slfan1989 opened a new pull request, #5755:
URL: https://github.com/apache/hadoop/pull/5755

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   ### Description of PR
   JIRA: YARN-11516. Improve 
existsApplicationHomeSubCluster/existsReservationHomeSubCluster Log Level.
   
   The method FederationStateStoreFacade#existsApplicationHomeSubCluster is 
used to determine whether an application has a HomeSubCluster assigned. If the 
HomeSubCluster is not found, we currently log a warning message. However, 
during the first submission of an application, it is normal for the 
corresponding HomeSubCluster not to exist. This warning message might mislead 
users into thinking that an exception occurred. To address this, we should 
change the logging format of this message to "debug".
   
   FederationStateStoreFacade#existsReservationHomeSubCluster also needs to 
change the log level for the same reason.
   
   ### How was this patch tested?
   
   
   ### For code changes:
   
   - [ ] Does the title or this PR starts with the corresponding JIRA issue id 
(e.g. 'HADOOP-17799. Your PR title ...')?
   - [ ] Object storage: have the integration tests been executed and the 
endpoint declared according to the connector-specific documentation?
   - [ ] If adding new dependencies to the code, are these dependencies 
licensed in a way that is compatible for inclusion under [ASF 
2.0](http://www.apache.org/legal/resolved.html#category-a)?
   - [ ] If applicable, have you updated the `LICENSE`, `LICENSE-binary`, 
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