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https://issues.apache.org/jira/browse/HBASE-4356?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13100723#comment-13100723
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Todd Lipcon commented on HBASE-4356:
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Dup of HBASE-3421?
> Wide rows can cause OOME when compacting
> ----------------------------------------
>
> Key: HBASE-4356
> URL: https://issues.apache.org/jira/browse/HBASE-4356
> Project: HBase
> Issue Type: Bug
> Affects Versions: 0.90.4
> Reporter: Nate Putnam
>
> The scanner used for compaction doesn't limit the number of columns retrieved
> when doing a compaction. If a row exists with tens of millions of rows it can
> fill all available memory and crash the region server.
> It would be better if the scanner could page through the columns of wide rows
> when performing a compaction.
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