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https://issues.apache.org/jira/browse/HIVE-22918?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Marta Kuczora reassigned HIVE-22918:
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> Investigate empty bucket file creation for ACID tables
> ------------------------------------------------------
>
> Key: HIVE-22918
> URL: https://issues.apache.org/jira/browse/HIVE-22918
> Project: Hive
> Issue Type: Task
> Affects Versions: 4.0.0
> Reporter: Marta Kuczora
> Assignee: Marton Bod
> Priority: Major
>
> When creating an insert-only bucketed table with 5 buckets, and we insert
> only one row to this table, Hive creates empty files for the other 4 buckets.
> This logic is in the code for ACID tables as well, but when checking the
> table's final directory after the insert, I found that only 1 files got
> created. When debugged this issue, I found that the empty files are created
> in the staging directory outside the delta directory, therefore they won't
> get copied by the move task to the final directory. This behavior seems
> broken, but not sure if we really need the empty files in this case.
> This Jira is about investigating whether or not we need these empty files for
> ACID tables and if we do, fix the code to have them for ACID tables as well.
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