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https://issues.apache.org/jira/browse/MAPREDUCE-7055?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16368423#comment-16368423
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Shane Kumpf commented on MAPREDUCE-7055:
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[~rohithsharma] - Thanks for reporting this. I'm currently not able to recreate
this issue on trunk, but maybe it is configuration related.
I did see similar classpath related issues with the original patch in
YARN-7677, but not with the reworked patch. Do you maybe have the old patch
applied? does reverting that commit fix the issue?
> MR jobs are failing with Could not find or load main class for MRAppMaster
> --------------------------------------------------------------------------
>
> Key: MAPREDUCE-7055
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-7055
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Affects Versions: 3.1.0, 3.2.0
> Reporter: Rohith Sharma K S
> Priority: Blocker
>
> It is observed that MR jobs are failing with *Error: Could not find or load
> main class org.apache.hadoop.mapreduce.v2.app.MRAppMaster" even though
> HADOOP_MAPRED_HOME is set in mapred-site.xml
> Tried building tar.gz in branch-3.0 and seems works fine with same
> configurations. But in branch-3.1 and trunk, it is failing. I got
> launch_container.sh for both and compared classpath exported before
> launching AM. Both classpath entries are same, but AM launching is failing
> with above mentioned error.
> Its better to confirm as 3.1 release is going to happen soon.
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