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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 Sat, 10 Nov 2012 00:13:12 GMT

    [ https://issues.apache.org/jira/browse/ACCUMULO-708?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13494455#comment-13494455
] 

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

I applied the patch and have been unable to get the unit test to run.  Keep seeing something
like the following

{noformat}
Caused by: java.lang.NullPointerException
	at org.apache.hadoop.hdfs.MiniDFSCluster.startDataNodes(MiniDFSCluster.java:422)
	at org.apache.hadoop.hdfs.MiniDFSCluster.<init>(MiniDFSCluster.java:280)
	at org.apache.accumulo.test.AccumuloDFSBase.<clinit>(AccumuloDFSBase.java:66)
	... 21 more
{noformat}

bq. Where should this be documented? User guide, readme, etc?
Maybe add something to the users guide and add an example that shows off what can be done.
                
> 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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