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https://issues.apache.org/jira/browse/ACCUMULO-1321?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13644975#comment-13644975
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John Vines commented on ACCUMULO-1321:
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Alright, I checked it in. When loading out of HDFS, the files never get cleaned
up, even when shutting down. So this is something that we're going to have to
deal with. The only other potential issue is that the hdfs loader drops the
jars in with an arbitrary identifier included in the name, so if things aren't
cleaned up I wonder if we could potentially hit a collision causing an error
similar to what we're seeing now.
> 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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