Error occurred in portlet!

EXCEPTION:
javax.portlet.PortletException
	at org.apache.pluto.core.impl.PortletRequestDispatcherImpl.include(PortletRequestDispatcherImpl.java:76)
	at com.finalist.cmsc.portlets.CmscPortlet.doInclude(CmscPortlet.java:548)
	at com.finalist.cmsc.portlets.CmscPortlet.doView(CmscPortlet.java:466)
	at com.finalist.cmsc.portlets.AbstractContentPortlet.doView(AbstractContentPortlet.java:289)
	at com.finalist.cmsc.portlets.ContentChannelPortlet.doView(ContentChannelPortlet.java:110)
	at com.finalist.cmsc.portlets.CmscPortlet.doDispatch(CmscPortlet.java:277)
	at javax.portlet.GenericPortlet.render(GenericPortlet.java:175)
	at com.finalist.cmsc.portalImpl.PortletServlet.dispatch(PortletServlet.java:136)
	at com.finalist.cmsc.portalImpl.PortletServlet.doGet(PortletServlet.java:96)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:627)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
	at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:679)
	at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:548)
	at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:497)
	at com.finalist.pluto.container.invoker.impl.PortletInvokerImpl.invoke(PortletInvokerImpl.java:103)
	at com.finalist.pluto.container.invoker.impl.PortletInvokerImpl.render(PortletInvokerImpl.java:68)
	at org.apache.pluto.PortletContainerImpl.renderPortlet(PortletContainerImpl.java:119)
	at com.finalist.pluto.portalImpl.core.PortletContainerWrapperImpl.renderPortlet(PortletContainerWrapperImpl.java:53)
	at com.finalist.pluto.portalImpl.aggregation.PortletFragment.service(PortletFragment.java:270)
	at com.finalist.pluto.portalImpl.aggregation.ScreenFragment.service(ScreenFragment.java:57)
	at com.finalist.cmsc.portalImpl.PageNavigationRenderer.render(PageNavigationRenderer.java:67)
	at com.finalist.cmsc.portalImpl.PortalServlet.doRender(PortalServlet.java:199)
	at com.finalist.cmsc.portalImpl.PortalServlet.processRenderPhase(PortalServlet.java:176)
	at com.finalist.cmsc.portalImpl.PortalServlet.service(PortalServlet.java:148)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
	at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:679)
	at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:461)
	at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:364)
	at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:301)
	at com.finalist.cmsc.filters.FriendlyUrlFilter.doFilter(FriendlyUrlFilter.java:102)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
	at org.mmbase.servlet.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:149)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
	at net.sf.mmapps.commons.web.CloudThreadFilter.doFilter(CloudThreadFilter.java:33)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
	at com.finalist.cmsc.filters.DisableUrlSessionFilter.doFilter(DisableUrlSessionFilter.java:103)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:172)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:174)
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:875)
	at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665)
	at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528)
	at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81)
	at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689)
	at java.lang.Thread.run(Unknown Source)
Caused by: org.mmbase.bridge.NotFoundException: Something went wrong while getting node with number '': Node not found !! (key = '') by cloud with account U-491493
	at org.mmbase.bridge.implementation.BasicCloud.getNode(BasicCloud.java:231)
	at org.mmbase.bridge.jsp.taglib.NodeTag.doStartTag(NodeTag.java:151)
	at org.apache.jsp.WEB_002dINF.templates.view.sinomachfair.exhibitionNewsBar_jsp._jspx_meth_mm_005fnode_005f0(exhibitionNewsBar_jsp.java:535)
	at org.apache.jsp.WEB_002dINF.templates.view.sinomachfair.exhibitionNewsBar_jsp._jspService(exhibitionNewsBar_jsp.java:190)
	at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
	at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:331)
	at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:329)
	at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
	at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:679)
	at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:584)
	at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:497)
	at org.apache.pluto.core.impl.PortletRequestDispatcherImpl.include(PortletRequestDispatcherImpl.java:65)
	... 56 more
Caused by: java.lang.RuntimeException: Node not found !! (key = '')
	at org.mmbase.module.core.TemporaryNodeManager.getNode(TemporaryNodeManager.java:126)
	at org.mmbase.bridge.implementation.BasicCloud.getNode(BasicCloud.java:229)
	... 71 more

