[jira] [Commented] (CASSANDRA-4843) When upgrading from 1.1.6 to 1.20 change in partitioner causes nodes not to start

["Edward Capriolo (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CASSANDRA-4843?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13480973#comment-13480973 ] 

Edward Capriolo commented on CASSANDRA-4843:
--------------------------------------------

The error message is strange as well.

Changing paritioner on a existing cluster can cause data loose, Please verify your partitioner in cassandra.yaml

"Can cause data *loss" is impossible because Cassandra will not even start. If it did start it would definitely cause data loss.
                
> When upgrading from 1.1.6 to 1.20 change in partitioner causes nodes not to start
> ---------------------------------------------------------------------------------
>
>                 Key: CASSANDRA-4843
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-4843
>             Project: Cassandra
>          Issue Type: Bug
>            Reporter: Edward Capriolo
>
> ERROR 10:17:20,341 Cannot open /home/edward/cassandra/data/system/schema_keyspaces/system-schema_keyspaces-hf-1 because partitioner does not match org.apache.cassandra.dht.RandomPartitioner != org.apache.cassandra.dht.Murmur3Partitioner
> This is because 1.2 has a new default partitioner, why are we changing the default? Is this wise? The current partitioner has been rock solid for years. 
> Should the previously known partition be stored in the schema like the previously know seed nodes, and schema?

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