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https://issues.apache.org/jira/browse/YARN-7243?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16190866#comment-16190866
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Akira Ajisaka commented on YARN-7243:
-------------------------------------

Thanks [~Cyl] for the work! The usages of LogManager in tests can be replaced 
as follows:
{code}
+    GenericTestUtils.setRootLogLevel(Level.DEBUG);
-    org.apache.log4j.Logger rootLogger = LogManager.getRootLogger();
-    rootLogger.setLevel(Level.DEBUG);
{code}
In FairSchedulerEventLog.java, I'm okay with leave it unchanged because this 
class is strongly depends on Log4J1 implementation. We need to remove or update 
this when updating from Log4J1 to Log4J2.

> Moving logging APIs over to slf4j in hadoop-yarn-server-resourcemanager
> -----------------------------------------------------------------------
>
>                 Key: YARN-7243
>                 URL: https://issues.apache.org/jira/browse/YARN-7243
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>            Reporter: Yeliang Cang
>            Assignee: Yeliang Cang
>         Attachments: YARN-7243.001.patch, YARN-7243.002.patch, 
> YARN-7243.003.patch
>
>




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