Nested Exception is org.mmbase.bridge.NotFoundException: Something went wrong while getting node with number '': Node not found !! (key = '') by cloud with account U-491493
	at org.mmbase.bridge.implementation.BasicCloud.getNode(BasicCloud.java:231)
	at org.mmbase.bridge.jsp.taglib.NodeTag.doStartTag(NodeTag.java:151)
	at org.apache.jsp.WEB_002dINF.templates.view.sinomachfair.exhibitionNewsBar_jsp._jspx_meth_mm_005fnode_005f0(exhibitionNewsBar_jsp.java:535)
	at org.apache.jsp.WEB_002dINF.templates.view.sinomachfair.exhibitionNewsBar_jsp._jspService(exhibitionNewsBar_jsp.java:190)
	at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
	at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:331)
	at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:329)
	at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
	at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:679)
	at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:584)
	at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:497)
	at org.apache.pluto.core.impl.PortletRequestDispatcherImpl.include(PortletRequestDispatcherImpl.java:65)
	at com.finalist.cmsc.portlets.CmscPortlet.doInclude(CmscPortlet.java:548)
	at com.finalist.cmsc.portlets.CmscPortlet.doView(CmscPortlet.java:466)
	at com.finalist.cmsc.portlets.AbstractContentPortlet.doView(AbstractContentPortlet.java:289)
	at com.finalist.cmsc.portlets.ContentChannelPortlet.doView(ContentChannelPortlet.java:110)
	at com.finalist.cmsc.portlets.CmscPortlet.doDispatch(CmscPortlet.java:277)
	at javax.portlet.GenericPortlet.render(GenericPortlet.java:175)
	at com.finalist.cmsc.portalImpl.PortletServlet.dispatch(PortletServlet.java:136)
	at com.finalist.cmsc.portalImpl.PortletServlet.doGet(PortletServlet.java:96)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:627)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
	at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:679)
	at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:548)
	at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:497)
	at com.finalist.pluto.container.invoker.impl.PortletInvokerImpl.invoke(PortletInvokerImpl.java:103)
	at com.finalist.pluto.container.invoker.impl.PortletInvokerImpl.render(PortletInvokerImpl.java:68)
	at org.apache.pluto.PortletContainerImpl.renderPortlet(PortletContainerImpl.java:119)
	at com.finalist.pluto.portalImpl.core.PortletContainerWrapperImpl.renderPortlet(PortletContainerWrapperImpl.java:53)
	at com.finalist.pluto.portalImpl.aggregation.PortletFragment.service(PortletFragment.java:270)
	at com.finalist.pluto.portalImpl.aggregation.ScreenFragment.service(ScreenFragment.java:57)
	at com.finalist.cmsc.portalImpl.PageNavigationRenderer.render(PageNavigationRenderer.java:67)
	at com.finalist.cmsc.portalImpl.PortalServlet.doRender(PortalServlet.java:199)
	at com.finalist.cmsc.portalImpl.PortalServlet.processRenderPhase(PortalServlet.java:176)
	at com.finalist.cmsc.portalImpl.PortalServlet.service(PortalServlet.java:148)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
	at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:679)
	at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:461)
	at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:364)
	at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:301)
	at com.finalist.cmsc.filters.FriendlyUrlFilter.doFilter(FriendlyUrlFilter.java:102)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
	at org.mmbase.servlet.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:149)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
	at net.sf.mmapps.commons.web.CloudThreadFilter.doFilter(CloudThreadFilter.java:33)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
	at com.finalist.cmsc.filters.DisableUrlSessionFilter.doFilter(DisableUrlSessionFilter.java:103)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:172)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:174)
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:875)
	at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665)
	at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528)
	at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81)
	at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689)
	at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.RuntimeException: Node not found !! (key = '')
	at org.mmbase.module.core.TemporaryNodeManager.getNode(TemporaryNodeManager.java:126)
	at org.mmbase.bridge.implementation.BasicCloud.getNode(BasicCloud.java:229)
	... 71 more

