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https://issues.apache.org/jira/browse/HADOOP-15357?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16425973#comment-16425973
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Larry McCay commented on HADOOP-15357:
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Hi [~Jim_Brennan] - the patch looks good.
I notice that you decided to not use the get() method itself was this due to
thinking that we don't need the handleDeprecation stuff?
If so, why do you think we don't need it?
I'm not saying that we do but would like to understand why you think we don't.
> Configuration.getPropsWithPrefix no longer does variable substitution
> ---------------------------------------------------------------------
>
> Key: HADOOP-15357
> URL: https://issues.apache.org/jira/browse/HADOOP-15357
> Project: Hadoop Common
> Issue Type: Bug
> Reporter: Jim Brennan
> Assignee: Jim Brennan
> Priority: Major
> Attachments: HADOOP-15357.001.patch, HADOOP-15357.002.patch
>
>
> Before [HADOOP-13556], Configuration.getPropsWithPrefix() used the
> Configuration.get() method to get the value of the variables. After
> [HADOOP-13556], it now uses props.getProperty().
> The difference is that Configuration.get() does deprecation handling and more
> importantly variable substitution on the value. So if a property has a
> variable specified with ${variable_name}, it will no longer be expanded when
> retrieved via getPropsWithPrefix().
> Was this change in behavior intentional? I am using this function in the fix
> for [MAPREDUCE-7069], but we do want variable expansion to happen.
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