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https://issues.apache.org/jira/browse/MAPREDUCE-990?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12756363#action_12756363
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Philip Zeyliger commented on MAPREDUCE-990:
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bq. As javadoc says JobContext is a readonly view of the job provided to tasks.
get*TimeStamps cannot be package private methods. Framework would call them
from a different packge.
The framework doesn't currently call them at all. The framework probably has
more than the JobContext, so they ought to move somewhere else. I don't think
they should be part of the user API--can I delete them entirely until they
actually get used?
-- Philip
> Making distributed cache getters in JobContext never return null
> ----------------------------------------------------------------
>
> Key: MAPREDUCE-990
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-990
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Reporter: Philip Zeyliger
> Assignee: Philip Zeyliger
> Priority: Minor
> Attachments: MAPREDUCE-990.patch.txt
>
>
> MAPREDUCE-898 moved distributed cache setters and getters into Job and
> JobContext. Since the API is new, I'd like to propose that those getters
> never return null, but instead always return an array, even if it's empty.
> If people don't like this change, I can instead merely update the javadoc to
> reflect the fact that null may be returned.
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