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https://issues.apache.org/jira/browse/HADOOP-11257?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14195009#comment-14195009
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Masatake Iwasaki commented on HADOOP-11257:
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The problem seems to be that {{hadoop jar}} (partially) works for mapred and
yarn apps because classpath setting for {{hadoop}} command includes all of
common, hdfs, mapred and yarn libs. How about showing warnings if the env var
which is only handled by {{mapred}} or {{yarn}} command is set?
> Deprecate 'hadoop jar'
> ----------------------
>
> Key: HADOOP-11257
> URL: https://issues.apache.org/jira/browse/HADOOP-11257
> Project: Hadoop Common
> Issue Type: Improvement
> Reporter: Allen Wittenauer
>
> Given that 'hadoop jar' and 'yarn jar' work differently, we should mark
> 'hadoop jar' as deprecated in 2.7 and remove it in trunk.
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