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From "Gary Helmling (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-8528) [hadoop2] TestMultiTableInputFormat always fails on hadoop with YARN-129 applied
Date Fri, 10 May 2013 23:05:17 GMT

    [ https://issues.apache.org/jira/browse/HBASE-8528?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13654997#comment-13654997

Gary Helmling commented on HBASE-8528:

Coincidentally, I've just been looking at the exact same problem when running against 2.0.4-alpha.
 Setting {{yarn.is.minicluster}} to "true" in the configuration solves the problem and in
effect does the same as your patch (at least in 2.0.4-alpha).
> [hadoop2] TestMultiTableInputFormat always fails on hadoop with YARN-129 applied
> --------------------------------------------------------------------------------
>                 Key: HBASE-8528
>                 URL: https://issues.apache.org/jira/browse/HBASE-8528
>             Project: HBase
>          Issue Type: Sub-task
>          Components: hadoop2, mapreduce, test
>    Affects Versions: 0.95.0
>            Reporter: Jonathan Hsieh
>            Assignee: Jonathan Hsieh
>             Fix For: 0.98.0, 0.95.1
>         Attachments: hbase-8528.patch
> TestMulitTableInputFormat always fails if YARN-129 is applied.  Its error message isn't
useful (assertion failed) -- but if you look at the stderr/stdout/syslog files of the jobs
in hbase-server/target/org.apache.hadoop.mapred.MiniMRCluster* (minicluster data dirs) you'll
find this class not found exception:
> {code}
> Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/hadoop/mapreduce/v2/app/MRAppMaster
> Caused by: java.lang.ClassNotFoundException: org.apache.hadoop.mapreduce.v2.app.MRAppMaster
>         at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
>         at java.security.AccessController.doPrivileged(Native Method)
>         at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
>         at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
>         at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
>         at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
> Could not find the main class: org.apache.hadoop.mapreduce.v2.app.MRAppMaster.  Program
will exit.
> {code}

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