Spring project : A "org.apache.log4j.xml.DOMConfigurator" object is not assignable to a "org.apache.log4j.spi.Configurator" variable

I have a project named taolijie, but when I deploy it to WildFly:

:04,843 ERROR [stderr] (MSC service thread 1-2) log4j:ERROR A "org.apache.log4j.xml.DOMConfigurator" object is not assignable to a "org.apache.log4j.spi.Configurator" variable.
09:29:04,843 ERROR [stderr] (MSC service thread 1-2) log4j:ERROR The class "org.apache.log4j.spi.Configurator" was loaded by 
09:29:04,844 ERROR [stderr] (MSC service thread 1-2) log4j:ERROR [ModuleClassLoader for Module "deployment.taolijie.war:main" from Service Module Loader] whereas object of type 
09:29:04,844 ERROR [stderr] (MSC service thread 1-2) log4j:ERROR "org.apache.log4j.xml.DOMConfigurator" was loaded by [ModuleClassLoader for Module "org.jboss.log4j.logmanager:main" from local module loader @12bc6874 (finder: local module finder @de0a01f (roots: /home/whf/app/wildfly-8.0.0.Final/modules,/home/whf/app/wildfly-8.0.0.Final/modules/system/layers/base))].
09:29:04,844 ERROR [stderr] (MSC service thread 1-2) log4j:ERROR Could not instantiate configurator [org.apache.log4j.xml.DOMConfigurator].
09:29:04,850 ERROR [stderr] (MSC service thread 1-2) log4j:WARN No appenders could be found for logger (org.jboss.logging).
09:29:04,850 ERROR [stderr] (MSC service thread 1-2) log4j:WARN Please initialize the log4j system properly.
09:29:04,850 ERROR [stderr] (MSC service thread 1-2) log4j:WARN See http://ift.tt/1foX5be for more info.

This error didn't exist last week. How to fix this?