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org.apache.commons.logging.LogConfigurationException: Class org.apache.commons.logging.impl.Log4JLogger does not implement Log	at org.apache.commons.logging.impl.LogFactoryImpl.getLogConstructor(LogFactoryImpl.java:412)	at org.apache.commons.logging.impl.LogFactoryImpl.newInstance(LogFactoryImpl.java:525)	at org.apache.commons.logging.impl.LogFactoryImpl.getInstance(LogFactoryImpl.java:272)	at org.apache.commons.logging.impl.LogFactoryImpl.getInstance(LogFactoryImpl.java:246)	at org.apache.commons.logging.LogFactory.getLog(LogFactory.java:395)	at javax.faces.component.UIComponentBase.(UIComponentBase.java:45)	at com.sun.faces.application.ViewHandlerImpl.createView(ViewHandlerImpl.java:254)	at com.sun.faces.lifecycle.RestoreViewPhase.execute(RestoreViewPhase.java:164)	at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:200)	at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:90)	at javax.faces.webapp.FacesServlet.service(FacesServlet.java:94)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:200)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:146)	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:209)	at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:596)	at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:433)	at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:948)	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:144)	at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:596)	at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:433)	at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:948)	at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2350)	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:133)	at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:596)	at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:118)	at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:594)	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:116)	at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:594)	at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:534)	at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:594)	at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:433)	at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:948)	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:127)	at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:596)	at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:433)	at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:948)	at org.apache.catalina.connector.http.HttpProcessor.process(HttpProcessor.java:994)	at org.apache.catalina.connector.http.HttpProcessor.run(HttpProcessor.java:1105)	at java.lang.Thread.run(Thread.java:662)