"processing" without results on Apache+Tomcat+ZK

answered 2009-10-05 21:14:01 +0800

barema
69 ● 1

Well,

I've just disabled the event processing thread: no difference I'm afraid.
Below is the code that calls the center content:

The base page is an "index.zul" with the following structure (I've left out some static content for readability):

<?page id="homePage" contentType="text/html;charset=UTF-8"?>
<zk xmlns:h="http://www.w3.org/1999/xhtml">
<style src="resources/css/default.css"/>
<h:div id="header">
<h:h1><h:a href="#">e-HR tool (analysemodel)</h:a></h:h1>
<h:h2><!-- <include id="searchbar" src="searchbar.zul"/>--> zoek <textbox /></h:h2> <!-- searchBox at right top-->
</h:div>
<h:div id="content">
<h:div id="colOne">
<h:div id="menu">
<include id="menubar" src="menubar.zul"/> <!--this is the menubar on top-->
</h:div>
<h:div style="padding: 0px;">
<hbox>
<include id="navigatieStructuur" src="navigatiestructuur.zul" /><!-- this is the navigation structure on the left-->
<splitter id="s2" collapse="before"/>
<include id="detailScherm" src="introductiescherm.zul" /><!--this is the center content page-->
</hbox>
</h:div>
</h:div>
<h:div id="colTwo">
<!-- right column content goes here -->
</h:div>
<h:div style="clear: both;"> </h:div>
</h:div>
</zk>

the menubar (top) has the following structure:

<?page title="menubar" contentType="text/html;charset=UTF-8"?>
<zk>
<style>
div.z-menubar-hor{
padding: none;
background: none;
border: none;
}
</style>
<zscript>
void showPanel(target){
inc = Path.getComponent("//homePage/detailScherm");
inc.setSrc(null);
inc.setSrc(target+".zul");
}
</zscript>
<menubar id="menubar">
<menu label="onze organisatie" src="/resources/images/orgchart.gif">
<menupopup>
<menuitem src="/resources/images/vcard.png" label="bedrijfsvoorstelling" onClick="showPanel("bedrijfsvoorstelling");" />
<menuitem src="/resources/images/orgchart.gif" label="organigram / who is who" onClick="showPanel("orgchart");" />
<menuitem src="/resources/images/help.png" label="who does what" onClick="showPanel("zoekscherm");" />
<menuitem src="/resources/images/group.png" label="overzicht medewerkers" onClick="showPanel("medewerkersoverzicht");" />
<menuitem label="contactbeheer" onClick="showPanel("rolodex");"/>
<menuitem label="rapporten en modeldocumenten" onClick="alert(self.label)"/>
</menupopup>
</menu>
<!-- followed by more of the same -->
</menubar>
</zk>

the code in the zscript loads another .zul page into the center.
The funny thing is: the first try always work, the second & following always fail.

Left side navigation sits in navigatiestructuur.zul:

<?xml version="1.0" encoding="UTF-8"?>
<zk xmlns:h="http://www.w3.org/1999/xhtml">
<style>
div.z-tree-cell-cnt{
font-size: smaller;
}
</style>
<zscript>
void showPanel(target){
inc = Path.getComponent("//homePage/detailScherm");
inc.setSrc(null);
inc.setSrc(target+".zul");
}
</zscript>
<tree id="tree" width="200px" height="600px">
<treecols sizable="true">
<treecol/>
</treecols>
<treechildren>
<treeitem open="false">
<treerow>
<treecell label="organisatie / wie is wie" />
</treerow>
<treechildren>
<treeitem>
<treerow>
<treecell label="bedrijfsvoorstelling - communicatie" onClick="showPanel("bedrijfsvoorstelling");"/>
</treerow>
</treeitem>
... and so on

Any further suggestions ?

answered 2009-10-05 21:38:02 +0800

barema
69 ● 1

Apparently the message "The event processing thread stops" doesn't seem to be created when the problems occur... my mistake!
(unfortunately, the problem is still there)

answered 2009-10-06 12:37:55 +0800

barema
69 ● 1

I'll certainly try to do it this way, but one thing keeps on bothering me:
when working locally (on localhost & directly on Tomcat, not via Apache), my current approach works like a charm. It's only when using a remote connection (over Apache to Tomcat) that this problem occurs. So, I'm afraid it might have to do with servers & sessions too.

Anyway, I'll try the following:
* try the approach you suggest (Executions.createComponents())
* remove the apache-front (and connect to Tomcat directly) to see if this gives a different result
* try your suggested approach in combination with the direct connection to Tomcat

Thanks for the suggestions so far!
Bart

answered 2009-10-12 12:19:24 +0800

barema
69 ● 1

I've tested the following:
* removing Apache Server (all requests are handled immediately by Tomcat ==> no effect
* modify code to use .invalidate() ==> no effect
* modify code to use Executions.createComponents() ==> no effect

All of these changes give no result: when I use the menubar to load a page into an include it works for the first request, all following requests give the same result: first the message "processing" appears, which disappears after 5 seconds or so ... and that's it.

