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https://issues.apache.org/jira/browse/HBASE-1861?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13015259#comment-13015259
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Nichole Treadway commented on HBASE-1861:
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I've been testing this in 0.90.2. I found that some reduce tasks fail with a
File Not Found exception if there are no keys in the input data which would
fall into the region assigned to that reduce task.
>From what I can determine, it seems that an output directory is created in the
>write() method and expected to exist in the writeMetaData() method...if there
>are no keys to be written for that reduce task, the write method is never
>called, but writeMetaData is expecting the output directory to exist...thus
>the FnF exception.
Simply checking if the file exists should fix the issue. I've patched this on
my end...should I post my fix here?
> Multi-Family support for bulk upload tools (HFileOutputFormat / loadtable.rb)
> -----------------------------------------------------------------------------
>
> Key: HBASE-1861
> URL: https://issues.apache.org/jira/browse/HBASE-1861
> Project: HBase
> Issue Type: Improvement
> Components: mapreduce
> Affects Versions: 0.20.0
> Reporter: Jonathan Gray
> Assignee: Nicolas Spiegelberg
> Fix For: 0.92.0
>
> Attachments: HBASE1861-incomplete.patch
>
>
> Add multi-family support to bulk upload tools from HBASE-48.
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