Deployment: Metadata Cache Invalidation for Adaptive RFC Models

Dear SDN Member,
I have deployed the new "Cache Invalidation" Tool at our portal NW04s SPS12.
We have deployed the tool by using the sdm.
https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/10465350-b4f5-2910-61ba-a58282b3b6df
The entrypoint is not visible in the webdynpro console navigation.
What have I done wrong?
Best regards,
Olaf Reiss

Hello,
we also deployed it to our NW04s SPS12 Portal (since it was NOT included in SPS12)
We deplyoed the correct version. For us it is also not visible in the NWA.
However, it can be called from the Webdynpro console. Then you see it has this direct link.
http://<server>:<port>/webdynpro/dispatcher/local/InvalidationTool/Invalidation
However, the thing still has bugs.
Clicking the button "Get JCO destinations" just crashes with a 500 error (see below). Our developer said
The initial exception that caused the request to fail, was:
 java.lang.NoSuchFieldError: flush_cache
 at com.sap.invalidation.InvalidationView.onActionGetSLDJCOs(InvalidationView.java:215)
 at com.sap.invalidation.wdp.InternalInvalidationView.wdInvokeEventHandler(InternalInvalidationView.java:236)
 at com.sap.tc.webdynpro.progmodel.generation.DelegatingView.invokeEventHandler(DelegatingView.java:87)
 at com.sap.tc.webdynpro.progmodel.controller.Action.fire(Action.java:67)
 at com.sap.tc.webdynpro.clientserver.window.WindowPhaseModel.doHandleActionEvent(WindowPhaseModel.java:420)
 ... 26 more
Using the lower part and option 2.
("Dictionaries Cache Invalidation" and "Enter Dictionary") is said to be working, if you exactly know the naming.
But how can we invalidate the RFC caches used by Visual Composer?
In Visual Admin/services/Connector Container/../SapFactory/Managed conenction factory/ConnectionDefintion I have already set the Connectionlifetime to 60 and ticked "expiraation" ?
Best regards
Ulf

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Metadata Cache Invalidation for Adaptive RFC Models

Hi,
Im trying the tutorial of the document: Metadata Cache Invalidation for Adaptive RFC Models.
Ive downloaded and deployed the EAR for NW7.0 on my server, but when I try to list the JCO destinations I have the following error:
java.lang.NoSuchFieldError: flush_cache
at com.sap.invalidation.InvalidationView.onActionGetSLDJCOs(InvalidationView.java:215)
When I try to invalidate a dictionary, I have the message:
Cache for Dictionary com.unilog.product.search.model.types.SearchProductModel invalidated
But the tooltip value is not updated in my application...
Can anyone give me some tips to use this component?
Thanks in advance.
Regards,
Claire

hi friends
u see this weblogs&pdf,this is helpful for u
/people/bertram.ganz/blog/2007/01/08/the-top-12-hottest-sap-notes-every-web-dynpro-java-developer-must-know
https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/docs/library/uuid/f3f93ee7-0c01-0010-2593-d7c28b5377c2
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vino

Changing the default logical system names for adaptive RFC models

Hello,
When I create an Adaptive RFC model the dialog that asks me to specify the model name, package, source folder, etc. has default values in the "Default logical system name for model instances" and "... RFC metadata".
I know I can type in another name there but I'd like to change the default name to something that fits our naming conventions. Can I change that? If so, can someone tell me where?
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David.

Suresh,
Thank you for your response. However, that is not what I was looking for. Sorry if my post was not clear.
I knew that I could change it AFTER the import. I also know that I can type in something else besides the default DURING the import.
What I am asking is if there is a way to change some configuration setting so that the 'default' that comes up in the drop down DURING the import is something different than what comes 'out-of-the-box' with NWDS.
Hope that clears up what I'm looking for.
David.
Message was edited by:
David Z. Pantich

Why SLD for Adaptive RFC Model?

