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https://issues.apache.org/jira/browse/CASSANDRA-18358?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Claude Warren reassigned CASSANDRA-18358:
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Assignee: Claude Warren
> Fix issue with system.local.broadcast_port when downgrading to v3
> -----------------------------------------------------------------
>
> Key: CASSANDRA-18358
> URL: https://issues.apache.org/jira/browse/CASSANDRA-18358
> Project: Cassandra
> Issue Type: Bug
> Reporter: Claude Warren
> Assignee: Claude Warren
> Priority: Normal
>
> {{system.local}} table 4.0 format adds the {{broadcast_port}} column. There
> is no way to make 3.x ignore it when we try to downgrade.
> There are some tables that are defined in code. (e.g. system.local)
> When v3 sstable schema for these tables detects:
> * a column in the sstable schema that is not in the data schema it creates a
> deleted column in the data schema.
> * a column in the data schema that is not in the sstable schema it throws an
> exception.
>
> There are two basic approaches to solve this:
> * rewrite the data so that the additional column is removed. This is an
> expensive process.
> * rework the code so that columns in the data but not in the table are
> ignored for this class of tables (statically defined in code).
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