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https://issues.apache.org/jira/browse/SPARK-15178?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15275270#comment-15275270
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Apache Spark commented on SPARK-15178:
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User 'techaddict' has created a pull request for this issue:
https://github.com/apache/spark/pull/12977
> Remove LazyFileRegion
> ---------------------
>
> Key: SPARK-15178
> URL: https://issues.apache.org/jira/browse/SPARK-15178
> Project: Spark
> Issue Type: Improvement
> Components: Shuffle
> Affects Versions: 1.6.1
> Reporter: Thomas Graves
>
> LazyFileRegion was created so we didn't create a file descriptor before
> having to send the file. see
> https://issues.apache.org/jira/browse/SPARK-4307. The change has been pushed
> back into Netty to support the same things under the DefaultFileRegion.
> https://github.com/netty/netty/issues/3129
> https://github.com/netty/netty/commit/a4450b76d9c786f8b7f76e230938b0200a7188be
> It looks like that went into 4.0.25.Final. I believe at the time we created
> LazyFileRegion we were on 4.0.23.Final and we are now using 4.0.29.Final so
> we should be able to use the netty class directly.
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