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https://issues.apache.org/jira/browse/CASSANDRA-13180?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15851503#comment-15851503
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Aleksey Yeschenko commented on CASSANDRA-13180:
-----------------------------------------------
+1
> Better handling of missing entries in system_schema.columns during startup
> --------------------------------------------------------------------------
>
> Key: CASSANDRA-13180
> URL: https://issues.apache.org/jira/browse/CASSANDRA-13180
> Project: Cassandra
> Issue Type: Improvement
> Components: Distributed Metadata
> Reporter: Tyler Hobbs
> Assignee: Tyler Hobbs
> Fix For: 3.0.x, 3.x
>
>
> Like the error in CASSANDRA-12213 and CASSANDRA-12165, it's possible for
> {{system_schema.keyspaces}} and {{tables}} to contain entries for a table
> while {{system_schema.columns}} has none. This produces an error during
> startup, and there's no way for a user to recover from this without restoring
> from backups.
> Although this has been seen in the wild on one occasion, the cause is still
> not entirely known. (It may be due to a concurrent DROP TABLE and ALTER
> TABLE where a table property is altered.) Until we know the root cause, it
> makes sense to give users a way to recover from that situation.
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