Jason Lowe updated HADOOP-15357:
    Affects Version/s: 2.9.0
     Target Version/s: 3.2.0, 3.1.1, 2.9.2, 3.0.3

+1 the latest patch looks good to me as well.  I'll commit this later today if 
there are no objections.

> 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
>    Affects Versions: 2.9.0, 3.0.0
>            Reporter: Jim Brennan
>            Assignee: Jim Brennan
>            Priority: Major
>         Attachments: HADOOP-15357.001.patch, HADOOP-15357.002.patch, 
> HADOOP-15357.003.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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