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From "Keith Turner (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ACCUMULO-708) Modify ClassLoader to support different applications / multi-tenancy
Date Thu, 08 Nov 2012 23:00:12 GMT

    [ https://issues.apache.org/jira/browse/ACCUMULO-708?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13493588#comment-13493588
] 

Keith Turner commented on ACCUMULO-708:
---------------------------------------

I scanned through the patch trying to get a sense of it at the high level.  Tomorrow I will
do a more in depth review.  Have a few comments so far.

 * use general prefix for new config properties.  general denotes its a configuration for
all services (i.e. master, tserver, etc)
 * needs documentation.  How does a user know this feature exists and what they can do with
it?
 * probably should not use org/apache/commons/vfs2 package.   If the commons project defines
classes with same name and user loads Accumulo and Commons jar chaos could ensue.
 * I noticed there were a few accumulo site files introduced.  Are these for testing?   Some
of them configured walog dirs which is no longer nesc in 1.5.

                
> 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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