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https://issues.apache.org/jira/browse/SPARK-4264?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Aaron Davidson resolved SPARK-4264.
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Resolution: Fixed
> SQL HashJoin induces "refCnt = 0" error in ShuffleBlockFetcherIterator
> ----------------------------------------------------------------------
>
> Key: SPARK-4264
> URL: https://issues.apache.org/jira/browse/SPARK-4264
> Project: Spark
> Issue Type: Bug
> Affects Versions: 1.2.0
> Reporter: Aaron Davidson
> Assignee: Aaron Davidson
> Priority: Blocker
>
> This is because it calls hasNext twice, which invokes the completion iterator
> twice, unintuitively.
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