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From "Patrick Hunt (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HADOOP-8393) hadoop-config.sh missing variable exports, causes Yarn jobs to fail with ClassNotFoundException MRAppMaster
Date Fri, 11 May 2012 18:54:50 GMT
Patrick Hunt created HADOOP-8393:
------------------------------------

             Summary: hadoop-config.sh missing variable exports, causes Yarn jobs to fail
with ClassNotFoundException MRAppMaster
                 Key: HADOOP-8393
                 URL: https://issues.apache.org/jira/browse/HADOOP-8393
             Project: Hadoop Common
          Issue Type: Bug
          Components: scripts
            Reporter: Patrick Hunt
            Assignee: Patrick Hunt


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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