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From "Dave Marion (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ACCUMULO-708) Modify ClassLoader to support different applications / multi-tenancy
Date Mon, 29 Oct 2012 03:15:12 GMT

    [ https://issues.apache.org/jira/browse/ACCUMULO-708?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13485808#comment-13485808
] 

Dave Marion commented on ACCUMULO-708:
--------------------------------------


 Thanks Josh. I used /accumulo/classpath as an example, it made sense to me. In reality though,
it could be any location as long as it can be read by the OS user. I did not modify the assembly;
by default 'classloader.vfs.enabled' is false and in this case the AccumuloClassLoader will
be used (not the new AccumuloVFSClassLoader). In this default case, the jars will need to
remain where they are now. I figure that this new classloader will need to be tested thoroughly
(I expect a few issues will arise); so I think it makes sense to keep it experimental for
now. Assuming all of the tests pass, Accumulo will still need to be modified to take advantage
of the different contexts.
                
> Modify ClassLoader to support different applications / multi-tenancy
> --------------------------------------------------------------------
>
>                 Key: ACCUMULO-708
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-708
>             Project: Accumulo
>          Issue Type: Improvement
>          Components: start
>            Reporter: Dave Marion
>            Assignee: Dave Marion
>              Labels: classloader
>             Fix For: 1.5.0
>
>         Attachments: ACCUMULO-708-1.patch
>
>   Original Estimate: 24h
>          Time Spent: 33h
>  Remaining Estimate: 0h
>
> I'd like to expand the current classloader to support loading classes from HDFS and different
application contexts. I'll be modifying the ticket as the idea matures.

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