Jenkins build failure due to log4j:WARN

Hi,
Jenkins run the success build, but due to log4j warning the build
mark failure. Would someone help?

BUILD SUCCESSFUL
Total time: 10 seconds
[workspace] $
/var/lib/jenkins/tools/hudson.tasks.Maven_MavenInstallation/maven/bin/mvn -f
/ClaimServiceEAR/pom.xml -s /ClaimServiceEAR/settings.xml deploy
log4j:WARN No appenders could be found for logger
(org.apache.maven.cli.logging.BaseSlf4jConfiguration).
log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for
more info.
Build step 'Invoke top-level Maven targets' marked build as failure
Archiving artifacts
Skipping Cobertura coverage report as build was not UNSTABLE or better ...
Recording test results
Sending e-mails to:
No emails were triggered.
Finished: FAILURE