Cause:
org.mmbase.bridge.NotFoundException: Something went wrong while getting node with number '': Node not found !! (key = '') by cloud with account U-491493
	at org.mmbase.bridge.implementation.BasicCloud.getNode(BasicCloud.java:231)
	at org.mmbase.bridge.jsp.taglib.NodeTag.doStartTag(NodeTag.java:151)
	at org.apache.jsp.WEB_002dINF.templates.view.sinomachfair.exhibitionNewsBar_jsp._jspx_meth_mm_005fnode_005f0(exhibitionNewsBar_jsp.java:535)
	at org.apache.jsp.WEB_002dINF.templates.view.sinomachfair.exhibitionNewsBar_jsp._jspService(exhibitionNewsBar_jsp.java:190)
	at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
	at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:331)
	at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:329)
	at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
	at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:679)
	at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:584)
	at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:497)
	at org.apache.pluto.core.impl.PortletRequestDispatcherImpl.include(PortletRequestDispatcherImpl.java:65)
	at com.finalist.cmsc.portlets.CmscPortlet.doInclude(CmscPortlet.java:548)
	at com.finalist.cmsc.portlets.CmscPortlet.doView(CmscPortlet.java:466)
	at com.finalist.cmsc.portlets.AbstractContentPortlet.doView(AbstractContentPortlet.java:289)
	at com.finalist.cmsc.portlets.ContentChannelPortlet.doView(ContentChannelPortlet.java:110)
	at com.finalist.cmsc.portlets.CmscPortlet.doDispatch(CmscPortlet.java:277)
	at javax.portlet.GenericPortlet.render(GenericPortlet.java:175)
	at com.finalist.cmsc.portalImpl.PortletServlet.dispatch(PortletServlet.java:136)
	at com.finalist.cmsc.portalImpl.PortletServlet.doGet(PortletServlet.java:96)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:627)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
	at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:679)
	at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:548)
	at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:497)
	at com.finalist.pluto.container.invoker.impl.PortletInvokerImpl.invoke(PortletInvokerImpl.java:103)
	at com.finalist.pluto.container.invoker.impl.PortletInvokerImpl.render(PortletInvokerImpl.java:68)
	at org.apache.pluto.PortletContainerImpl.renderPortlet(PortletContainerImpl.java:119)
	at com.finalist.pluto.portalImpl.core.PortletContainerWrapperImpl.renderPortlet(PortletContainerWrapperImpl.java:53)
	at com.finalist.pluto.portalImpl.aggregation.PortletFragment.service(PortletFragment.java:270)
	at com.finalist.pluto.portalImpl.aggregation.ScreenFragment.service(ScreenFragment.java:57)
	at com.finalist.cmsc.portalImpl.PageNavigationRenderer.render(PageNavigationRenderer.java:67)
	at com.finalist.cmsc.portalImpl.PortalServlet.doRender(PortalServlet.java:199)
	at com.finalist.cmsc.portalImpl.PortalServlet.processRenderPhase(PortalServlet.java:176)
	at com.finalist.cmsc.portalImpl.PortalServlet.service(PortalServlet.java:148)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
	at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:679)
	at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:461)
	at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:364)
	at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:301)
	at com.finalist.cmsc.filters.FriendlyUrlFilter.doFilter(FriendlyUrlFilter.java:102)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
	at org.mmbase.servlet.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:149)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
	at net.sf.mmapps.commons.web.CloudThreadFilter.doFilter(CloudThreadFilter.java:33)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
	at com.finalist.cmsc.filters.DisableUrlSessionFilter.doFilter(DisableUrlSessionFilter.java:103)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:172)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:174)
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:875)
	at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665)
	at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528)
	at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81)
	at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689)
	at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.RuntimeException: Node not found !! (key = '')
	at org.mmbase.module.core.TemporaryNodeManager.getNode(TemporaryNodeManager.java:126)
	at org.mmbase.bridge.implementation.BasicCloud.getNode(BasicCloud.java:229)
	... 71 more

