[jira] [Created] (YARN-6999) Add log about how to solve Error: Could not find or load main class org.apache.hadoop.mapreduce.v2.app.MRAppMaster

["Linlin Zhou (JIRA)" <ji...@apache.org>]

Linlin Zhou created YARN-6999:
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             Summary: Add log about how to solve Error: Could not find or load main class org.apache.hadoop.mapreduce.v2.app.MRAppMaster
                 Key: YARN-6999
                 URL: https://issues.apache.org/jira/browse/YARN-6999
             Project: Hadoop YARN
          Issue Type: Improvement
          Components: documentation, security
    Affects Versions: 3.0.0-beta1
         Environment: All operating systems.
            Reporter: Linlin Zhou
            Priority: Minor
             Fix For: 3.0.0-beta1


According Setting up a Single Node Cluster [https://hadoop.apache.org/docs/stable/hadoop-project-dist/hadoop-common/SingleCluster.html], we would still failed to run the MapReduce job example. Due to a security fix, yarn use user's environment variables to init, and user's environment variable usually doesn't include MapReduce related settings. So we need to add the related config in etc/hadoop/mapred-site.xml manually. Currently the log only tells there is an Error:
Could not find or load main class org.apache.hadoop.mapreduce.v2.app.MRAppMaster, without suggestion on how to solve it. I want to add the useful suggestion in log.



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