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From "Dave Marion (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ACCUMULO-927) Replace HDFS VFS FileSystem objects with the ones from Commons VFS
Date Fri, 04 Jan 2013 03:04:13 GMT

    [ https://issues.apache.org/jira/browse/ACCUMULO-927?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13543564#comment-13543564
] 

Dave Marion commented on ACCUMULO-927:
--------------------------------------

But your v1.0 class would still be loaded in the VM. I don't think there is a guarantee as
to when classes get unloaded from the VM assuming that you have enabled those options. Your
scenario would only work if the class was in a different package.

 You could however deploy the jar to a new location and set the table context to the new location.

Sent from my Motorola ATRIX™ 4G on AT&T

-----Original message-----
From: "Josh Elser (JIRA)" <jira@apache.org>
To: notifications@accumulo.apache.org
Sent: Fri, Jan 4, 2013 02:54:12 GMT+00:00
Subject: [jira] [Commented] (ACCUMULO-927) Replace HDFS VFS FileSystem objects with the ones
from Commons VFS


    [ https://issues.apache.org/jira/browse/ACCUMULO-927?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13543557#comment-13543557
] 

Josh Elser commented on ACCUMULO-927:
-------------------------------------

What about a case in which I have my-code-1.0.jar deployed. I then find a problem in my code,
cut a new version and deploy my-code-1.1.jar. Say in version 1.1, I have a class in which
I added a new method that did not exist in 1.0. Wouldn't I have undefined behavior (my class
in 1.0 or 1.1 could be used by Accumulo) if the 1.0 classes aren't removed completely?

bq. I don't think it will be common that folks delete jars from HDFS without restarting Accumulo
as the classes that are loaded from that jar will still be resident in the VM.
                


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> Replace HDFS VFS FileSystem objects with the ones from Commons VFS
> ------------------------------------------------------------------
>
>                 Key: ACCUMULO-927
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-927
>             Project: Accumulo
>          Issue Type: Sub-task
>          Components: start
>            Reporter: Dave Marion
>            Assignee: Dave Marion
>             Fix For: 1.5.0
>
>         Attachments: ACCUMULO-927-1.patch
>
>


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