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https://issues.apache.org/jira/browse/HBASE-14339?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sean Busbey resolved HBASE-14339.
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Resolution: Duplicate
> HBase Bulk Load and super wide rows
> -----------------------------------
>
> Key: HBASE-14339
> URL: https://issues.apache.org/jira/browse/HBASE-14339
> Project: HBase
> Issue Type: Bug
> Reporter: Ted Malaska
> Priority: Minor
>
> This may not be a huge issues but it does come up. If the number of columns
> in a row are to many then KeyValueSortReducer will blow up with a out of
> memory exception, because it uses a TreeMap to sort the columns with in the
> memory of the reducer.
> A solution would be to add the column family and qualifier to the key so the
> shuffle would handle the sort.
> The partitioner would only partition on the rowKey but ordering would apply
> to the RowKey, Column Family, and Column Qualifier.
> Look at the Spark Bulk load as an example. HBASE-14150
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