I've turned on logging which gives the following interesting result

Oct 12, 2009 2:09:48 PM org.zkoss.zk.ui.http.WebManager getDesktop:314
FINE: Create desktop for /index.zul
Oct 12, 2009 2:09:48 PM org.zkoss.web.util.resource.ResourceLoader load:92
FINE: Loading C:\Tomcat 6.0\webapps\ingrid\index.zul
Oct 12, 2009 2:09:48 PM org.zkoss.xel.taglib.Taglibs getDefaultTLDs:292
FINE: Loading jar:file:/C:/Tomcat%206.0/webapps/ingrid/WEB-INF/lib/zk.jar!/metainfo/tld/config.xml
Oct 12, 2009 2:09:48 PM org.zkoss.xel.taglib.Taglibs getDefaultTLDs:292
FINE: Loading jar:file:/C:/Tomcat%206.0/webapps/ingrid/WEB-INF/lib/zul.jar!/metainfo/tld/config.xml
Oct 12, 2009 2:09:48 PM org.zkoss.xel.taglib.Taglibs getDefaultTLDs:292
FINE: Loading jar:file:/C:/Tomcat%206.0/webapps/ingrid/WEB-INF/lib/zweb.jar!/metainfo/tld/config.xml
Oct 12, 2009 2:09:48 PM org.zkoss.web.util.resource.ResourceLoader load:92
FINE: Loading C:\Tomcat 6.0\webapps\ingrid\menubar.zul
Oct 12, 2009 2:09:49 PM org.zkoss.web.util.resource.ResourceLoader load:92
FINE: Loading C:\Tomcat 6.0\webapps\ingrid\navigatiestructuur.zul
Oct 12, 2009 2:09:49 PM org.zkoss.web.util.resource.ResourceLoader load:92
FINE: Loading C:\Tomcat 6.0\webapps\ingrid\introductiescherm.zul
Oct 12, 2009 2:09:49 PM org.zkoss.util.resource.Locators myLocate:128
FINE: svl=/js/zk/html/lang/mesg.js base=/js/zk/html/lang/mesg ext=.js
Oct 12, 2009 2:09:49 PM org.zkoss.util.resource.Locators myLocate:128
FINE: svl=/js/zul/lang/msgzul.js base=/js/zul/lang/msgzul ext=.js
Oct 12, 2009 2:09:54 PM org.zkoss.web.util.resource.ResourceLoader load:92
FINE: Loading C:\Tomcat 6.0\webapps\ingrid\bedrijfsvoorstelling.zul
Oct 12, 2009 2:10:00 PM org.zkoss.zk.ui.impl.UiEngineImpl isReqDup0:876
FINE: Repeat request
sid: 1
user-agent: Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US) AppleWebKit/532.0 (KHTML, like Gecko) Chrome/3.0.195.25 Safari/532.0
content-length: 39
content-type: application/x-www-form-urlencoded;charset=UTF-8
ip: 81.82.211.49

What I did was the following:
1. load the basic page at http://www.360feedback.be/ingrid/
2. click on the menubar "onze organisatie" and select "bedrijfsvoorstelling" (the appropriate information appears)
3. click on the menuItem below ("onze organisatie" => "organigram") => "processing" appears ... but no result

The message in the logging "Repeat Request" appears once per click on another menuitem after a first succesful attempt.

Any ideas and/or suggestions ?

answered 2009-10-16 20:24:33 +0800

barema
69 ● 1

Stephan,

Thanks for your suggestions, but they don't help so far.
The point is that the request is not handled, since it is considered a duplicate request
"REPEAT REQUEST" is generated by org.zkoss.zk.ui.impl.UiEngineImpl (see code below).
If I understand it, this is because the request-id is recognized as one that has been used earlier.

The funny thing is, this doesn't happen when working on localhost, only when the page is called from another computer.

Any suggestions / similar experiences ?
Bart

Code snippet from
http://www.docjar.com/html/api/org/zkoss/zk/ui/impl/UiEngineImpl.java.html

701 public Collection execUpdate(Execution exec, List requests,
702 String pfReqId, AuWriter out) throws IOException {
703 if (requests == null)
704 throw new IllegalArgumentException();
705 assert D.OFF || ExecutionsCtrl.getCurrentCtrl() == null:
706 "Impossible to re-activate for update: old="+ExecutionsCtrl.getCurrentCtrl()+", new="+exec;
707
708 final UiVisualizer uv = doActivate(exec, true, false);
709 final Desktop desktop = exec.getDesktop();
710 final DesktopCtrl desktopCtrl = (DesktopCtrl)desktop;
711 final String sid = ((ExecutionCtrl)exec).getRequestId();
712 if (sid != null) {
713 final Collection resps = desktopCtrl.getLastResponse(sid);
714 if (resps != null) {
715 if (log.debugable()) {
716 final Object req = exec.getNativeRequest();
717 log.debug("Repeat request\n"+
718 (req instanceof ServletRequest ? Servlets.getDetail((ServletRequest)req):"sid: "+sid));
719 }
720 out.write(resps);
721 doDeactivate(exec); //deactive
722 return null; //done
723 }
724 }
725