Waiting in WDA

Hello Friends,
I am developing a WDA application wherein I need to perform and RFC call to check some information on other system.
If that information is not yet updated on the remote system. I have to wait for sometime and then again call RFC. So this action will be performed till the time I get that information.
I tried using Wait statement in Class method which I am calling from my WDA this gives dump.
So I tried Function module ENQUE_SLEEP with 42 seconds waiting time each time.
If I execute my application in debug mode ( Even if I go to debug atleast once) . It is being executed successfully.
BUT if I directly execute it ,it gives below error on page after 1 min and few seconds.
Error start*******
The page cannot be displayed
There is a problem with the page you are trying to reach and it cannot be displayed.
Please try the following:
Open the Server path home page, and then look for links to the information you want.
Click the Refresh button, or try again later.
Click Search to look for information on the Internet.
You can also see a list of related sites.
HTTP 500 - Internal server error
Internet Explorer
Error End*******
Same thing happens if I try do 100 times.. to make system wait.
Thanks in advance for your help!
Regards,
Hema

Well its appears that the HTTP session breaks when you use the SLEEP or WAIT command,
below excerpt is from thomas jung on a similar query
the fundamentals of how web applications work. They are a request/response model.
The frontent (your browser) makes a request to the server. ABAP code is executed on the
server which produces an HTTP response. Only after all code is finished being executed,
is there a response sent back to the client.
webdynpro ABAP is an statefull paradigm. would its be possible to restructure your application so that your RFC call executes as different BACKGROUND process. which should notify you application by writing data to some database table. Then you WebDynpro application can check this table for completion of task & results.
if you HAVE to wait for result from RFC & u cant do anything else except wait u might use ,TimeTriggered UI element can be usefull to keep client request alive,
Greetings
Prashant

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2) DVR records a full 1 hour show however, after 20 or so minuets of playback, use of the fast forward, skip (to get around a commercial) or pause DVR functions will cause the playback to jump to the end and you can't see the rest of the story. One must start the show over again, view stuff you have seen before to get to where the error happen. If you fast forward too close to the point of the error, you will get dumped out of the show all over again. Once you get close you just have to watch commercials and what you have seen before and then not use any DVR functions in order to watch the rest of the show.
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All seemed to be well with the unit for a few months and the upgrade to the new 1.9 software looked like it went off without a hitch.
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1/6/12 Aaron Phelps, Cable Splicing Technician comes to look at the problem. Nice guy! I show him the two recorded shows that have the problem. He can't get the on-screen diagnostic up but we use the test via the Main Menu and all readings seem OK. He also tests signals via an external meter with good results.
At last, he calls Tier 2 Tech support and I'm told by him that it seems some bug is in ver 1.9 and we will have to wait a month for a 1.9.1 to come out that should address a memory issue in the DVR. I don't know is this is the real story but Aaron tells me the ONLY fix they have is to swap out STB and he has no other 7232 units so... I'd have to go back to a smaller hard-drive or wait a month to see what happens.
To say again, it is a problem when the only answer in practice is to reboot the STB or replace it and this does not solve the problem. The field Techs don't know about a software bug less they call tier 2 support. Also, as it is so common to just replace the STB, the process may take only a moment in physical action to swap wires HOWEVER, it is an afternoon to get programming done so a new DVR is recording all the shows a Customer has established; on top of the time talking to phone Tech support and waiting for someone to show up to the home, that is a considerable investment in Consumer time. If you can't back up the content with the local drive due to copyright issues how about a cloud approach? I'd encourage a known bug to be resolved quickly and perhaps solve the manor that a STB is backed-up and replaced.
I learn on 1/6/12 my friend had like problems:
xxxxxx address blocked
Claire had the added problem that a pre set event she set to record change by an hour. I've not seen this but, I see in the Forum URL below, another person had the same problem as reported by "DC-Videophile" on 01-01-12 at 08:33 PM. On this same forum "rich3fan" reports problems that I have on 01-04-12 11:54 AM. The very bad news would seem from "markjrenna" 01-04-12 09:29 PM where it is suggested that 1.9.1 will not be out before 1Q12!!!! That is a long time to have this problem.
http://www.avsforum.com/avs-vb/showthread.php?p=21441579#post21441579
A Review of My Events W/ Problems:
I did not record when the problems happen in December
NCIS, channel 50, "Dog Tags" USA Recorded 1/5/2012 2:00 PM
NCIS, Los Angeles; 50, USA Recorded 1/4/2012 7:00 PM
NCIS, channel 50, "In the Zone" USA Recorded 1/6/2012 6:00 PM (after Tech visit to home)
I notice with this event, when you hit fast forward, the progress bar moves forward with time then at a point it goes back to the start point, even when good video is playing in fast forward. This program worked beyond 22 min then failed at maybe 38 min. When I tried again, it failed at another point earlier (maybe 15 min) so it does not have a pattern.
Leverage, channel 51, TNT, "The Gold Club" Recorded 1/7/2012 2:00 AM (after Tech visit to home)
The Best Thing I Ever Ate, channel 164 Food Network, "Bang for the Buck" Recorded 1/6/2012 7:30 PM
My Name Is Earl, channel 52 TBS, "Stole P's HD Cart", Recorded 1/7/2012 8:00 AM (after Tech visited to home)
NCIS, channel 50 USA,"Internal Affairs" Recorded 1/6/2012 5:00 PM (after Tech visit to home)
NCIS, channel 50 USA, "UnSEALed" Recorded 1/8/2012 11:00 AM (after Tech visit to home)
and a lot more.........

I am having the same problems. My guess is that a lot of people are having the same problems and just living with it. Those of us who know where to go on the Internet come here to find a fix.
It seems Verizon has some explaining to do. Maybe they should try Beta testing new software a little better. I would rather have to wait longer for something that works. I am sure that some manager or director said this is close enough, deploy it and we will see what happens. Well, you are seeing the problems. Time to fix your mistake.
All of us are telling our friends about the problems. The longer this goes on, the more people we will tell about it.
Wouldn't you rather us be telling our friends that their is an error in the new interface and that you are working hard to fix it?
If you want to be up front about this, then just tell us. We are adults and can handle it. If you made a mistake, own up to it and give us some credit for doing your Beta testing in the field.
Customer Service is all about telling the truth and if you made a mistake, admit it and lets move on with a fix. I do not want to be told again that I should be able to unplug it, power cycle it, try the on-board diagnostics, etc., etc.......
I am going to be repsonding on a daily basis to keep this topic at the top of the list.
Time to come clean. You will feel better Verizon.
Let's talk tomorrow.

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