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https://issues.apache.org/jira/browse/MAPREDUCE-7055?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16368435#comment-16368435
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Rohith Sharma K S commented on MAPREDUCE-7055:
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I don't have any patch applied in my cluster. I always build from trunk and
deploy every time freshly. Last time I deployed is last week, it was working.
Immediately started failing with this exception. Let me deploy manually again
and test it.
> 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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