liferay的控制条docbar消失解决方法

页面报错

liferay某实例A因为未知错误，其控制面板无法显示docbar的内容（图1红圈中所示），liferay控制面板的正常显示应如图2所示：

图1

图2

liferay后台日志报错如

三月 29, 2017 9:17:32 上午 org.apache.catalina.core.ApplicationDispatcher invoke
严重: Servlet.service() for servlet jsp threw exception
java.lang.ClassNotFoundException: org.apache.jsp.html.portlet.dockbar.view_jspat java.net.URLClassLoader$1.run(URLClassLoader.java:366)at java.net.URLClassLoader$1.run(URLClassLoader.java:355)at java.security.AccessController.doPrivileged(Native Method)at java.net.URLClassLoader.findClass(URLClassLoader.java:354)at org.apache.jasper.servlet.JasperLoader.loadClass(JasperLoader.java:132)at org.apache.jasper.servlet.JasperLoader.loadClass(JasperLoader.java:63)at org.apache.catalina.core.DefaultInstanceManager.newInstance(DefaultInstanceManager.java:121)at org.apache.jasper.servlet.JspServletWrapper.getServlet(JspServletWrapper.java:172)at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:376)at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:395)at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:339)at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:116)at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilter.doFilter(InvokerFilter.java:119)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:748)at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:604)at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:543)at com.liferay.portal.servlet.DirectServletPathRegisterDispatcher.include(DirectServletPathRegisterDispatcher.java:55)
at com.liferay.portal.servlet.ClassLoaderRequestDispatcherWrapper.doDispatch(ClassLoaderRequestDispatcherWrapper.java:78)
at com.liferay.portal.servlet.ClassLoaderRequestDispatcherWrapper.include(ClassLoaderRequestDispatcherWrapper.java:53)at com.liferay.taglib.util.IncludeTag.include(IncludeTag.java:295)at com.liferay.taglib.util.IncludeTag.doInclude(IncludeTag.java:192)at com.liferay.taglib.util.IncludeTag.doEndTag(IncludeTag.java:83)at org.apache.jsp.html.portal.render_005fportlet_jsp._jspService(render_005fportlet_jsp.java:1489)at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)at com.liferay.portal.servlet.DirectRequestDispatcher.include(DirectRequestDispatcher.java:57)
at com.liferay.portal.servlet.ClassLoaderRequestDispatcherWrapper.doDispatch(ClassLoaderRequestDispatcherWrapper.java:78)
at com.liferay.portal.servlet.ClassLoaderRequestDispatcherWrapper.include(ClassLoaderRequestDispatcherWrapper.java:53)at com.liferay.portlet.PortletContainerImpl._doRender(PortletContainerImpl.java:638)at com.liferay.portlet.PortletContainerImpl.render(PortletContainerImpl.java:135)at com.liferay.portlet.SecurityPortletContainerWrapper.render(SecurityPortletContainerWrapper.java:141)at com.liferay.portlet.RestrictPortletContainerWrapper.render(RestrictPortletContainerWrapper.java:126)at com.liferay.portal.kernel.portlet.PortletContainerUtil.render(PortletContainerUtil.java:156)at com.liferay.taglib.portletext.RuntimeTag.doTag(RuntimeTag.java:153)at com.liferay.taglib.portletext.RuntimeTag.doTag(RuntimeTag.java:68)at com.liferay.taglib.util.VelocityTaglibImpl.runtime(VelocityTaglibImpl.java:1066)at com.liferay.taglib.util.VelocityTaglibImpl.runtime(VelocityTaglibImpl.java:1059)at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)at java.lang.reflect.Method.invoke(Method.java:606)at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.doInvoke(UberspectImpl.java:389)at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.invoke(UberspectImpl.java:378)at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:270)at org.apache.velocity.runtime.parser.node.ASTReference.execute(ASTReference.java:262)at org.apache.velocity.runtime.parser.node.ASTReference.render(ASTReference.java:342)at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72)at org.apache.velocity.runtime.directive.VelocimacroProxy.render(VelocimacroProxy.java:212)at org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java:247)at org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:175)at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72)at org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:87)at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72)at org.apache.velocity.runtime.directive.Foreach.render(Foreach.java:366)at org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:175)at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72)at org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:87)at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:336)at org.apache.velocity.Template.merge(Template.java:328)at org.apache.velocity.Template.merge(Template.java:235)at com.liferay.portal.velocity.VelocityTemplate.processTemplate(VelocityTemplate.java:112)at com.liferay.portal.template.AbstractTemplate.processTemplate(AbstractTemplate.java:108)at com.liferay.taglib.util.ThemeUtil.doIncludeVM(ThemeUtil.java:511)at com.liferay.taglib.util.ThemeUtil.doDispatch(ThemeUtil.java:177)at com.liferay.taglib.util.ThemeUtil.includeVM(ThemeUtil.java:133)at com.liferay.taglib.util.ThemeUtil.include(ThemeUtil.java:99)at com.liferay.taglib.theme.IncludeTag.doEndTag(IncludeTag.java:34)at org.apache.jsp.html.common.themes.portal_jsp._jspx_meth_liferay_002dtheme_005finclude_005f1(portal_jsp.java:581)at org.apache.jsp.html.common.themes.portal_jsp._jspService(portal_jsp.java:518)at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:439)at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:395)at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:339)at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:116)at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:169)
at com.liferay.portal.servlet.filters.uploadservletrequest.UploadServletRequestFilter.processFilter(UploadServletRequestFilter.java:93)at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:59)at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:204)at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:109)at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:169)at com.liferay.portal.servlet.filters.jsoncontenttype.JSONContentTypeFilter.processFilter(JSONContentTypeFilter.java:42)at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:59)at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:204)at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:109)at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilter.doFilter(InvokerFilter.java:119)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:748)at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:486)at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:411)at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:338)at com.liferay.portal.struts.StrutsUtil.forward(StrutsUtil.java:78)at com.liferay.portal.struts.PortalRequestProcessor.doForward(PortalRequestProcessor.java:274)at org.apache.struts.tiles.TilesRequestProcessor.processTilesDefinition(TilesRequestProcessor.java:239)at org.apache.struts.tiles.TilesRequestProcessor.processForwardConfig(TilesRequestProcessor.java:302)at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:241)at com.liferay.portal.struts.PortalRequestProcessor.process(PortalRequestProcessor.java:168)at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414)at javax.servlet.http.HttpServlet.service(HttpServlet.java:624)at com.liferay.portal.servlet.MainServlet.callParentService(MainServlet.java:557)at com.liferay.portal.servlet.MainServlet.service(MainServlet.java:534)at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:116)at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:169)
