Github user smola commented on the pull request:
https://github.com/apache/spark/pull/3645#issuecomment-69569760
@pwendell Right. The problem is that there is no way to force the use of a
given IP (ignoring reverse lookups or any other hostname/ip detection
mechanisms).
I get this on Docker, the default set up is something like this:
Spark worker:
- IP: 172.17.0.11
- Hostname: hashone
Spark driver:
- IP: 172.17.0.12
- Hostname: hashtwo
Spark worker cannot resolve `hashtwo` and Spark driver cannot resolve
`hashone`. At some point, Spark worker throws an exception because it's trying
to resolve `hashtwo` instead of just contacting `172.17.0.12`.
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