Github user srowen commented on the pull request:
https://github.com/apache/spark/pull/625#issuecomment-42101543
@scwf Yeah writing this up and testing it now, but I think it's possible to
do away with `yarn.version`. It should be synced up in general with
`hadoop.version` of course. Default `hadoop.version` is 1.0.4 though and there
is no such YARN version. But, `yarn-alpha` overrides to `hadoop.version=0.23.7`
anyway. Unless I miss something, I don't see the case where a legitimate build
has these unequal?
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