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https://issues.apache.org/jira/browse/TEZ-4094?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17163946#comment-17163946
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Jonathan Turner Eagles commented on TEZ-4094:
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That piece of code is added to prevent allocation of all attempts and was added
as a scalability feature. The code is messy. Perhaps a better comment and some
code tidying would improve readability while keeping the runtime optimized for
scale.
> Change Task Interface to use List instead of Concrete ArrayList
> ---------------------------------------------------------------
>
> Key: TEZ-4094
> URL: https://issues.apache.org/jira/browse/TEZ-4094
> Project: Apache Tez
> Issue Type: Improvement
> Reporter: David Mollitor
> Priority: Minor
> Attachments: TEZ-4094.1.patch, TEZ-4094.2.patch
>
>
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