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https://issues.apache.org/jira/browse/HADOOP-9735?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jing Zhao resolved HADOOP-9735.
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Resolution: Not A Problem
> Deprecated configuration property can overwrite non-deprecated property
> -----------------------------------------------------------------------
>
> Key: HADOOP-9735
> URL: https://issues.apache.org/jira/browse/HADOOP-9735
> Project: Hadoop Common
> Issue Type: Bug
> Affects Versions: 3.0.0, 2.1.0-beta
> Reporter: Jing Zhao
> Assignee: Jing Zhao
> Priority: Minor
> Attachments: deprecated-conf.test.patch
>
>
> For the current Configuration implementation, if a conf file contains
> definitions for both a non-deprecated property and its corresponding
> deprecated property (e.g., fs.defaultFS and fs.default.name), the latter will
> overwrite the previous one. In the fs.defaultFS example, this may cause
> client failover not work. It may be better to keep the non-deprecated
> property's value unchanged.
> In the meanwhile, Configuration#getPropertySources may return wrong source
> information for a deprecated property. E.g., after setting fs.defaultFS,
> Configuration#getPropertySources("fs.default.name") will return "because
> fs.defaultFS is deprecated".
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