[show] java.lang.NoClassDefFoundError: org/apache/log4j/spi/ThrowableInformation

java.lang.NoClassDefFoundError: org/apache/log4j/spi/ThrowableInformation
	at org.apache.log4j.spi.LoggingEvent.<init>(LoggingEvent.java:154)
	at org.apache.log4j.Category.forcedLog(Category.java:388)
	at org.apache.log4j.Category.error(Category.java:319)
	at freemarker.log.Log4JLoggerFactory$Log4JLogger.error(Log4JLoggerFactory.java:96)
	at freemarker.core.Environment.handleTemplateException(Environment.java:599)
	at freemarker.core.Environment.visit(Environment.java:199)
	at freemarker.core.MixedContent.accept(MixedContent.java:92)
	at freemarker.core.Environment.visit(Environment.java:196)
	at freemarker.core.Environment.process(Environment.java:176)
	at freemarker.template.Template.process(Template.java:232)
	at freemarker.ext.servlet.FreemarkerServlet.process(FreemarkerServlet.java:444)
	at freemarker.ext.servlet.FreemarkerServlet.doGet(FreemarkerServlet.java:383)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:114)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:91)
	at com.caucho.server.dispatch.ServletFilterChain.doFilter(ServletFilterChain.java:103)
	at shield.front.action.filter.NotAllowedToTunFilesFilter.doFilter(NotAllowedToTunFilesFilter.java:97)
	at com.caucho.server.dispatch.FilterFilterChain.doFilter(FilterFilterChain.java:87)
	at shield.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:39)
	at com.caucho.server.dispatch.FilterFilterChain.doFilter(FilterFilterChain.java:87)
	at shield.sysadm.website.sitemap.GotoSitemapConfirmfileFilter.doFilter(GotoSitemapConfirmfileFilter.java:74)
	at com.caucho.server.dispatch.FilterFilterChain.doFilter(FilterFilterChain.java:87)
	at shield.front.action.filter.InvalidXSSFilter.doFilter(InvalidXSSFilter.java:34)
	at com.caucho.server.dispatch.FilterFilterChain.doFilter(FilterFilterChain.java:87)
	at com.caucho.server.webapp.WebAppFilterChain.doFilter(WebAppFilterChain.java:187)
	at com.caucho.server.dispatch.ServletInvocation.service(ServletInvocation.java:265)
	at com.caucho.server.http.HttpRequest.handleRequest(HttpRequest.java:273)
	at com.caucho.server.port.TcpConnection.run(TcpConnection.java:682)
	at com.caucho.util.ThreadPool$Item.runTasks(ThreadPool.java:743)
	at com.caucho.util.ThreadPool$Item.run(ThreadPool.java:662)
	at java.lang.Thread.run(Thread.java:745)