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https://issues.apache.org/jira/browse/CASSANDRA-11071?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15119210#comment-15119210
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Mike Adamson commented on CASSANDRA-11071:
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[~iamaleksey] Yes, it fixes an inconsistency between the tables returned by
{{cqlsh> describe tables;}} and {{nodetool tablesstats}}.
> Invalidate legacy schema CFSs at startup
> ----------------------------------------
>
> Key: CASSANDRA-11071
> URL: https://issues.apache.org/jira/browse/CASSANDRA-11071
> Project: Cassandra
> Issue Type: Bug
> Components: Distributed Metadata, Lifecycle
> Reporter: Sam Tunnicliffe
> Assignee: Mike Adamson
> Priority: Minor
> Fix For: 3.0.x, 3.x
>
>
> {{ColumnFamilyStore}} instances are created for legacy schema tables at
> startup when {{SystemKeyspace}} is initialized as they may be required for
> schema migration during upgrade. Before startup completes, the schema info
> for these is expunged from {{system_schema}}, but the {{CFS}} instances are
> not invalidated, which leaves their mbeans registered and visible via
> nodetool & JMX.
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