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From "Sean Busbey (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-13070) classloading isolation improvements for cleaner and stricter dependencies
Date Fri, 29 Apr 2016 18:12:13 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-13070?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15264464#comment-15264464
] 

Sean Busbey commented on HADOOP-13070:
--------------------------------------

[~andrew.wang] and I were just earlier in the week discussing getting an approach like this
in place as a first step to see if it would suffice for HADOOP-11656. Super glad to see more
folks interested. On the launcher side, I'm planning to pick HADOOP-11804 back up in the next
few weeks.

Sangjin do let me know if there's anything I can help with on this, wether it's reviews or
early work testing out approaches.

> classloading isolation improvements for cleaner and stricter dependencies
> -------------------------------------------------------------------------
>
>                 Key: HADOOP-13070
>                 URL: https://issues.apache.org/jira/browse/HADOOP-13070
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: util
>            Reporter: Sangjin Lee
>            Assignee: Sangjin Lee
>            Priority: Critical
>
> Related to HADOOP-11656, we would like to make a number of improvements in terms of classloading
isolation so that user-code can run safely without worrying about dependency collisions with
the Hadoop dependencies.
> By the same token, it should raised the quality of the user code and its specified classpath
so that users get clear signals if they specify incorrect classpaths.
> This will contain a proposal that will include several improvements some of which may
not be backward compatible. As such, it should be targeted to the next major revision of Hadoop.



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