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https://issues.apache.org/jira/browse/ACCUMULO-708?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13496802#comment-13496802
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Josh Elser commented on ACCUMULO-708:
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bq. Moving forward on this we need to start thinking about having a table prop
for configuring per table classloaders.
I was thinking more along the lines that a (Batch)Scanner could actually be
tied to a ClassLoader. I could potentially have one table in which some
standard query iterators are used for scanning, but I also want to allow other
developers to load/use their own code to scan that same table without messing
up my production query code. That most certainly complicates things, but
perhaps there is an elegant way around not that without mucking with the
existing API too much.
You still need some default ClassLoader like you pointed out, Keith, which
provides the accumulo-core and hadoop-core dependencies. Looking back at the
older comments, perhaps tying ClassLoaders to authenticated users would be
easiest? I'd have to defer to Keith's larger understanding of the code as well.
Dave, I still owe you a look at the code/integration more in-depth; I didn't
get far past the test cases running successfully.
> Modify ClassLoader to support different applications / multi-tenancy
> --------------------------------------------------------------------
>
> Key: ACCUMULO-708
> URL: https://issues.apache.org/jira/browse/ACCUMULO-708
> Project: Accumulo
> Issue Type: Improvement
> Components: start
> Reporter: Dave Marion
> Assignee: Dave Marion
> Labels: classloader
> Fix For: 1.5.0
>
> Attachments: ACCUMULO-708-1.patch
>
> Original Estimate: 24h
> Time Spent: 33h
> Remaining Estimate: 0h
>
> I'd like to expand the current classloader to support loading classes from
> HDFS and different application contexts. I'll be modifying the ticket as the
> idea matures.
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