2015-02-23 16:31:33,829 [http://localhost:8090/xwiki/bin/commentadd/Main/WebHome?viewer=comments] ERROR c.x.x.XWiki                    - Error while evaluating velocity template [] 
java.lang.NullPointerException: null
	at com.xpn.xwiki.internal.template.TemplateManager.renderFromSkin(TemplateManager.java:543) [xwiki-platform-legacy-oldcore-6.4.jar:na]
	at com.xpn.xwiki.internal.template.TemplateManager.renderFromSkin(TemplateManager.java:526) [xwiki-platform-legacy-oldcore-6.4.jar:na]
	at com.xpn.xwiki.internal.template.TemplateManager.render(TemplateManager.java:512) [xwiki-platform-legacy-oldcore-6.4.jar:na]
	at com.xpn.xwiki.XWiki.evaluateTemplate(XWiki.java:1712) [xwiki-platform-legacy-oldcore-6.4.jar:na]
	at com.xpn.xwiki.XWiki.parseTemplate(XWiki.java:1692) [xwiki-platform-legacy-oldcore-6.4.jar:na]
	at com.xpn.xwiki.api.XWiki.parseTemplate(XWiki.java:801) [xwiki-platform-legacy-oldcore-6.4.jar:na]
	at sun.reflect.GeneratedMethodAccessor226.invoke(Unknown Source) ~[na:na]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.7.0_67]
	at java.lang.reflect.Method.invoke(Method.java:606) ~[na:1.7.0_67]
	at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.doInvoke(UberspectImpl.java:395) [velocity-1.7.jar:1.7]
	at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.invoke(UberspectImpl.java:384) [velocity-1.7.jar:1.7]
	at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:173) [velocity-1.7.jar:1.7]
	at org.apache.velocity.runtime.parser.node.ASTReference.execute(ASTReference.java:280) [velocity-1.7.jar:1.7]
	at org.apache.velocity.runtime.parser.node.ASTReference.render(ASTReference.java:369) [velocity-1.7.jar:1.7]
	at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72) [velocity-1.7.jar:1.7]
	at org.apache.velocity.runtime.directive.VelocimacroProxy.render(VelocimacroProxy.java:216) [velocity-1.7.jar:1.7]
	at org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java:311) [velocity-1.7.jar:1.7]
	at org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java:230) [velocity-1.7.jar:1.7]
	at org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:207) [velocity-1.7.jar:1.7]
	at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:342) [velocity-1.7.jar:1.7]
	at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluateInternal(DefaultVelocityEngine.java:256) [xwiki-commons-velocity-6.4.jar:na]
	at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluate(DefaultVelocityEngine.java:222) [xwiki-commons-velocity-6.4.jar:na]
	at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluate(DefaultVelocityEngine.java:198) [xwiki-commons-velocity-6.4.jar:na]
	at com.xpn.xwiki.internal.template.TemplateManager.evaluateContent(TemplateManager.java:674) [xwiki-platform-legacy-oldcore-6.4.jar:na]
	at com.xpn.xwiki.internal.template.TemplateManager.render(TemplateManager.java:574) [xwiki-platform-legacy-oldcore-6.4.jar:na]
	at com.xpn.xwiki.internal.template.TemplateManager.renderFromSkin(TemplateManager.java:555) [xwiki-platform-legacy-oldcore-6.4.jar:na]
	at com.xpn.xwiki.internal.template.TemplateManager.renderFromSkin(TemplateManager.java:526) [xwiki-platform-legacy-oldcore-6.4.jar:na]
	at com.xpn.xwiki.internal.template.TemplateManager.render(TemplateManager.java:512) [xwiki-platform-legacy-oldcore-6.4.jar:na]
	at com.xpn.xwiki.XWiki.evaluateTemplate(XWiki.java:1712) [xwiki-platform-legacy-oldcore-6.4.jar:na]
	at com.xpn.xwiki.web.Utils.parseTemplate(Utils.java:179) [xwiki-platform-legacy-oldcore-6.4.jar:na]
	at com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:355) [xwiki-platform-legacy-oldcore-6.4.jar:na]
	at com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:146) [xwiki-platform-legacy-oldcore-6.4.jar:na]
	at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:425) [struts-core-1.3.10.jar:1.3.10]
	at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:228) [struts-core-1.3.10.jar:1.3.10]
	at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913) [struts-core-1.3.10.jar:1.3.10]
	at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:462) [struts-core-1.3.10.jar:1.3.10]
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:643) [servlet-api.jar:na]
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:723) [servlet-api.jar:na]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) [catalina.jar:6.0.37]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) [catalina.jar:6.0.37]
	at com.xpn.xwiki.web.ActionFilter.doFilter(ActionFilter.java:115) [xwiki-platform-legacy-oldcore-6.4.jar:na]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) [catalina.jar:6.0.37]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) [catalina.jar:6.0.37]
	at org.xwiki.wysiwyg.server.filter.ConversionFilter.doFilter(ConversionFilter.java:127) [xwiki-platform-wysiwyg-server-6.4.jar:na]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) [catalina.jar:6.0.37]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) [catalina.jar:6.0.37]
	at org.xwiki.container.servlet.filters.internal.SetHTTPHeaderFilter.doFilter(SetHTTPHeaderFilter.java:63) [xwiki-platform-container-servlet-6.4.jar:na]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) [catalina.jar:6.0.37]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) [catalina.jar:6.0.37]
	at com.xpn.xwiki.plugin.webdav.XWikiDavFilter.doFilter(XWikiDavFilter.java:66) [xwiki-platform-webdav-server-6.4.jar:na]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) [catalina.jar:6.0.37]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) [catalina.jar:6.0.37]
	at org.xwiki.container.servlet.filters.internal.SavedRequestRestorerFilter.doFilter(SavedRequestRestorerFilter.java:208) [xwiki-platform-container-servlet-6.4.jar:na]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) [catalina.jar:6.0.37]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) [catalina.jar:6.0.37]
	at org.xwiki.container.servlet.filters.internal.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:111) [xwiki-platform-container-servlet-6.4.jar:na]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) [catalina.jar:6.0.37]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) [catalina.jar:6.0.37]
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233) [catalina.jar:6.0.37]
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191) [catalina.jar:6.0.37]
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) [catalina.jar:6.0.37]
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103) [catalina.jar:6.0.37]
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) [catalina.jar:6.0.37]
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293) [catalina.jar:6.0.37]
	at org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:879) [tomcat-coyote.jar:6.0.37]
	at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:617) [tomcat-coyote.jar:6.0.37]
	at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1760) [tomcat-coyote.jar:6.0.37]
	at java.lang.Thread.run(Thread.java:745) [na:1.7.0_67]