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Date: Wed, 1 May 2013 19:36:16 +0000 (UTC)
From: "Keith Turner (JIRA)" <jira@apache.org>
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Message-ID: <JIRA.12643281.1366305564400.256263.1367436976629@arcas>
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Subject: [jira] [Commented] (ACCUMULO-1321) Dynamic Classloader lost jars
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    [ https://issues.apache.org/jira/browse/ACCUMULO-1321?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13646856#comment-13646856 ] 

Keith Turner commented on ACCUMULO-1321:
----------------------------------------

I figured out why VFS replicates jars to /tmp from HDFS but not from local fs.  The ZipFileSystem code calls replicate on its source filesystem.   When the source filesystem is a LocalFileSystem, replicate does nothing.

I just checked in a fix that will hopefully avoid replication collisions.  
                
> 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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