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https://issues.apache.org/jira/browse/CASSANDRA-18317?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17773444#comment-17773444
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Yifan Cai commented on CASSANDRA-18317:
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+1 on the fix patch in 4.0 and the test addition patches in the other branches.
Thank you!
> Properly synchronize CQLSSTableWriter#build on the Schema.instance
> ------------------------------------------------------------------
>
> Key: CASSANDRA-18317
> URL: https://issues.apache.org/jira/browse/CASSANDRA-18317
> Project: Cassandra
> Issue Type: Bug
> Components: Tool/bulk load
> Reporter: Francisco Guerrero
> Assignee: Francisco Guerrero
> Priority: Normal
> Time Spent: 50m
> Remaining Estimate: 0h
>
> The {{CQLSSTableWriter#build}} method should properly synchronize on the
> {{Schema.instance}} class to prevent concurrent Schema operations fail, [when
> the offline tool also updates schema].
> For example, a table creation operation, which modifies the keyspaces tables
> metadata, might end up missing the update when a concurrent call to the
> {{CQLSSTableWriter#build}} method is accessing the {{Schema}} instance.
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