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https://issues.apache.org/jira/browse/ACCUMULO-1321?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13645105#comment-13645105
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John Vines commented on ACCUMULO-1321:
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Yeah, that was my consensus on it as well. Unfortunately there is the
possibility that the previous VFS is still in use by a running classloader so
running close on the old before the new can potentially cause some devastating
issues. I think just issuing deleteOnExit flags for the Files should delete
them when the VFS gets garbage collected, wouldn't it?
> Dynamic Classloader lost jars
> -----------------------------
>
> Key: ACCUMULO-1321
> URL: https://issues.apache.org/jira/browse/ACCUMULO-1321
> Project: Accumulo
> Issue Type: Sub-task
> Reporter: John Vines
> Assignee: Keith Turner
> Priority: Blocker
> Fix For: 1.5.0
>
> Attachments: ACCUMULO-1321.patch
>
>
> We have a table setup that uses some custom iterators. We ran an MR job
> against it without issues. We then ran the job immediately after the first
> one wrapped and 2 of my tservers errored with ClassNotFoundException, even
> though it ran just fine before.
> Unfortunately we don't have a stack trace (to see if it was breaking
> differently in the VFSClassLoader), nor a convenient way to recreate
> currently. We're working on reproducing it in order to get more information.
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