Hi,
Is it necessary to configure the settings in SLD in order to run an adaptive RFC Model or does one have alternatives?
Because, while defining an adaptive RFC Model in NW-Dev-Studio, one does explicitly enter the SAP Log on information.
Regards
Meesum

Hi,
SLD is required to run the RFC application.
At design time there is no dependency on SLD and we are not going to specify SLD details during the model import.
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Regards, VIP

WD Java RFC metadata cache invalidation without recycle JAVA

Since we are in a high availability production system, we cannot recycle or CE instance. There are times were the RFC metdata invalidation does not work and the only things that forces it is a recycle of the CE system.
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Much like Visual Administration is there a single service we can stop and start to ensure the engine stays up and running and available?
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Weyland Yutani

Hi Weyland ,
did you check the guide ?
Metadata Cache Invalidation for Adaptive RFC Models
http://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/10465350-b4f5-2910-61ba-a58282b3b6df
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(I don't know your engine release, but if it is >= 711, then you may welcome this guide as well:
Using an Adaptive RFC 2 Model in Web Dynpro Java
http://www.sdn.sap.com/irj/scn/index?rid=/library/uuid/50f7192d-2808-2d10-189b-df3fa5f71abf )
I hope this helps.
Best Regards,
Ervin

How to install the metadata cache invalidation tool

Hi,
I have a problem in using JCO destinations for Adaptive RFC models.
I went through the below pdf and they mentioned metadata cahce invalidation tool and it is not installed in the portal
https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/10465350-b4f5-2910-61ba-a58282b3b6df
please let me know how to install metadata cache invalidation tool
points will be rewarded for sure for the helpful answers

I installed the Meta data cache invalidation tool using SDM and when i am trying to run that application from Content administrator it is throwing an exception
The currently executed application, or one of the components it depends on, has been compiled against class file versions that are different from the ones that are available at runtime.
If the exception message indicates, that the modified class is part of the Web Dynpro Runtime (package com.sap.tc.webdynpro.) then the running Web Dynpro Runtime is of a version that is not compatible with the Web Dynpro Designtime (Developer Studio or Component Build Server) which has been used to build + compile the application.*
Note: the above hints are only a guess. They are automatically derived from the exception that occurred and therefore can't be guaranteed to address the original problem in all cases.
please let me know how to resolve this issue
Points will be awarded for sure
Bala

How to install metadata cache invalidation tool

Hi,
I have a problem in using JCO destinations for Adaptive RFC models.
I went through the below pdf and they mentioned metadata cahce invalidation tool and it is not installed in the portal
https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/10465350-b4f5-2910-61ba-a58282b3b6df
please let me know how to install metadata cache invalidation tool
points will be rewarded for sure for the helpful answers

This tool is already installed on your system.
1) navigate to http://<hostname>:<port>/index.html
2) Click on "Webdynpro"
3) Click on "Web Dynpro Console"
3) Login as an Administrator (any user with admin priv's is ok).
4) Notice the last entry in the list

Adaptive RFC Model - disconnectIfAlive()

Hi,
In my Web Dynpro application, I am using Adaptive RFC model and executing the RFC as below
ZRfc_Test_Input input = new ZRfc_Test_Input();
// set input
input.setParam1("xxx");
input.setParam2("xxx");
input.execute();
My application works fine for couple of days and suddenly I get an error that
"com.sap.tc.webdynpro.modelimpl.dynamicrfc.WDDynamicRFCExecuteException:Could not create JCOClientConnection for logical System: WD_TEST_MODELDATA_DEST - Model: class com.test.TestModel. Please assure that you have configured the RFC connections and/or logical system name properly for this model!"
Our basis guys are unable to figure out why the SLD is misbehaving suddenly. If we restart the SLD, everything will be fine for next couple of days.
I just want to make sure that it is not happening due to my application or due to the way the RFCs are being executed.
After I execute my model, do I have to explicity disconnect the connection using below statement?
input.modelInstance().disconnectIfAlive();
Do I have to do this even when I am using Adaptive RFC model?
Default min and max number of connections are used while creating JCO destinations.
Appreciate your input.
Thanks
Kumar

