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From "Allen Wittenauer (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HADOOP-12728) "hadoop jar my.jar" should probably prioritize my.jar in the classpath by default
Date Thu, 21 Jan 2016 19:41:39 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-12728?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Allen Wittenauer updated HADOOP-12728:
    Target Version/s: 3.0.0
        Hadoop Flags: Incompatible change

> "hadoop jar my.jar" should probably prioritize my.jar in the classpath by default
> ---------------------------------------------------------------------------------
>                 Key: HADOOP-12728
>                 URL: https://issues.apache.org/jira/browse/HADOOP-12728
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: scripts
>    Affects Versions: 2.7.1
>            Reporter: Ovidiu Gheorghioiu
>            Assignee: Allen Wittenauer
>            Priority: Minor
> Found this surprising behavior when testing a dev version of a jar that was already in
the hadoop classpath:    "hadoop jar ./my.jar" used the system my.jar, which was an old version
that did not contain my bug fix.  Since "hadoop jar" is the rough equivalent of running an
executable, it should use the  version passed on the command line.
> Even worse than my case (which took a while to figure out with log messages) is when
I'd be testing that the new version works the same as the old in some use case. Then I'd think
it did, even though the new version was completely broken.
> Allen mentioned verbally that there are some tricky aspects to this, but to open this
issue for tracking / brainstorming.

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