Github user kellyzly commented on the pull request:
https://github.com/apache/spark/pull/4491#issuecomment-77786426
@srowen,@tgravescs,@vanzin: Encrypted shuffle can make the process of
shuffle more safer. I think it is necessary in spark. Previous design is
reusing hadoop encrypted shuffle algorithm to enable spark encrypted shuffle.
The design has a big problem that it imports many crypto classes like
CryptoInputStream and CryptoOutputStream which is marked "private" in hadoop.
Now my teammates and i decided to write the crypto classes in spark so no
dependance to hadoop 2.6. Not directly copying hadoop code to spark, we only
reference the crypto algorithm like JCE/AES-NI which is used in hadoop. Maybe i
need rename the jira name from "Reuse hadoop encrypted shuffle algorithm to
enable spark encrypted shuffle" to "Add encrypted shuffle in spark". Any
advices are welcome.
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