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https://issues.apache.org/jira/browse/ACCUMULO-1411?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13656596#comment-13656596
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Dave Marion commented on ACCUMULO-1411:
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Does Thread.setContextClassloader() apply here?
                
> Cannot use iterators in MockAccumulo running in a secondary classloader
> -----------------------------------------------------------------------
>
>                 Key: ACCUMULO-1411
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-1411
>             Project: Accumulo
>          Issue Type: Bug
>          Components: start
>            Reporter: John Vines
>            Assignee: John Vines
>            Priority: Minor
>
> We have a situation where there is a test client which spins off a Thread 
> running a MockAccumulo, and then we try to use iterators that are on the 
> classpath for that Thread. Unfortunately, they CNFE. We've traced it back, 
> since the ReloadingClassLoader just uses the parent classloader 
> (AccumuloClassLoader) in absence of configurations. The 
> AccumuloClassLoader.getClassLoader uses ClassLoader.getSystemClassLoader() as 
> it's parent, not AccumuloClassLoader.class.getClassLoader(). I believe that 
> should preserve the way the classloaders work in the standard use cases while 
> not breaking in any other cases.

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