Github user massie commented on the pull request:
https://github.com/apache/spark/pull/6423#issuecomment-113300714
@kayousterhout, Thanks for reviewing this PR. I agree that we should be
more defensive moving forward. I think the right next step (no pun intended) is
to [Update ShuffleBlockFetcherIterator.next to close previous stream when
returning a new one](https://issues.apache.org/jira/browse/SPARK-8454). That
would prevent any ShuffleReader from leaking memory or file handles.
@rxin I just pushed an update that I believe addresses all your comments.
Let me know if I missed anything.
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