Hi Siva,
>>> It is always better to close the connection after executing the RFC<<<
Thanks for the response. I am sorry for being adamant, I agree that it would be nice to disconnect but IS IT MANDATORY? If the pool size is increased appropriately, doesn't web dynpro runtime takecare and disconnect the connections after the execution.
In SAP tutorials and help.sap.com (at least the ones I have gone through), it is never mentioned any where that one MUST close the connections EXPLICITLY after the execution. All these days I am under the impression that it is not needed for Adaptive RFC models. I may be wrong.
Could you please confirm if we should close the connections explicity?
Thanks
Kumar

Problem in displaying a field in webdynpro using Adaptive RFC model

HI,
I created a webdynpro application using adaptive RFC model and i have a problem in displaying one of the output fields.
When i execute the function module it is giving the exact value for my output field in this case telephone number (of type STEXT which is char with length 40).But when i am trying to display that telephone number in webdynpro application it is taking only first 4 digits.
i deleted the model and recreated it still it doesnot work.
please let me know how to resolve it.
points will be awarded for sure
Bala

Hi Bala,
Whenever you reimport the model server restart is necessary otherwise the changes will not get reflected. You will get an error when you deploy the application.There is no go around except restarting the server as the meta data gets cached in the server as long as the server is runnig.So, Once you restart the server the cache will be cleared.
Check once again whether you are fetching data from correct BAPI field. Still problem persist try debugging.
Regards, Suresh KB

Error in Import Adaptive RFC Model

Hi SDN,
I am trying to develop an application using Import Adaptive RFC Model, while creating a model i could not able to connect to the backend system after giving the single server parameters. When i click on the next button a pop up is displayed with an error message *"User Name or Password wrong" *.
But i could able to login to R/3 with the same userid and password from SAP logon pad.
Really i am at Six and Seven's to trace out this error. Please suggest me how to overcome this error and create the model succesfully.
Regards
Basha

Hi Praveen & Chaitanya
Thanks for your quick response and informative threads.
Actually in order to import an adaptive rfc model
I have right clicked the model node to create a model and given the model name,package name,model data and metadata names and clicked next button. Then in the next screen
Tab Strip -> Single Server:
Host name :
System Number :
client details:
Tab Strip -> Load balancing:
System :
Message Server:
System Name:
Group:
(in Tcode: SLMG i have added the group public also)
client details:
After entering the required details either in Single Server or Load balancing and clicked the next button I could not able estabilish a connection to the backend R/3 and get the list of Bapi's or RFc's. Instead i am getting a pop up message "User Name or Password Wrong". I could not able to proceed from here.
But with the same above parameters i could able to logon to R/3 from SAP Logon Pad. I have tried by giving the user name in Cap's and small letters but no use.
As i was strucked at the intial step while creating the model but not during the execution of the program, as far as my knowledge is concerned i think we no need to worry on SLD or JCO connections during the creation of the model. Please correct me if i am wrong and suggest me to rectify the error.
Regards
Basha

Reimporting of Adaptive RFC model

Hi all, I have added two fields in the BAPI and i have reimported the Adaptive RFC model in Web Dynpro.
After running the application and accessing the new fields, i am getting this exception.
java.lang.ArrayIndexOutOfBoundsException
at com.sap.mw.jco.JCO$MetaData.getType(JCO.java:10161)
What could be the reason?

Hi,
As the error states MetaData.getType it seems that the new changes are not yet reflected in the J2EE server. You need to restart your engine once. You can search this forum for a workaround by Valery which doesnot need a restart.
Regards
Ayyapparaj

Creating Adaptive RFC model without logon name and pwd?

Hi All,
I have this requirement where when I log on to an application I need to get a mapped user name and pwd from EP and then connect to the R/3 system.
However, you cannot create a Adaptive RFC model without username and password. So i needed to know if this can be done in some other way.
Thanks,
Malita

hi
To my understading , you need user and pwd created for your portal and call the RFC or Bapi .
Hope this is possible .
Creating the users and pwd for the portal for your application is possible , but parallelly
calling the RFC with same user name and pwd i hope its not , as you have to deploy the application
which created the userid and pwd , then call the RFC ,
and for more you can provide more information what exactly is your requirement .

