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https://issues.apache.org/jira/browse/HADOOP-5919?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12713865#action_12713865
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eric baldeschwieler commented on HADOOP-5919:
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You are suggesting that it is possible to have an empty list of new variables
to map to the old.
In this case a set should be a noop that prints a WARNING, correct?
> Memory management variables need a backwards compatibility option after
> HADOOP-5881
> -----------------------------------------------------------------------------------
>
> Key: HADOOP-5919
> URL: https://issues.apache.org/jira/browse/HADOOP-5919
> Project: Hadoop Core
> Issue Type: Bug
> Components: mapred
> Reporter: Hemanth Yamijala
> Priority: Blocker
>
> HADOOP-5881 modified variables related to memory management without looking
> at the backwards compatibility angle. This JIRA is to adress the gap. Marking
> it a blocker for 0.20.1
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