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https://issues.apache.org/jira/browse/HBASE-20361?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16429808#comment-16429808
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Yuki Tawara commented on HBASE-20361:
-------------------------------------
Hi, [[email protected]]
Thank you for your comments!
I reflected your comments(change the method name, add javadoc for the classes)
and made trivial changes(make visibility of the classes private, fix a typo in
the subject).
Could you check my second patch?
> Non-successive TableInputSplits may wrongly be merged by auto balancing
> feature
> -------------------------------------------------------------------------------
>
> Key: HBASE-20361
> URL: https://issues.apache.org/jira/browse/HBASE-20361
> Project: HBase
> Issue Type: Bug
> Components: mapreduce
> Reporter: Yuki Tawara
> Priority: Major
> Attachments: HBASE-20361.master.001.patch,
> HBASE-20361.master.002.patch
>
>
> TableInputFormatBase class offers users a mechanism to exclude specific
> splits from returned list of TableInputFormatBase#getSplits through
> TableInputFormatBase#includeRegionInSplit.
> It also offers users a feature called "auto balancing" to mitigate data skew
> by splitting large splits and merging small splits.
> If a user overrides TableInputFormatBase#includeRegionInSplit, i th split and
> i+1 th split may not be successive(i th split's end key is smaller than i+1
> th split's start key).
> If he or she further enable auto balancing feature, non-successive splits can
> be merged, which means excluded splits between merged non-successive splits
> "revive".
> To avoid such cases, we should not merge non-successive splits.
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