Github user pwendell commented on the pull request:
https://github.com/apache/spark/pull/629#issuecomment-42158974
Thanks @srowen! I tested this and it seems to work well (tests below).
Comments are inline. My main thoughts were:
1. It might be nicer to ask people to always set `hadoop.version`, it's
just a bit more explicit and IMO less confusing. Of course, advanced users can
rely on the profile to set the version.
2. It could be nice to make distinct profiles for 2.3 and 2.4... then it
will be clear to users if they want to build against 2.5+ they are in uncharted
territory, since we can't officially support those builds until they come out.
```
mvn -Pyarn -Phadoop-2.3 -DskipTests clean package
./bin/spark-shell
scala>
sc.textFile("s3n://big-data-benchmark/pavlo/text/tiny/rankings/").count
res1: Long = 1200
```
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