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https://issues.apache.org/jira/browse/TEZ-3338?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15379934#comment-15379934
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Siddharth Seth commented on TEZ-3338:
-------------------------------------
Haven't looked at this in detail, and am not really aware of the complexity in
achieving both; however - if a choice had to be made, I'd vote for the second
option - isolate user code from (hadoop+tez).
That said - Tez itself has run into problems like not being able to upgrade to
log4j2, the usual guava, etc - being forced to use the same version of
libraries shipped with hadoop - and some of these can only change in Hadoop
during a major version upgrade.
> Support classloader isolation
> -----------------------------
>
> Key: TEZ-3338
> URL: https://issues.apache.org/jira/browse/TEZ-3338
> Project: Apache Tez
> Issue Type: Improvement
> Reporter: Ming Ma
>
> HADOOP-10893 and MAPREDUCE-1700 provide classloader isolation at both client
> side and container side for MR. We should add the same support for Tez. Given
> we use hadoop command to launch Tez, it appears the client side has been
> taken care of. Only the container side support is needed.
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