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https://issues.apache.org/jira/browse/HBASE-13897?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14589232#comment-14589232
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Liu Junhong commented on HBASE-13897:
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It is for the case where Import generates HFiles, but only avoid the oom in
the reduce step and the reduce just do context.write.
If we skip the reduce step, we will do more split hfile in completebulkload.
> OOM occurs when Import importing a row that including too much KeyValue
> ------------------------------------------------------------------------
>
> Key: HBASE-13897
> URL: https://issues.apache.org/jira/browse/HBASE-13897
> Project: HBase
> Issue Type: Bug
> Affects Versions: 0.98.13
> Reporter: Liu Junhong
> Assignee: Ted Yu
> Fix For: 0.98.13
>
> Attachments: HBASE-13897-0.98.patch
>
>
> When importing a row with too many KeyValues (may have too many columns or
> versions)，KeyValueReducer will incur OOM.
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