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https://issues.apache.org/jira/browse/HIVE-17660?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16459047#comment-16459047
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Eugene Koifman commented on HIVE-17660:
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see if this is still relevant after HIVE-19124
> Compaction for MM runs Cleaner - needs test once IOW is supported
> -----------------------------------------------------------------
>
> Key: HIVE-17660
> URL: https://issues.apache.org/jira/browse/HIVE-17660
> Project: Hive
> Issue Type: Sub-task
> Components: Transactions
> Reporter: Eugene Koifman
> Assignee: Eugene Koifman
> Priority: Major
>
> Deletion of aborted deltas happens from CompactorMR.run() i.e. from Worker
> but the Worker still sets compaction_queue entry to READY_FOR_CLEANING.
> This is not needed if there are no base_N dirs which can be created by Insert
> Overwrite
> In this case we can't delete deltas < N until we know no one is reading them,
> i.e. in Cleaner
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