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https://issues.apache.org/jira/browse/MAPREDUCE-4416?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13411372#comment-13411372
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Kihwal Lee commented on MAPREDUCE-4416:
---------------------------------------

AM as well as mapper/reudcer fails, if run tests (e.g. {{TestChild}}) normally 
with {{-Pclover}}.

{noformat}
[CLOVER] FATAL ERROR: Clover could not be initialised. Are you sure you have 
Clover in the runtime classpath? (class 
java.lang.NoClassDefFoundError:com_cenqua_clover/CloverVersionInfo)
Exception in thread "main" java.lang.NoClassDefFoundError: 
com_cenqua_clover/CoverageRecorder
        at 
org.apache.hadoop.mapreduce.v2.app.MRAppMaster.main(MRAppMaster.java:1017)
{noformat}
                
> Some tests fail if Clover is enabled
> ------------------------------------
>
>                 Key: MAPREDUCE-4416
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4416
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: client, mrv2
>    Affects Versions: 2.0.0-alpha, 3.0.0
>            Reporter: Kihwal Lee
>            Priority: Critical
>             Fix For: 2.0.1-alpha, 3.0.0
>
>
> There are number of tests running under hadoop-mapreduce-client-jobclient 
> that fail if Clover is enabled. Whenever a job is launched, AM doesn't start 
> because it can't locate the clover jar file.
> It seems this started happening after MAPREDUCE-4253.

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