"repeat request" => page is "processing" but returns no result <= request is considered duplicate

answered 2009-10-23 02:54:28 +0800

barema
69 ● 1

Hi,Jimmy

Thanks for your response, but I'm not sure if I'm getting it right.
Do you mean the response from the server is equal to the previous page (so no changes occur) ?
Or do you see anything more in firebug.

(I've used firebug before for css and html, but I'm not familiar with the use as script-debugger of how responses from the server can be intercepted)

Regards,
Bart

answered 2009-10-23 03:32:23 +0800

barema
69 ● 1

I have used tcpmon to intercept the requests that were sent to the server (which are considered to be the same by ZK after the first successful request).
This is what I did:
I've opened the first node on the left-side navigation tree, selected one of the items (successful), selected another (fail), selected another (fail)

Regards,
Bart

First request (handled, returned the expected result)

POST /ingrid/zkau HTTP/1.1
Host: localhost
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.0; nl; rv:1.9.1.3) Gecko/20090824 Firefox/3.5.3 (.NET CLR 3.5.30729)
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: nl,en-us;q=0.7,en;q=0.3
Accept-Encoding: gzip,deflate
Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7
Keep-Alive: 300
Connection: keep-alive
Content-Type: application/x-www-form-urlencoded;charset=UTF-8
ZK-SID: 1
Referer: http://localhost/ingrid/
Content-Length: 166
Cookie: JSESSIONID=06C0BEA362211C2D06F5AEB0E80F1B79; JSESSIONID=26385E4C4C6F8008C7DAEFACEAD26A2A
Pragma: no-cache
Cache-Control: no-cache

dtid=gkg2&cmd.0=onOpen&uuid.0=z_kg_33&data.0=true&cmd.1=onSelect&uuid.1=z_kg_v2&data.1=z_kg_73&data.1=z_kg_73&cmd.2=onClick&uuid.2=z_kg_93&data.2=46&data.2=14&data.2=

=====================================================

Second request (unhandled, shows "processing" for a few seconds and no other results. Log-debugging gives the message "repeat request")

POST /ingrid/zkau HTTP/1.1
Host: localhost
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.0; nl; rv:1.9.1.3) Gecko/20090824 Firefox/3.5.3 (.NET CLR 3.5.30729)
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: nl,en-us;q=0.7,en;q=0.3
Accept-Encoding: gzip,deflate
Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7
Keep-Alive: 300
Connection: keep-alive
Content-Type: application/x-www-form-urlencoded;charset=UTF-8
ZK-SID: 1
Referer: http://localhost/ingrid/
Content-Length: 126
Cookie: JSESSIONID=06C0BEA362211C2D06F5AEB0E80F1B79; JSESSIONID=26385E4C4C6F8008C7DAEFACEAD26A2A
Pragma: no-cache
Cache-Control: no-cache

dtid=gkg2&cmd.0=onSelect&uuid.0=z_kg_v2&data.0=z_kg_a3&data.0=z_kg_a3&cmd.1=onClick&uuid.1=z_kg_c3&data.1=35&data.1=10&data.1=GET /ingrid/zkau/web/zk/img/progress2.gif HTTP/1.1
Host: localhost
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.0; nl; rv:1.9.1.3) Gecko/20090824 Firefox/3.5.3 (.NET CLR 3.5.30729)
Accept: image/png,image/*;q=0.8,*/*;q=0.5
Accept-Language: nl,en-us;q=0.7,en;q=0.3
Accept-Encoding: gzip,deflate
Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7
Keep-Alive: 300
Connection: keep-alive
Referer: http://localhost/ingrid/zkau/web/zul/css/normmoz.css.dsp
Cookie: JSESSIONID=06C0BEA362211C2D06F5AEB0E80F1B79; JSESSIONID=26385E4C4C6F8008C7DAEFACEAD26A2A
If-Modified-Since: Fri, 23 Oct 2009 07:37:18 GMT

=====================================================

Third request (unhandled, shows "processing" for a few seconds and no other results. Log-debugging gives the message "repeat request")

POST /ingrid/zkau HTTP/1.1
Host: localhost
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.0; nl; rv:1.9.1.3) Gecko/20090824 Firefox/3.5.3 (.NET CLR 3.5.30729)
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: nl,en-us;q=0.7,en;q=0.3
Accept-Encoding: gzip,deflate
Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7
Keep-Alive: 300
Connection: keep-alive
Content-Type: application/x-www-form-urlencoded;charset=UTF-8
ZK-SID: 1
Referer: http://localhost/ingrid/
Content-Length: 125
Cookie: JSESSIONID=06C0BEA362211C2D06F5AEB0E80F1B79; JSESSIONID=26385E4C4C6F8008C7DAEFACEAD26A2A
Pragma: no-cache
Cache-Control: no-cache

dtid=gkg2&cmd.0=onSelect&uuid.0=z_kg_v2&data.0=z_kg_d3&data.0=z_kg_d3&cmd.1=onClick&uuid.1=z_kg_f3&data.1=85&data.1=9&data.1=

answered 2009-10-23 09:44:18 +0800

barema
69 ● 1

Dear Stephan (and all others out there),

I've set up the following simplified page (unlike previous version) with access to all .zul sources
http://www.360feedback.be/ingrid/demo.zul

essential pages (that can be downloaded from this page) are:
* demo.zul (main container page)
* leftnavigation.zul
* intro.zul (default centerscreen include)
* page1.zul (alternative centerscreen include)
* page2.zul (alternative centerscreen include)
* page3.zul (alternative centerscreen include)

this page illustrates the problem and provides access to all the source code-files.
There may be a problem however opening all the different files (due to the problem I'm trying to fix here :-), but there is an easy workaround: reload the page.

I just hope someone sees the obvious easy fix for this issue.

Thanks for the help so far!

Regards,
Bart

answered 2009-11-10 09:55:20 +0800

barema
69 ● 1

Dear Terrytornado,

I've modified my pages to include the id attribute => no difference.
Using Executions.createComponents(...) doesn't give any difference either:

zk doesn't even get this far: as soon as the request reaches the server, before it is treated, it is judged to be equal to the previous request and thus the server thinks it's a duplicate request => it remains unhandled.

Any ideas ? (see the output "repeat request")

answered 2009-11-10 10:22:22 +0800

barema
69 ● 1

Just to make sure the problem MUST be a server related thing:
I've uploaded the example from http://www.zkoss.org/smalltalks/netbeans2/netbeans2.dsp as some extra pages on my site, accessible via

http://www.360feedback.be/ingrid/mytabboxdemo.zul

this page includes the demo-app as discussed in the zk small talks and gives the exact same problem as the one in my own app: only the first request is processed, all subsequent requests remain unhandled.
can this be an configuration problem due to Tomcat+Apache setup and the way remote requests are being handled ???

answered 2009-11-10 18:34:11 +0800

barema
69 ● 1

If you would load the OnDemand2 Tab before you load the OnDemand1 Tab, you would not be able to see the OnDemand1 Tab ...
I've updated to 3.6.3, the web.xml and zk.xml are the default ones suggested in the quickstart-guide. (empty zk.xml)