Hi,

exatly the same problems we were having. I opened Jira issue because of
this:

https://issues.apache.org/jira/browse/TAP5-623

For us the main reason was because we had 

<label for="someid" />

and then

<t:if test="readmode">
   ${value}
   <t:parameter name="else">
      <t:textfield t:id="someid" value="value" />
   </t:parameter>
</t:if>

Now with T5.0.18 this worked fine, but now dies in 5.1.0.2 if it is
readmode: (label gets null for parameter) - givin only some T5 internal
stacktrace or the unsupported form of compression..

 Hope this helps,

 - Ville



Andy Blower wrote:
> 
> Another day, another couple of stumbling blocks for our applications
> migration to T5.1 - I can't believe this has taken a solid week of effort
> so far. I'm starting to wonder if we jumped the gun on moving to T5.1 so
> soon? I do seem to be having more problems than most people on the list,
> so maybe it's just me / our app or something.
> 
> Anyway, the first issue is with our checkbox components that do an Ajax
> call when checked or unchecked. They work fine if Gzip compression is
> switched off, but if it's enabled the Ajax.Request hits the onException
> block with this error message "TypeError: response is null". The server
> event handler is being called correctly and returning the correct
> JSONObject, but the responseText is empty and responseXML, responseJSON,
> and headerJSON are all null even though the status code is 200. My guess
> that the JSONObject is being compressed and it shouldn't be. Should I
> raise a JIRA for this, or am I mistaken here?
> 
> I also have a page that works fine with T5.0.18 but breaks in T5.1.0.2 and
> I have no idea why - curiously, if I have gzip compression I don't see the
> stacktrace in the browser, but I get "Content Encoding Error", "The page
> you are trying to view cannot be shown because it uses an invalid or
> unsupported form of compression." From Firefox.
> 
> Here is the stack trace, in case anyone can make any sense of it:
> 
> An unexpected application exception has occurred.
> 
>  *   java.lang.NullPointerException
>     *  
> org.apache.tapestry5.dom.AbstractMarkupModel.encodeQuoted(AbstractMarkupModel.java:94)
>     *   org.apache.tapestry5.dom.Attribute.render(Attribute.java:69)
>     *   org.apache.tapestry5.dom.Element.toMarkup(Element.java:313)
>     *  
> org.apache.tapestry5.dom.Element.writeChildMarkup(Element.java:835)
>     *   org.apache.tapestry5.dom.Element.toMarkup(Element.java:351)
>     *  
> org.apache.tapestry5.dom.Element.writeChildMarkup(Element.java:835)
>     *   org.apache.tapestry5.dom.Element.toMarkup(Element.java:351)
>     *  
> org.apache.tapestry5.dom.Element.writeChildMarkup(Element.java:835)
>     *   org.apache.tapestry5.dom.Element.toMarkup(Element.java:351)
>     *  
> org.apache.tapestry5.dom.Element.writeChildMarkup(Element.java:835)
>     *   org.apache.tapestry5.dom.Element.toMarkup(Element.java:351)
>     *  
> org.apache.tapestry5.dom.Element.writeChildMarkup(Element.java:835)
>     *   org.apache.tapestry5.dom.Element.toMarkup(Element.java:351)
>     *  
> org.apache.tapestry5.dom.Element.writeChildMarkup(Element.java:835)
>     *   org.apache.tapestry5.dom.Element.toMarkup(Element.java:351)
>     *  
> org.apache.tapestry5.dom.Element.writeChildMarkup(Element.java:835)
>     *   org.apache.tapestry5.dom.Element.toMarkup(Element.java:351)
>     *  
> org.apache.tapestry5.dom.Element.writeChildMarkup(Element.java:835)
>     *   org.apache.tapestry5.dom.Element.toMarkup(Element.java:351)
>     *  
> org.apache.tapestry5.dom.Element.writeChildMarkup(Element.java:835)
>     *   org.apache.tapestry5.dom.Element.toMarkup(Element.java:351)
>     *  
> org.apache.tapestry5.dom.Element.writeChildMarkup(Element.java:835)
>     *   org.apache.tapestry5.dom.Element.toMarkup(Element.java:351)
>     *  
> org.apache.tapestry5.dom.Element.writeChildMarkup(Element.java:835)
>     *   org.apache.tapestry5.dom.Element.toMarkup(Element.java:351)
>     *  
> org.apache.tapestry5.dom.Element.writeChildMarkup(Element.java:835)
>     *   org.apache.tapestry5.dom.Element.toMarkup(Element.java:351)
>     *  
> org.apache.tapestry5.dom.Element.writeChildMarkup(Element.java:835)
>     *   org.apache.tapestry5.dom.Element.toMarkup(Element.java:351)
>     *   org.apache.tapestry5.dom.Document.toMarkup(Document.java:163)
>     *   org.apache.tapestry5.dom.Node.toMarkup(Node.java:80)
>     *  
> org.apache.tapestry5.internal.services.MarkupWriterImpl.toMarkup(MarkupWriterImpl.java:57)
>     *  
> org.apache.tapestry5.internal.services.PageResponseRendererImpl.renderPageResponse(PageResponseRendererImpl.java:67)
>     *  
