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https://issues.apache.org/jira/browse/ACCUMULO-1321?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13645034#comment-13645034
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John Vines commented on ACCUMULO-1321:
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With the recreating of VFS to get around the issues, they are not counting. But
that's a hack around the other issue.
I don't think class unloading would actually help. The issue is that the
Resource and the actual file get out of sync, so when it uses the Resource to
determine if the jar is accurate it gets a truncated file exception. I would
think it would be a class unloading issue if it failed to show any changes with
a new jar.
> 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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