Invalidating rfc metadata cache

hi all,
i want to invalidate rfc metada cache through adaptive rfc metada cache invalidation tool in webdynpro console..
can any one plz suggest me the path to find that.
thanks in advane
seshagiri

hi juan,
it was very helpful solution to our problem that is invalidating rfc metadata.
after i gone through the pdf,i found it is for NW04S or 7.0 SP12
but v r using SP09
so i beleive upgraing is the only solution.right
or can u suggest any other solution.
thanks in advance
seshagiri

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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.
This is contrary to what SAP has publicized, so is there a process in NWA or a single process (and NOT the server0 process) that we can refresh without stopping and starting the java engine.
Much like Visual Administration is there a single service we can stop and start to ensure the engine stays up and running and available?
Thanks
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
There's a solution in this guide which explains how to proceed to avoid engine restart in case of ARFC.
(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

J2EE RFC Metadata cache refresh

Hi All,
I've searched a bit on this forum but can't quite find the answer I'm looking for...
Is it possible to perform a cache refresh without having to restart the server, after making changes to an RFC model and deploying it? It's a pain in the neck to have to keep restarting DEV, QA and PROD everytime we move something through the CMS that has changes to models.
I would have thought the assembly step from consolidation to production would have solved this problem but it doesn't.
Thanks,
Gareth.

> Hi Gareth,
> Several stacks like Web Dynpro, Metadata Interface,
> e, JCO etc read the ABAP metadata and cache it on the
> J2EE Engine. Hence the older metadata still remains
> cached.
> Solution:
> 1) If the interface of a function module is changed
> on the ABAP side, the restart of the J2EE application
> server updates the meta data caches on Java side. A
> restart of the ABAP application server is not
> necessary.
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> 2) People think about a option to update the meta
> data cache without a restart of the J2EE application
> server. But nothing in detail is planned at the
> moment.
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> Regards,
> Arun
Hi Arun,
I understand what is happening and how it works and why... I was simply asking if there is a way to refresh the J2EE cache without restarting the server?
I think this is something we really need included in future SP's as it is a pain. As mentioned, I would have throught the assembly/import step in the NWDI CMS would have done something to refresh the cache when an SC is imported into the Production system.
Gareth.

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
Regards'
vino

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... metadata cache.

Just curious...Is there a way to force a re cache of the RFC metadata.
Regards
Pran

Hi Pran,
currently, the only way to "recache" or initialize the Metadata cache is by restarting the Netweaver J2EE Engine.
As a matter of fact, whenever (structural) changes are done in a backend (such as adding fields to DDIC Structures), then the engine must be restarted. It is not necessary to reimport, rebuild, or redeploy, but it is necessary to restart
This will be improved in future releases.
Ciao, Markus

Invalidate the Adaptive RFC Dictionary Cache

Hi All,
I had to do RFC interface structure changes for a Webdynpro JAVA application.I had deployed the application and used the administrative function "Invalidate Adaptive RFC Dictionary Cache" within the Web Dynpro console" to explicitly invalidate the metadata cache..
Before using this tool, I was not able to run the application.This tool helped to run the application.
But When I Submit the data to the RFC from this application I get the following Exception:
com.sap.mw.jco.JCO$MetaData.getType(JCO.java:10210)
I understand from the SAP note 859950, Metadata is not invalidated without J2EE Engine restart.
Is there any update from SAP after this note..Pls let me know if some one has done a workaround instead of restarting the SAP NW Application server.
Thanks, Sethu

We went through this same issue many times and we opened an issue with SAP a few months ago.
The invalidate is very limited and does not handle a clustered server architecture. It is meant only for a single node, single server setup. All of our environments are multi-node and multi-server.
The tool will only invalidate the node that the Basis Administrator is currently logged onto. Therefore if your server architecture consists of > 1 node and/or > 1 servers then you will have nodes/servers that still have the previous version of the metadata cached.
SAP said the Basis administrator would have to log onto each node and run the invalidate tool. In a multi-node setup there is no easy way to do this because there is no control which node you will be put on. If you have 1 node per server then yes you can log onto each server and run the tool.
In the end SAP said they do not support the Invalidate tool in a multi-node/multi-server cluster.
They said to perform a J2EE restart, period.
Hope that helps.
Dean Cyril Wood

Invalidate ARFC Metadata Cache

Hi,
I am working on NW 7.0 S 12.
Everytime I make changes to my Adaptive RFC I require to take a J2EE server restart to invalidate the metadata cache. I am aware of the 'Invalidation of ARFC Metadata Cache link under Web Dynpro Console on the Porta
I am unable to find this link under Web Dynpro Console -> Admin Menu.
I found the document [Metadata Cache Invalidation for Adaptive RFC Models|http://www.sdn.sap.com/irj/scn/index?rid=/library/uuid/10465350-b4f5-2910-61ba-a58282b3b6df]
on SDN by Arun Bhat J which says I can download EARs from SDN for NW7.0 and deploy as a Web Dynpro application.
I have tried this activity by importing the file structure in NWDS as a Web Dynpro Application/ J2EE Application/ Java Application. None of these helped me deploy file structure.
I would like to make this link of 'Invalidation of Cache' available on the portal. How can I achieve this. Also, I have downloaded the files mentioned in the document. How can I use this to solve my problem.
Thanks in advance.

