Github user sryza commented on the pull request:
https://github.com/apache/spark/pull/2338#issuecomment-55066419
Hi @davies , sorry for causing this bug and thanks for picking it up. To
avoid making the deep copy unnecessarily when running in non-local mode, we
could instead make it on the executor side, and only do so if isLocal = true.
Any issues you can see with that?
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