Can commons-logging.properties be pulled from hadoop-core?
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Key: HADOOP-3368
URL: https://issues.apache.org/jira/browse/HADOOP-3368
Project: Hadoop Core
Issue Type: Improvement
Affects Versions: 0.16.3
Reporter: Steve Loughran
In the root of hadoop-core.jar is a log4j.properties and a
commons-logging.properties
while this provides good standalone functionality to hadoop, it complicates
anyone else trying to control the logging, and use the libraries in-process.
In particular, there is a commons-logging.properties file that selects Log4J as
the back end. This is not needed as
-log4j is automatically picked up if it is on the classpath
-if it is not on the classpath, asking for it is generally considered bad form
If you look at the commons-logging configuration details:
http://commons.apache.org/logging/guide.html#Configuration
you will see that that such a properties file takes priority over any setting
through system properties, which makes it very hard to override the settings
without adding multiple commons-logging.properties files and playing with their
priority settings
If you pull the commons-logging.properties file from hadoop-core log4j will
still be picked up by default, but it becomes easier for people to turn on
different logging infrastructures if they want to. It should have no visible
impact on the end user experience (unlike pulling log4j.properties)
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