How to reproduce :

• I create a page toto : http://localhost:8080/fr/toto.html
• In this page, I insert contents validated
• I go to http://localhost:8080/fr/toto.html I see my page toto
• I delete the page toto without removing contents
• I create an alias : /fr/toto -> /fr/fonctionnalites-avancees/agenda.html
• I go to http://localhost:8080/fr/toto.html I see my page toto
• I open a new navigator, I go to the page http://localhost:8080/fr/toto.html, the next error appears :

  Resource not found for URL http://localhost:8080/cms/generate/www/fr/toto.html?_contextPath=&_baseServerPath=http://localhost:8080&_initialRequest=%2Ffr%2Ftoto.htmlorg.apache.cocoon.ResourceNotFoundException: Resource not found for URL http://localhost:8080/cms/generate/www/fr/toto.html?_contextPath=&_baseServerPath=http://localhost:8080&_initialRequest=%2Ffr%2Ftoto.html
  	at org.ametys.site.GeneratePageAction.act(GeneratePageAction.java:165)
  	at org.apache.cocoon.components.treeprocessor.sitemap.ActTypeNode.invoke(ActTypeNode.java:120)
  	at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:47)
  	at org.apache.cocoon.components.treeprocessor.sitemap.MatchNode.invoke(MatchNode.java:108)
  	at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:69)
  	at org.apache.cocoon.components.treeprocessor.sitemap.PipelineNode.invoke(PipelineNode.java:143)
  	at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:69)
  	at org.apache.cocoon.components.treeprocessor.sitemap.PipelinesNode.invoke(PipelinesNode.java:93)
  	at org.apache.cocoon.components.treeprocessor.ConcreteTreeProcessor.process(ConcreteTreeProcessor.java:236)
  	at org.apache.cocoon.components.treeprocessor.ConcreteTreeProcessor.handleCocoonRedirect(ConcreteTreeProcessor.java:300)
  	at org.apache.cocoon.components.treeprocessor.ConcreteTreeProcessor.access$000(ConcreteTreeProcessor.java:49)
  	at org.apache.cocoon.components.treeprocessor.ConcreteTreeProcessor$TreeProcessorRedirector.cocoonRedirect(ConcreteTreeProcessor.java:348)
  	at org.apache.cocoon.environment.ForwardRedirector.redirect(ForwardRedirector.java:60)
  	at org.apache.cocoon.components.treeprocessor.sitemap.RedirectToURINode.invoke(RedirectToURINode.java:70)
  	at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:47)
  	at org.apache.cocoon.components.treeprocessor.sitemap.ActTypeNode.invoke(ActTypeNode.java:139)
  	at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:47)
  	at org.apache.cocoon.components.treeprocessor.sitemap.MatchNode.invoke(MatchNode.java:108)
  	at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:69)
  	at org.apache.cocoon.components.treeprocessor.sitemap.PipelineNode.invoke(PipelineNode.java:143)
  	at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:69)
  	at org.apache.cocoon.components.treeprocessor.sitemap.PipelinesNode.invoke(PipelinesNode.java:93)
  	at org.apache.cocoon.components.treeprocessor.ConcreteTreeProcessor.process(ConcreteTreeProcessor.java:236)
  	at org.apache.cocoon.components.treeprocessor.ConcreteTreeProcessor.process(ConcreteTreeProcessor.java:178)
  	at org.apache.cocoon.components.treeprocessor.TreeProcessor.process(TreeProcessor.java:254)
  	at org.apache.cocoon.components.treeprocessor.sitemap.MountNode.invoke(MountNode.java:118)
  	at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:47)
  	at org.apache.cocoon.components.treeprocessor.sitemap.MatchNode.invoke(MatchNode.java:108)
  	at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:69)
  	at org.apache.cocoon.components.treeprocessor.sitemap.PipelineNode.invoke(PipelineNode.java:143)
  	at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:69)
  	at org.apache.cocoon.components.treeprocessor.sitemap.PipelinesNode.invoke(PipelinesNode.java:93)
  	at org.apache.cocoon.components.treeprocessor.ConcreteTreeProcessor.process(ConcreteTreeProcessor.java:236)
  	at org.apache.cocoon.components.treeprocessor.ConcreteTreeProcessor.process(ConcreteTreeProcessor.java:178)
  	at org.apache.cocoon.components.treeprocessor.TreeProcessor.process(TreeProcessor.java:254)
  	at org.apache.cocoon.Cocoon.process(Cocoon.java:699)
  	at org.apache.cocoon.servlet.CocoonServlet.service(CocoonServlet.java:1159)
  	at org.ametys.runtime.servlet.RuntimeServlet._doService(RuntimeServlet.java:135)
  	at org.ametys.runtime.servlet.RuntimeServlet.service(RuntimeServlet.java:92)
  	at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
  	at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
  	at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:390)
  	at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
  	at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
  	at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
  	at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418)
  	at org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:230)
  	at org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:114)
  	at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
  	at org.mortbay.jetty.Server.handle(Server.java:326)
  	at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:536)
  	at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:915)
  	at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:539)
  	at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)
  	at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:405)
  	at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409)
  	at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)