda$commit$6(ClusterMetadataService.java:581)
> at
> org.apache.cassandra.tcm.ClusterMetadataService.commit(ClusterMetadataService.java:625)
> at
> org.apache.cassandra.tcm.ClusterMetadataService.commit(ClusterMetadataService.java:578)
> at
> org.apache.cassandra.tcm.transformations.Register.register(Register.java:148)
> at
> org.apache.cassandra.tcm.transformations.Register.register(Register.java:135)
> at
> org.apache.cassandra.tcm.transformations.Register.register(Register.java:123)
> at
> org.apache.cassandra.tcm.transformations.Register.register(Register.java:166)
> at
> org.apache.cassandra.tcm.transformations.Register.maybeRegister(Register.java:117)
> at
> org.apache.cassandra.service.StorageService.initServer(StorageService.java:854)
> at
> org.apache.cassandra.service.CassandraDaemon.setup(CassandraDaemon.java:396)
> at
> org.apache.cassandra.service.CassandraDaemon.activate(CassandraDaemon.java:836)
> at
> org.apache.cassandra.service.CassandraDaemon.main(CassandraDaemon.java:990)
> {code}
> Specifically it looks like the nativeAddress is not correct here:
> "INVALID"(New addresses NodeAddresses{broadcastAddress=/127.0.0.2:7000,
> localAddress=/127.0.0.2:7000, nativeAddress={*}/127.0.0.1:9042{*}}
> I have tested this as a new cluster pure 6.0 and also as an upgrade from 5.0,
> and both fail.
>
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