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From "Prasanth Jayachandran (JIRA)" <>
Subject [jira] [Commented] (HIVE-11572) Datanucleus loads Log4j1.x Logger from AppClassLoader
Date Wed, 19 Aug 2015 18:33:45 GMT


Prasanth Jayachandran commented on HIVE-11572:

[~gopalv] But hive libs are appended to CLASSPATH, not to HIVE_CLASSPATH.
for f in ${HIVE_LIB}/*.jar; do

That's the reason why I prepended the CLASSPATH before HADOOP_CLASSPATH.

> Datanucleus loads Log4j1.x Logger from AppClassLoader
> -----------------------------------------------------
>                 Key: HIVE-11572
>                 URL:
>             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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