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https://issues.apache.org/jira/browse/HADOOP-8780?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13452272#comment-13452272
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Ahmed Radwan commented on HADOOP-8780:
--------------------------------------
Many thanks Tom for the review! I have looked at why these two properties were
dropped. This was a result of MAPREDUCE-4493 changes:
In ConfigUtil.java:
{code}
- Configuration.addDeprecation("mapred.create.symlink",
- new String[] {MRJobConfig.CACHE_SYMLINK});
{code}
And then the doc was added to DeprecatedProperties.apt.vm:
{code}
-|mapred.create.symlink | mapreduce.job.cache.symlink.create
+|mapred.create.symlink | NONE - symlinking is always on
+*---+---+
+|mapreduce.job.cache.symlink.create | NONE - symlinking is always on
{code}
This is why these two properties were automatically dropped. I think dropping
them is fine though. This document lists the deprecated properties and their
replacements but these two properties are not deprecated, they are always on.
So this apt document may not be the place to convey that. What do you think? I
am also CCing Bobby to see if he has a different opinion. Any thoughts?
> Update DeprecatedProperties apt file
> ------------------------------------
>
> Key: HADOOP-8780
> URL: https://issues.apache.org/jira/browse/HADOOP-8780
> Project: Hadoop Common
> Issue Type: Bug
> Reporter: Ahmed Radwan
> Assignee: Ahmed Radwan
> Attachments: HADOOP-8780.patch
>
>
> The current list of deprecated properties is not up-to-date. I'll will upload
> a patch momentarily.
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