> $PageResponseRenderer_12085541484.renderPageResponse($PageResponseRenderer_12085541484.java)
>     *  
> org.apache.tapestry5.internal.services.PageRenderRequestHandlerImpl.handle(PageRenderRequestHandlerImpl.java:63)
>     *  
> org.apache.tapestry5.services.TapestryModule$33.handle(TapestryModule.java:1952)
>     *  
> $PageRenderRequestHandler_12085541485.handle($PageRenderRequestHandler_12085541485.java)
>     *  
> $PageRenderRequestHandler_12085541478.handle($PageRenderRequestHandler_12085541478.java)
>     *  
> org.apache.tapestry5.internal.services.ComponentRequestHandlerTerminator.handlePageRender(ComponentRequestHandlerTerminator.java:48)
>     *  
> $ComponentRequestHandler_1208554147e.handlePageRender($ComponentRequestHandler_1208554147e.java)
>     *  
> org.apache.tapestry5.internal.services.PageRenderDispatcher.dispatch(PageRenderDispatcher.java:45)
>     *   $Dispatcher_12085541480.dispatch($Dispatcher_12085541480.java)
>     *   $Dispatcher_12085541472.dispatch($Dispatcher_12085541472.java)
>     *  
> org.apache.tapestry5.services.TapestryModule$RequestHandlerTerminator.service(TapestryModule.java:250)
>     *  
> org.apache.tapestry5.internal.services.RequestErrorFilter.service(RequestErrorFilter.java:26)
>     *  
> $RequestHandler_12085541473.service($RequestHandler_12085541473.java)
>     *  
> org.apache.tapestry5.services.TapestryModule$4.service(TapestryModule.java:782)
>     *  
> $RequestHandler_12085541473.service($RequestHandler_12085541473.java)
>     *  
> org.apache.tapestry5.services.TapestryModule$3.service(TapestryModule.java:771)
>     *  
> $RequestHandler_12085541473.service($RequestHandler_12085541473.java)
>     *  
> org.apache.tapestry5.internal.services.StaticFilesFilter.service(StaticFilesFilter.java:85)
>     *  
> $RequestHandler_12085541473.service($RequestHandler_12085541473.java)
>     *  
> com.proquest.apps.corelib.AppCoreLibModule$4.service(AppCoreLibModule.java:209)
>     *  
> $RequestFilter_1208554146f.service($RequestFilter_1208554146f.java)
>     *  
> $RequestHandler_12085541473.service($RequestHandler_12085541473.java)
>     *  
> org.apache.tapestry5.internal.services.CheckForUpdatesFilter$2.invoke(CheckForUpdatesFilter.java:90)
>     *  
> org.apache.tapestry5.internal.services.CheckForUpdatesFilter$2.invoke(CheckForUpdatesFilter.java:81)
>     *  
> org.apache.tapestry5.ioc.internal.util.ConcurrentBarrier.withRead(ConcurrentBarrier.java:85)
>     *  
> org.apache.tapestry5.internal.services.CheckForUpdatesFilter.service(CheckForUpdatesFilter.java:103)
>     *  
> $RequestHandler_12085541473.service($RequestHandler_12085541473.java)
>     *  
> $RequestHandler_1208554146b.service($RequestHandler_1208554146b.java)
>     *  
> org.apache.tapestry5.services.TapestryModule$HttpServletRequestHandlerTerminator.service(TapestryModule.java:202)
>     *  
> org.apache.tapestry5.internal.services.IgnoredPathsFilter.service(IgnoredPathsFilter.java:62)
>     *  
> $HttpServletRequestFilter_1208554146a.service($HttpServletRequestFilter_1208554146a.java)
>     *  
> $HttpServletRequestHandler_1208554146d.service($HttpServletRequestHandler_1208554146d.java)
>     *  
> org.apache.tapestry5.services.TapestryModule$2.service(TapestryModule.java:730)
>     *  
> $HttpServletRequestHandler_1208554146d.service($HttpServletRequestHandler_1208554146d.java)
>     *  
> $HttpServletRequestHandler_12085541468.service($HttpServletRequestHandler_12085541468.java)
>     *  
> org.apache.tapestry5.TapestryFilter.doFilter(TapestryFilter.java:127)
>     *  
> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1084)
>     *  
> org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:360)
>     *  
> org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
>     *  
> org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
>     *  
> org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:722)
>     *  
> org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:404)
>     *  
> org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:139)
>     *   org.mortbay.jetty.Server.handle(Server.java:324)
>     *  
> org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:505)
>     *  
> org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:828)
>     *   org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:514)
>     *   org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:211)
>     *   org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:380)
>     *  
> org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:395)
>     *  
> org.mortbay.thread.BoundedThreadPool$PoolThread.run(BoundedThreadPool.java:450)
> Tapestry Framework
> Tapestry Version
> 5.1.0.2
> 
> 
> 

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