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https://issues.apache.org/jira/browse/SPARK-3018?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14098029#comment-14098029
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Reynold Xin commented on SPARK-3018:
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This is actually a fairly involved ticket (and the relevant source code is not
checked in yet). Perhaps try a different one?
> Release all BlockFetcherIterator upon task completion/failure
> -------------------------------------------------------------
>
> Key: SPARK-3018
> URL: https://issues.apache.org/jira/browse/SPARK-3018
> Project: Spark
> Issue Type: Sub-task
> Components: Shuffle, Spark Core
> Reporter: Reynold Xin
>
> BlockFetcherIterator retains ReferenceCountedBuffers returned by
> client.fetchBlocks. Those buffers are released when the iterators are
> traversed fully. In the case of task failures or completion without
> exhausting the iterator, this could lead to memory leak.
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