Github user kanzhang commented on the pull request:
https://github.com/apache/spark/pull/1338#issuecomment-50207653
@JoshRosen hi, thanks for your detailed explanation. I'm not sure I get
your point or maybe I didn't make myself clear. I'm mainly concerned about the
case of reading sequence files and was looking to see if I could unpersist the
broadcasted Hadoop conf used by the read job. What I can gather from your note
is that the answer is no, I can't unpersist the conf since the RDD may not have
been fully read in after the RDD.first() call, right?
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