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    Thrown to indicate that a method has been passed an illegal or inappropriate argument. Check that you don't have more than one method existing with the same name.

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java.lang.IllegalArgumentException: object is not an instance of declaring class	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)	at java.lang.reflect.Method.invoke(Method.java:585)	at org.apache.log4j.config.PropertySetter.setProperty(PropertySetter.java:205)	at org.apache.log4j.config.PropertySetter.setProperty(PropertySetter.java:164)	at org.apache.log4j.config.PropertySetter.setProperties(PropertySetter.java:129)	at org.apache.log4j.config.PropertySetter.setProperties(PropertySetter.java:96)	at org.apache.log4j.PropertyConfigurator.parseAppender(PropertyConfigurator.java:654)	at org.apache.log4j.PropertyConfigurator.parseCategory(PropertyConfigurator.java:612)	at org.apache.log4j.PropertyConfigurator.parseCatsAndRenderers(PropertyConfigurator.java:533)	at org.apache.log4j.PropertyConfigurator.doConfigure(PropertyConfigurator.java:417)	at org.apache.log4j.PropertyConfigurator.doConfigure(PropertyConfigurator.java:316)	at org.apache.log4j.PropertyWatchdog.doOnChange(PropertyConfigurator.java:682)	at org.apache.log4j.helpers.FileWatchdog.checkAndConfigure(FileWatchdog.java:88)	at org.apache.log4j.helpers.FileWatchdog.(FileWatchdog.java:57)	at org.apache.log4j.PropertyWatchdog.(PropertyConfigurator.java:674)	at org.apache.log4j.PropertyConfigurator.configureAndWatch(PropertyConfigurator.java:382)	at com.liferay.portal.events.InitAction.run(InitAction.java:147)	at com.liferay.portal.events.EventsProcessor._process(EventsProcessor.java:144)	at com.liferay.portal.events.EventsProcessor.process(EventsProcessor.java:73)	at com.liferay.portal.util.InitUtil.init(InitUtil.java:38)	at com.liferay.portal.util.PropsUtil.(PropsUtil.java:23)	at com.liferay.portal.servlet.filters.layoutcache.LayoutCacheFilter.(LayoutCacheFilter.java:448)	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)	at java.lang.reflect.Constructor.newInstance(Constructor.java:494)	at java.lang.Class.newInstance0(Class.java:350)	at java.lang.Class.newInstance(Class.java:303)	at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:210)	at org.apache.catalina.core.ApplicationFilterConfig.setFilterDef(ApplicationFilterConfig.java:304)	at org.apache.catalina.core.ApplicationFilterConfig.(ApplicationFilterConfig.java:77)	at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:3600)	at org.apache.catalina.core.StandardContext.start(StandardContext.java:4193)	at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1013)	at org.apache.catalina.core.StandardHost.start(StandardHost.java:718)	at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1013)	at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:442)	at org.apache.catalina.core.StandardService.start(StandardService.java:450)	at org.apache.catalina.core.StandardServer.start(StandardServer.java:709)	at org.apache.catalina.startup.Catalina.start(Catalina.java:551)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)	at java.lang.reflect.Method.invoke(Method.java:585)	at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:294)	at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:432)