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https://issues.apache.org/jira/browse/HIVE-7220?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14045424#comment-14045424
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Gopal V commented on HIVE-7220:
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Is the de-dup of locations only to work around the FileInputSplit in-mem + disk
location changes? (i.e 3 in-mem locations and 3 on-disk locations having
duplication?).
> Empty dir in external table causes issue (root_dir_external_table.q failure)
> ----------------------------------------------------------------------------
>
> Key: HIVE-7220
> URL: https://issues.apache.org/jira/browse/HIVE-7220
> Project: Hive
> Issue Type: Bug
> Reporter: Szehon Ho
> Assignee: Szehon Ho
> Attachments: HIVE-7220.2.patch, HIVE-7220.3.patch, HIVE-7220.4.patch,
> HIVE-7220.patch
>
>
> While looking at root_dir_external_table.q failure, which is doing a query on
> an external table located at root ('/'), I noticed that latest Hadoop2
> CombineFileInputFormat returns split representing empty directories (like
> '/Users'), which leads to failure in Hive's CombineFileRecordReader as it
> tries to open the directory for processing.
> Tried with an external table in a normal HDFS directory, and it also returns
> the same error. Looks like a real bug.
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