[jira] [Commented] (YARN-11348) Deprecated property can not be unset

["fanshilun (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/YARN-11348?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17617397#comment-17617397 ] 

fanshilun commented on YARN-11348:
----------------------------------

Thank you for your feedback. From my personal point of view, if we don't want to use deprecated properties, we should delete them from yarn-site.xml. However, in order to ensure compatibility, the community should only mark it as deprecated, and there is no mandatory configuration from the base removed.

> Deprecated property can not be unset
> ------------------------------------
>
>                 Key: YARN-11348
>                 URL: https://issues.apache.org/jira/browse/YARN-11348
>             Project: Hadoop YARN
>          Issue Type: Bug
>            Reporter: Bence Kosztolnik
>            Priority: Major
>              Labels: newbie
>
> If you try to unset a deprecated property in an *CapacitySchedulerConfiguration* object the value wont be removed.
> Example failing Test for the *TestCapacitySchedulerConfiguration* class
> {noformat}
> @Test
> public void testDeprecationFeatureWorks() {
>   final String value = "VALUE";
>   final String goodName = "koko";
>   final String depName = "dfs.nfs.exports.allowed.hosts";
>   final CapacitySchedulerConfiguration csConf = createDefaultCsConf();
>   csConf.set(goodName, value);
>   csConf.unset(goodName);
>   assertNull(csConf.get(goodName));
>   csConf.set(depName, value);
>   csConf.unset(depName);
>   assertNull(csConf.get(depName));  // fails here
> }{noformat}



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