Github user jerryshao commented on the pull request:
https://github.com/apache/spark/pull/12994#issuecomment-218050017
@tgravescs , I tested locally using Hadoop 2.4 and 2.6 with different
scenarios:
1. Only Hadoop 2.4
2. Hadoop 2.4 upgrade to 2.6 with NM recovery disabled.
3. Hadoop 2.4 upgrade to 2.6 with NM recovery enabled.
3. Hadoop 2.6 NM recovery disabled to enabled.
Looks fine in all these scenarios.
One missing part is do we need to take care of downgrade scenarios, like
2.6 to 2.4 or NM recovery enabled to disabled?
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