Cause:
java.lang.RuntimeException: Node not found !! (key = '')
	at org.mmbase.module.core.TemporaryNodeManager.getNode(TemporaryNodeManager.java:126)
	at org.mmbase.bridge.implementation.BasicCloud.getNode(BasicCloud.java:229)
	at org.mmbase.bridge.jsp.taglib.NodeTag.doStartTag(NodeTag.java:151)
	at org.apache.jsp.WEB_002dINF.templates.view.sinomachfair.exhibitionNewsBar_jsp._jspx_meth_mm_005fnode_005f0(exhibitionNewsBar_jsp.java:535)
	at org.apache.jsp.WEB_002dINF.templates.view.sinomachfair.exhibitionNewsBar_jsp._jspService(exhibitionNewsBar_jsp.java:190)
	at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
	at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:331)
	at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:329)
	at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
	at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:679)
	at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:584)
	at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:497)
	at org.apache.pluto.core.impl.PortletRequestDispatcherImpl.include(PortletRequestDispatcherImpl.java:65)
	at com.finalist.cmsc.portlets.CmscPortlet.doInclude(CmscPortlet.java:548)
	at com.finalist.cmsc.portlets.CmscPortlet.doView(CmscPortlet.java:466)
	at com.finalist.cmsc.portlets.AbstractContentPortlet.doView(AbstractContentPortlet.java:289)
	at com.finalist.cmsc.portlets.ContentChannelPortlet.doView(ContentChannelPortlet.java:110)
	at com.finalist.cmsc.portlets.CmscPortlet.doDispatch(CmscPortlet.java:277)
	at javax.portlet.GenericPortlet.render(GenericPortlet.java:175)
	at com.finalist.cmsc.portalImpl.PortletServlet.dispatch(PortletServlet.java:136)
	at com.finalist.cmsc.portalImpl.PortletServlet.doGet(PortletServlet.java:96)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:627)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
	at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:679)
	at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:548)
	at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:497)
	at com.finalist.pluto.container.invoker.impl.PortletInvokerImpl.invoke(PortletInvokerImpl.java:103)
	at com.finalist.pluto.container.invoker.impl.PortletInvokerImpl.render(PortletInvokerImpl.java:68)
	at org.apache.pluto.PortletContainerImpl.renderPortlet(PortletContainerImpl.java:119)
	at com.finalist.pluto.portalImpl.core.PortletContainerWrapperImpl.renderPortlet(PortletContainerWrapperImpl.java:53)
	at com.finalist.pluto.portalImpl.aggregation.PortletFragment.service(PortletFragment.java:270)
	at com.finalist.pluto.portalImpl.aggregation.ScreenFragment.service(ScreenFragment.java:57)
	at com.finalist.cmsc.portalImpl.PageNavigationRenderer.render(PageNavigationRenderer.java:67)
	at com.finalist.cmsc.portalImpl.PortalServlet.doRender(PortalServlet.java:199)
	at com.finalist.cmsc.portalImpl.PortalServlet.processRenderPhase(PortalServlet.java:176)
	at com.finalist.cmsc.portalImpl.PortalServlet.service(PortalServlet.java:148)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
	at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:679)
	at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:461)
	at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:364)
	at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:301)
	at com.finalist.cmsc.filters.FriendlyUrlFilter.doFilter(FriendlyUrlFilter.java:102)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
	at org.mmbase.servlet.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:149)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
	at net.sf.mmapps.commons.web.CloudThreadFilter.doFilter(CloudThreadFilter.java:33)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
	at com.finalist.cmsc.filters.DisableUrlSessionFilter.doFilter(DisableUrlSessionFilter.java:103)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:172)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:174)
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:875)
	at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665)
	at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528)
	at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81)
	at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689)
	at java.lang.Thread.run(Unknown Source)

中国中元担任世界最大的单口径望远镜工程的咨询设计工作

2009.03.23

近日,由中国中元国际工程公司(中国中元)担任咨询设计的500米口径球面射电望远镜(FAST)工程奠基典礼在贵州举行。
FAST工程是国家科教领导小组审议确定的国家九大科技基础设施之一,被列入国家高技术产业发展项目计划。该项目拟采用我国科学家独创的设计,利用贵州省 平塘县内喀斯特洼地的独特地形条件,建设一个接受面积约为30个足球场大的高灵敏度巨型射电望远镜。FAST建成后将成为世界上最大口径的射电望远镜。与 号称“地面最大的机器”的德国波恩100米望远镜相比,FAST的灵敏度提高约10倍;其综合性能比被评为人类20世纪十大工程之首的美国Arecibo  300米望远镜提高约10倍。
项目建成后,将形成具有国际先进水平的天文观测与研究平台,为我国开展暗物质和暗能量本质、宇宙的起源和演化、太空生命起源和寻找地外文明等研究活动提供 重要支持。国际天文学界希望,这个500米口径的“天眼”建成后,能帮助地球人接收到某种来自“地外文明”的信号,并揭开宇宙起源之谜。作为世界最大的单 口径望远镜,FAST将在未来20~30年保持世界一流设备的地位,并将吸引国内外一流人才和前沿科研课题,成为国际天文学术交流中心。
FAST项目从提出到工程方案的理论和模型试验、台址水文和工程地址勘察等预研究,共历时15年。平塘独一无二的喀斯特洼地形态、地质条件和极端安静的电 波环境,为FAST建设提供了优良台址。全新的设计思路、得天独厚的台址优势,使FAST突破了地面望远镜的百米工程极限,开创了建造巨型射电望远镜的新 模式。
FSAT工程的主要建设内容包括台址勘查与开挖、主动反射面系统、馈源支撑系统、测量与控制系统、馈源与接收机系统、观测基地建设六大部分。由于FAST 工程地处贵州深山区,地况复杂,工程施工量大难度高,科学系统技术要求严格,对各专业设计都是新的挑战,中国中元的工程师们正同科学家们一道探索这一全新 工程的设计,目前设计工作正在有条不紊的进行中。
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