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https://issues.apache.org/jira/browse/HIVE-1806?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12971987#action_12971987
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Ning Zhang commented on HIVE-1806:
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dyn_part_empty.q is having intermittent failures. I tried the clean trunk and
it sometimes fails as well. The failure is not critical -- exception was
printed to log file rather than console. It should not be caused by this patch.
However, I did find 2 diffs in skewjoin.q and bucketmapjoin2.q. The former has
a simple fix. I'm looking at why bucketmapjoin2.q has a slightly different
plan.
> The merge criteria on dynamic partitons should be per partiton
> --------------------------------------------------------------
>
> Key: HIVE-1806
> URL: https://issues.apache.org/jira/browse/HIVE-1806
> Project: Hive
> Issue Type: Bug
> Reporter: Ning Zhang
> Assignee: Ning Zhang
> Attachments: HIVE-1806.patch
>
>
> Currently the criteria of whether a merge job should be fired on dynamic
> generated partitions are is the average file size of files across all dynamic
> partitions. It is very common that some dynamic partitions contains mostly
> large files and some contains mostly small files. Even though the average
> size of the total files are larger than the hive.merge.smallfiles.avgsize, we
> should merge those partitions containing small files only.
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