java.lang.ClassNotFoundException: org.slf4j.LoggerFactory

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java.lang.ClassNotFoundException: org.slf4j.LoggerFactory	at org.glassfish.web.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1509)	at org.glassfish.web.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1359)	at org.apache.tiles.startup.AbstractTilesInitializer.(AbstractTilesInitializer.java:45)	at org.apache.tiles.startup.BasicTilesInitializer.(BasicTilesInitializer.java:37)	at org.springframework.web.servlet.view.tiles2.TilesConfigurer$SpringTilesInitializer.(TilesConfigurer.java:391)	at org.springframework.web.servlet.view.tiles2.TilesConfigurer$SpringTilesInitializer.(TilesConfigurer.java:391)	at org.springframework.web.servlet.view.tiles2.TilesConfigurer.createTilesInitializer(TilesConfigurer.java:372)	at org.springframework.web.servlet.view.tiles2.TilesConfigurer.afterPropertiesSet(TilesConfigurer.java:337)	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1514)	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1452)	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:519)	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)	at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:294)	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:225)	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:291)	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)	at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:585)	at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:913)	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:464)	at org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:631)	at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:588)	at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:645)	at org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:508)	at org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:449)	at org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:133)	at javax.servlet.GenericServlet.init(GenericServlet.java:244)	at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1453)	at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:1250)	at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:5093)	at org.apache.catalina.core.StandardContext.start(StandardContext.java:5380)	at com.sun.enterprise.web.WebModule.start(WebModule.java:498)	at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:917)	at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:901)	at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:733)	at com.sun.enterprise.web.WebContainer.loadWebModule(WebContainer.java:2019)	at com.sun.enterprise.web.WebContainer.loadWebModule(WebContainer.java:1669)	at com.sun.enterprise.web.WebApplication.start(WebApplication.java:109)	at org.glassfish.internal.data.EngineRef.start(EngineRef.java:130)	at org.glassfish.internal.data.ModuleInfo.start(ModuleInfo.java:269)	at org.glassfish.internal.data.ApplicationInfo.start(ApplicationInfo.java:301)	at com.sun.enterprise.v3.server.ApplicationLifecycle.deploy(ApplicationLifecycle.java:461)	at com.sun.enterprise.v3.server.ApplicationLifecycle.deploy(ApplicationLifecycle.java:240)	at org.glassfish.deployment.admin.DeployCommand.execute(DeployCommand.java:389)	at com.sun.enterprise.v3.admin.CommandRunnerImpl$1.execute(CommandRunnerImpl.java:348)	at com.sun.enterprise.v3.admin.CommandRunnerImpl.doCommand(CommandRunnerImpl.java:363)	at com.sun.enterprise.v3.admin.CommandRunnerImpl.doCommand(CommandRunnerImpl.java:1085)	at com.sun.enterprise.v3.admin.CommandRunnerImpl.access$1200(CommandRunnerImpl.java:95)	at com.sun.enterprise.v3.admin.CommandRunnerImpl$ExecutionContext.execute(CommandRunnerImpl.java:1291)	at com.sun.enterprise.v3.admin.CommandRunnerImpl$ExecutionContext.execute(CommandRunnerImpl.java:1259)	at com.sun.enterprise.v3.admin.AdminAdapter.doCommand(AdminAdapter.java:461)	at com.sun.enterprise.v3.admin.AdminAdapter.service(AdminAdapter.java:212)	at com.sun.grizzly.tcp.http11.GrizzlyAdapter.service(GrizzlyAdapter.java:179)	at com.sun.enterprise.v3.server.HK2Dispatcher.dispath(HK2Dispatcher.java:117)	at com.sun.enterprise.v3.services.impl.ContainerMapper$Hk2DispatcherCallable.call(ContainerMapper.java:354)	at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:195)	at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:860)	at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:757)	at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:1056)	at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:229)	at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:137)	at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104)	at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90)	at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:79)	at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:54)	at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:59)	at com.sun.grizzly.ContextTask.run(ContextTask.java:71)	at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:532)	at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:513)	at java.lang.Thread.run(Thread.java:724)