Using an Adaptive RFC Model from JSP

I'm trying to use an Adaptive RFC Model I created for use in our Web Dynpros from a Portal Application project. I've created 2 DCs:
1. A Web Dynpro DC, only containing the imported Adaptive RFC Model. The model has been added to the public parts.
2. A Portal Application DC, with the model DC added as a DC usage (along with the other required DCs)
Now, everything appears to work from inside NWDS. The dot operator works while editing my JSPDynPage class, and everything builds fine, but when I deploy and test in the portal, I get "package not found" errors on the actual JSP. I assume this is because the JSP is compiled at run-time. How do I expose these classes to the JSP compiler?
It's seems like using the same method to call BAPIs in Web Dynpros and Java iViews would be a good practice following SAP's "reusable code" policy, so there must be a way to do it...

Jonathan,
Adaptive RFC Model works correctly only when running inside WebDynpro container. JSP runs outside container (in regular J2EE WebApplication container).
The error you receive is due to missing run-time references to container classes.
Actually, what you are trying to do is dead end, sorry.
Use SAP Enterprise Connector instead of Adaptive RFC model. Generated connector classes works from any environment. Also they are sooo similar to Adaptive RFC that you'll even not mention a difference.
Valery Silaev
EPAM Systems
http://www.NetWeaverTeam.com

JUnit for Adaptive RFC

Hi all,
I want to provide junit tests for our adaptive rfc models. However the simple approach to it doesn't work, as the model needs some backend information to execute (namely JCo connections, which are maintained on J2EE, not within NWDS).
Do you know how to execute aRFC model directly in NWDS within the JUnit test, without WD controllers, and without J2EE?
Is that possible at all?
Thanks, Tom

Hi.
Some insight to the WDTypeNotFound Exception
The error only occured because I wasn't connected properly to the SAP system via JCO. I verified this by taking a different FM available in a live system (where loadbalancing is used). Because the metadata JCO was properly configured to the MSG server (not the workaround I mentioned above), the exception did not occur.
So the only question that remains is how to connect to the msg.server of a development machine where load balancing isn't set up. the port should be 36XX, where XX = system number, but what about the GROUP? At least for me the default "PUBLIC" didn't work. SID??
Cheers,
faB

Error while creating a Adaptive RFC Model

Hi all,
I am trying to create a Model using a Adaptive RFC Model, I assign a Model name and the logical system names, enter the details in SAP Logon Information for the Single server,here it gives me a Gateway error. What could be the issue here?
NB: In the Host Name , I tried with both the Host name of the r/3 server and also with the SAProuter string ( as we have the server at other place) ,still it doesnt work. and I am able to login to the R/3 system from the SAPLogon GUI from my desktop normally.
Is there any issue of the firewall related to this, if so whats the port number that should be opened so that i can connect to the r/3 system get the list of BAPIs present there into my Webdynpro application .
Need help on this
Regards,
Vijay

Hi Lohi n Gopi ,
I have checked out with the your given suggestion of trying with the host name as well as IP address and also typing all the details,without copy pasting the details . In both the cases it gave the " Connect to gateway failed " error mesg.
But one intersting thing here that i observered when trying with hostname, IP address, or SAProuter string is as follows .
with IP address
Connect to SAP gateway failed
Connect_PM GWHOST="ipaddress",GWSERV=sapgw10,ASHOST="ipaddress",SYSNR=10
LOCATION CPIC(TCP/IP) on local host
ERROR patner not reached(host "ipaddress",service=3310)
with SAProuterString
Connect to SAP gateway failed
Connect_PM GWHOST="SAProuterString",GWSERV=sapgw10,ASHOST="SAProuterString",SYSNR=10
LOCATION SAPRouter on " some HostName"
ERROR hostname unknown
with HostName
Connect to SAP gateway failed
Connect_PM GWHOST="hostname",GWSERV=sapgw10,ASHOST="hostname",SYSNR=10
LOCATION CPIC(TCP/IP) on local host
ERROR hostname "hostname " unknown
Is there any firewall port blocking issue here ?if so , whats the port that needs to be opened ?
Appreciate your help.
Thnks,
NR

Deployment: Metadata Cache Invalidation for Adaptive RFC Models

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