Leo van Hengel wrote:
> However my real advice would be to patch your portal. SP12 (2007) is really old
>
> Cheers,
> Leo
We have the same problem in CE7.2.
Everytime when we change structure in ABAP or in WS - we have to restart CE
cliaring JCO Cache in nwa "JCO monitoring" helps 50/50...
Edited by: Pavel Korgenevskiy on Feb 3, 2012 6:01 AM

Clear Metadata Cache

I had an error that I have listed below and had to clear the metadata cache to fix it. I do not have the metadata cache activated under user option so I am not sure why I had to clear the cache to get things working. Can someone explain why I had to do this and where the metadata cache is located?
Error:
Index was out of range. Must be non-negative and less than the size of
the collection.
Parameter name: startindex

Hello Jeroen,
There is no other possibility. If you adjusted and reimported a RFC model, you need to restart the J2EE server.
Regards,
Christophe

Logical systems for modeldata and RFC metadata

Hi All,
I want to know how I can display the my own created logical system names under the drop-down menu when i have to select the logical system names for modeldata and rfc metadata. I don't want to them to be written instead i want them to be one of the options in the drop down menu, as we have them in the FLIGHT_LIST_INIT example found in the sample applications and examples.
Thanks in advance
Srikant

Hi,
While creating SLD for your R/3 systems give the desired name of wht u want instead of logical name.
For configuring the same refer the link below :-
http://help.sap.com/saphelp_erp2004/helpdata/en/29/e0b75c2b7d40c5bfbda82e905b701c/frameset.htm
Regards,
guru

RFC metadata & model instance

Hi,
Could you explain why do we require RFC metadata & model instance in WD adaptive RFC model? What is purpose of these?
Krishna.

hi
Rfc metadata and modeldata logical system destnations to connect to backend systems used in configuration of JCOs .
we configure JCOs in ContentAdmin.
Meta data is the Dictionary data thats why you find Metadata destination in Dictionaries of your project.
Modeldata is the Application data,you can find logical system name of Modeldata in Properties of your Modelclass.
So Model data destination will fetch actual data while metadata destination will contain description of the data.
Regards
sowmya.

Gateway OData Metadata Cache

Hello,
we're just about planning for our new OData Service. As we have a scenario where we generate structures to be used in our OData services we cannot make sure that the structures in the different clients are idetical as we will have additional customizing for this. In our use case that would mean that depending in which client the OData service is called the meta data could also be different. Entities and Entity Sets will be exactly the same as I use the same OData Service.
When I was testing the caching meachanism I got also confused with browser cache and the backend cache. Maybe you also made your experience and can provide me more details if I call the same service in different clients if we always access the same meta data...???
The informatio I got in SAP Help does not say anything regarding this:
Metadata Cache - SAP NetWeaver Gateway - SAP Library
Thanks & Regards Marco

What I feel that you can not have different metadata for the same service in different client.
At runtime you can not change the metadata based on different clients. OData is a kind of extension on top of Atom Pub and Atom, with the additional feature of data description which is metadata in this case.
In Gateway Cache can be addressed/affected by ...
1. You can clear the cache in Gateway HUB using transaction /IWFND/CACHE_CLEANUP
2.You can clear the cache in Backend using transaction /IWBEP/CACHE_CLEANUP
3. You can deactivate caching from SPRO -->Gateway -->OData Channel -->Administration -->Cache Setting -> Metadata .. Also you will find some more options for Cache here
4. Moreover Cache is one of the constraints of REST design which says something like
Cache constraints require that the data within a response to a request be implicitly or explicitly labeled as cacheable or non-cacheable. If a response is cacheable, then a client cache is given the right to reuse that response data for later, equivalent requests.
Now you can set no cache for the data (response) using following code in your DPC_EXT
* Prevent persistent caching on client
DATA: ls_header TYPE ihttpnvp.
ls_header-name = 'Cache-Control' ##NO_TEXT.
ls_header-value = 'no-cache, no-store' ##NO_TEXT.
set_header( ls_header ). //Or suitable method from DPC_EXT
ls_header-name = 'Pragma' ##NO_TEXT.
ls_header-value = 'no-cache' ##NO_TEXT.
set_header( ls_header ). //Or suitable method from DPC_EXT
Regards,
Atanu

WHAT IS MEANT RFC METADATA?

Hi
What is meant by RFC METADATA?
BR
SAGAR

Hi Sagar,
Please google or search SCN before you ask this type of question. The answers are online.
How to use SCN search
Regards,
Jannus Botha

Invalidating the MDX Cache

Dear all,
We are observing that even if we delete entries in the query cache, queries coming from BOBJ don't fire the corresponding SQL in the BW DB. We want to investigate now the content of the MDX cache, but so far we were not able to find a TX or similiar to manipulate (invalidate, current content, etc).
Any ideas ?
Kind regards, Philipp

Hi Philipp,
Can you share some information on the transaction you used for validating/invalidating the MDX Cache?
It will be very helpful. I couldn't find any info on this.
Thanks in advance.

Invalidating rfc metadata cache

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