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Posted to common-dev@hadoop.apache.org by "Jim Brennan (JIRA)" <ji...@apache.org> on 2018/04/02 18:07:00 UTC

[jira] [Created] (HADOOP-15357) Configuration.getPropsWithPrefix no longer does variable substitution

Jim Brennan created HADOOP-15357:
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             Summary: 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


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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