[GitHub] [hive] coder-chenzhi opened a new pull request #556: HIVE-21392 Fix misconfigurations of DataNucleus log in log4j.properties

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coder-chenzhi opened a new pull request #556: HIVE-21392 Fix misconfigurations of DataNucleus log in log4j.properties
URL: https://github.com/apache/hive/pull/556
 
 
   HIVE-21392 Misconfigurations of DataNucleus log in log4j.properties
   
   In the patch of [HIVE-12020](https://issues.apache.org/jira/browse/HIVE-12020), we changed the DataNucleus related logging configuration from nine fine-grained loggers with three coarse-grained loggers (DataNucleus, Datastore and JPOX). 
   
   As Prasanth Jayachandran [explain](https://issues.apache.org/jira/browse/HIVE-12020?focusedCommentId=15025612&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-15025612), these three loggers are the top-level logger in DataNucleus, so that we don't need to specify other loggers for DataNucleus. 
   
   However, according to the [documents](http://www.datanucleus.org/products/accessplatform/logging.html) and [source codes](https://github.com/datanucleus/datanucleus-core/blob/master/src/main/java/org/datanucleus/util/NucleusLogger.java#L108) of DataNucleus, the top-level logger in DataNucleus is `DataNucleus`. Therefore, we just need to keep the right one.

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