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https://issues.apache.org/jira/browse/MAPREDUCE-4250?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13276025#comment-13276025
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Ahmed Radwan commented on MAPREDUCE-4250:
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+1 for the patch. Thanks Patrick!
> hadoop-config.sh missing variable exports, causes Yarn jobs to fail with
> ClassNotFoundException MRAppMaster
> -----------------------------------------------------------------------------------------------------------
>
> Key: MAPREDUCE-4250
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-4250
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: nodemanager
> Reporter: Patrick Hunt
> Assignee: Patrick Hunt
> Attachments: MAPREDUCE-4250.patch
>
>
> This is the MR side of HADOOP-8393
> If you start a pseudo distributed yarn using "start-yarn.sh" you need to
> specify exports for HADOOP_COMMON_HOME, HADOOP_HDFS_HOME, YARN_HOME,
> YARN_CONF_DIR, and HADOOP_MAPRED_HOME in hadoop-env.sh (or elsewhere),
> otherwise the spawned node manager will be missing
> these in it's environment. This is due to start-yarn using yarn-daemons. With
> this fix it's possible to start yarn (etc...) with only HADOOP_CONF_DIR
> specified in the environment. Took some time to track down this failure, so
> seems worthwhile to fix.
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