at com.liferay.portal.servlet.filters.uploadservletrequest.UploadServletRequestFilter.processFilter(UploadServletRequestFilter.java:93)at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:59)at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:204)at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:109)at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:169)at com.liferay.portal.servlet.filters.secure.SecureFilter.processFilter(SecureFilter.java:308)at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:59)at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:204)at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:109)at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:169)at com.liferay.portal.servlet.filters.jsoncontenttype.JSONContentTypeFilter.processFilter(JSONContentTypeFilter.java:42)at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:59)at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:204)at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:109)at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilter.doFilter(InvokerFilter.java:119)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:748)at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:486)at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:411)at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:338)at com.liferay.portal.servlet.FriendlyURLServlet.service(FriendlyURLServlet.java:161)at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:116)at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:169)
at com.liferay.portal.servlet.filters.uploadservletrequest.UploadServletRequestFilter.processFilter(UploadServletRequestFilter.java:93)at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:59)at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:204)at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:109)at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:169)at com.liferay.portal.servlet.filters.strip.StripFilter.processFilter(StripFilter.java:361)at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:59)at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:204)at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:109)at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:169)at com.liferay.portal.servlet.filters.gzip.GZipFilter.processFilter(GZipFilter.java:123)at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:59)at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:204)at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:109)at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:169)at com.liferay.portal.servlet.filters.secure.SecureFilter.processFilter(SecureFilter.java:308)at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:59)at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:204)at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:109)at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:169)at com.liferay.portal.servlet.filters.i18n.I18nFilter.processFilter(I18nFilter.java:254)at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:59)at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:204)at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:109)at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:169)at com.liferay.portal.servlet.filters.etag.ETagFilter.processFilter(ETagFilter.java:86)at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:59)at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:204)at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:109)at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:169)at com.liferay.portal.servlet.filters.jsoncontenttype.JSONContentTypeFilter.processFilter(JSONContentTypeFilter.java:42)at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:59)at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:204)at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:109)at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:169)at com.liferay.portal.servlet.filters.autologin.AutoLoginFilter.processFilter(AutoLoginFilter.java:268)at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:59)at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:204)at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:109)at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilter.doFilter(InvokerFilter.java:119)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:748)at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:486)at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:411)at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:338)at com.liferay.portal.servlet.filters.virtualhost.VirtualHostFilter.processFilter(VirtualHostFilter.java:320)at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:59)at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:204)at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:109)at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDirectCallFilter(InvokerFilterChain.java:185)at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:96)at org.tuckey.web.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:738)at com.liferay.portal.servlet.filters.urlrewrite.UrlRewriteFilter.processFilter(UrlRewriteFilter.java:57)at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:59)at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:204)at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:109)at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDirectCallFilter(InvokerFilterChain.java:165)at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:96)at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDirectCallFilter(InvokerFilterChain.java:165)at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:96)at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDirectCallFilter(InvokerFilterChain.java:185)at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:96)at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilter.doFilter(InvokerFilter.java:119)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:614)at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:957)at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:423)at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1079)at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:620)at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:318)at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)at java.lang.Thread.run(Thread.java:745)09:17:32,306 ERROR [http-bio-9097-exec-4][IncludeTag:129] Current URL /jxdoe/userinfo generates exception: java.lang.ClassNotFoundException: org.apache.jsp.html.portlet.dockbar.view_jsp
java.lang.ClassNotFoundException: org.apache.jsp.html.portlet.dockbar.view_jspat java.net.URLClassLoader$1.run(URLClassLoader.java:366)at java.net.URLClassLoader$1.run(URLClassLoader.java:355)at java.net.URLClassLoader.findClass(URLClassLoader.java:354)at org.apache.jasper.servlet.JasperLoader.loadClass(JasperLoader.java:132)at org.apache.jasper.servlet.JasperLoader.loadClass(JasperLoader.java:63)at org.apache.catalina.core.DefaultInstanceManager.newInstance(DefaultInstanceManager.java:121)at org.apache.jasper.servlet.JspServletWrapper.getServlet(JspServletWrapper.java:172)at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:376)at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:395)at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:339)at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:116)at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilter.doFilter(InvokerFilter.java:119)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:748)at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:604)at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:543)

解决方法

找一份没有出现docbar显示错误的liferay安装包，按照如下路径：liferayPath \liferay-portal-6.2-ce-ga5\tomcat-7.0.62\webapps\ROOT，找到名为html的文件夹，如下图3所示：

图3

复制该html文件夹，用它覆盖出问题的liferay示例，这里以开发环境50的jxdoe为例，路径为……/liferay-portal-6.2-ce-ga5/tomcat-7.0.62/webapps/ROOT，用图3中复制的html文件覆盖上面路径中的html文件。覆盖完成后重启服务器，你会发现，控制条docbar又回来了。

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liferay的控制条docbar消失解决方法

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