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https://issues.apache.org/jira/browse/MAPREDUCE-3415?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13151482#comment-13151482
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Alejandro Abdelnur commented on MAPREDUCE-3415:
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One solution is to have a 'JarFinder' class that looks for the classpath
element of the class, if the classpath element is a JAR return its path. And,
if the classpath element is a directory, create a JAR file on the fly (in a
temp dir) with all the contents of the classpath element directory and return
the path to that file.
> improve MiniMRYarnCluster & DistributedShell JAR resolution
> ------------------------------------------------------------
>
> Key: MAPREDUCE-3415
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-3415
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Components: mrv2
> Affects Versions: 0.24.0, 0.23.1
> Reporter: Alejandro Abdelnur
> Assignee: Alejandro Abdelnur
> Fix For: 0.24.0, 0.23.1
>
>
> Current JAR resolution assumes the following:
> # The class used for JAR lookup is effectively in a JAR
> # A System property is set for testing with the location of the JAR
> The problem with #1 is that in some cases (when using the class in the same
> Maven module where the class is, the class is not in a JAR but in a directory
> 'target/test-classes').
> The problem with #2 is the JAR does not exists at the time of running the
> test (packaging comes after test and we are not doing integration testing yet
> thus won't work)
> In addition, this is required for streaming testcases, to have the JAR with
> streaming classes for testing.
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