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From "Eric Payne (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (MAPREDUCE-3456) $HADOOP_PREFIX/bin/yarn should set defaults for $HADOOP_*_HOME
Date Tue, 22 Nov 2011 23:32:39 GMT
$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

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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