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From "Keith Turner (JIRA)" <>
Subject [jira] [Commented] (ACCUMULO-1321) Dynamic Classloader lost jars
Date Fri, 03 May 2013 16:02:15 GMT


Keith Turner commented on ACCUMULO-1321:

bq. The original issue we're working around - that different references to different versions
get held onto in the VFS (I believe that was the issue)

I am not sure if this a VFS issue or if we were using it improperly.  Maybe a question on
their mailing list?

I asked a question about the collision behavior and have not seen an answer to that.  Maybe
that should be a ticket.

Also if the DefaultFilesystemManager does not have a finalize, that may be worth a ticket.

> Dynamic Classloader lost jars
> -----------------------------
>                 Key: ACCUMULO-1321
>                 URL:
>             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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