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From "Sangjin Lee (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HADOOP-13070) classloading isolation improvements for cleaner and stricter dependencies
Date Sat, 07 May 2016 01:13:13 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-13070?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Sangjin Lee updated HADOOP-13070:
---------------------------------
    Attachment: classloading-improvements-ideas.pdf

I have posted a short document for the classloading improvements ideas to spur the discussion.
Especially, I went into the details of the idea of the stricter class space separation (between
user and system) and discussed implications.

Your feedback and thoughts are most welcome. Thanks!

> 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
>         Attachments: classloading-improvements-ideas.pdf
>
>
> 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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