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Date: Sat, 15 Aug 2015 04:36:45 +0000 (UTC)
From: "Prasanth Jayachandran (JIRA)" <jira@apache.org>
To: issues@hive.apache.org
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Subject: [jira] [Commented] (HIVE-11572) Datanucleus loads Log4j1.x Logger
 from its ClassLoader
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    [ https://issues.apache.org/jira/browse/HIVE-11572?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14698105#comment-14698105 ] 

Prasanth Jayachandran commented on HIVE-11572:
----------------------------------------------

[~thejas]/[~gopalv] Can someone take a look at this small patch?

> Datanucleus loads Log4j1.x Logger from its ClassLoader
> ------------------------------------------------------
>
>                 Key: HIVE-11572
>                 URL: https://issues.apache.org/jira/browse/HIVE-11572
>             Project: Hive
>          Issue Type: Sub-task
>          Components: Logging
>    Affects Versions: 2.0.0
>            Reporter: Prasanth Jayachandran
>            Assignee: Prasanth Jayachandran
>             Fix For: 2.0.0
>
>         Attachments: HIVE-11572.patch
>
>
> As part of HIVE-11304, we moved from Log4j1.x to Log4j2. But DataNucleus log messages gets logged to console when launching the hive cli. The reason is DataNucleus is trying to load Log4j1.x Logger by traversing its class loader. Although we use log4j-1.2-api bridge we are loading log4j-1.2.16 jar that was pulled by ZooKeeper. We should make sure that there is no log4j-1.2.16 in datanucleus classloader hierarchy (classpath). 
> DataNucleus logger has this 
> {code}
> NucleusLogger.class.getClassLoader().loadClass("org.apache.log4j.Logger");
>             loggerClass = org.datanucleus.util.Log4JLogger.class;
> {code}


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