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https://issues.apache.org/jira/browse/MAPREDUCE-3456?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13160397#comment-13160397
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Mahadev konar commented on MAPREDUCE-3456:
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@Eric,
We can set $HADOOP_MR_HOME/COMMON/HDFS as
$HADOOP_PREFIX/hadoop-mapreduce/hadoop-common/hadoop-hdfs if HADOOP_PREFIX Is
already set.
> $HADOOP_PREFIX/bin/yarn should set defaults for $HADOOP_*_HOME
> --------------------------------------------------------------
>
> Key: MAPREDUCE-3456
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-3456
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: mrv2
> Affects Versions: 0.23.0
> Reporter: Eric Payne
> Assignee: Eric Payne
> Priority: Blocker
>
> If the $HADOOP_PREFIX/hadoop-dist/target/hadoop-0.23.0-SNAPSHOT.tar.gz
> tarball is used to distribute hadoop, all of the HADOOP components (HDFS,
> MAPRED, COMMON) are all under one directory. In this use case, HADOOP_PREFIX
> should be set and should point to the root directory for all components, and
> it should not be necessary to set HADOOP_HDFS_HOME, HADOOP_COMMON_HOME, and
> HADOOP_MAPRED_HOME. However, the $HADOOP_PREFIX/bin/yarn script requires
> these 3 to be set explicitly in the calling environment or it won't run.
> $HADOOP_PREFIX/bin/yarn should check if $HADOOP_PREFIX is set and, if it is,
> use that value for the 3 other HADOOP_*_HOME variables.
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