JCo connection and SLD

Greetings, we have a federated portal which is using JCo connections as part of the MSS/ESS business package. We had a situation where the SLD was down therefore the JCo connections were down. Our question is JCo connection completely dependent on SLD. In other words if SLD is down, will that mean our JCo connection will fail thus an outage.
If this is the case what is the best way to make sure SLD is highly available? Our options are to make SLD highly available or distribute SLD on each system.
Also, what is the performance hit on making SLD distributed on all Portal system if this the route we go?
Thanks in advance!

Hi,
The distributed SLD servers can cause higher administration expense with regard to consistent data. Therefore, we recommend that you consider to use a single SLD server first.
but for large system landscapes that are distributed over different geographic locations, a single SLD server might slow down the performance of involved application systems. In this case, a distributed SLDserver installation can be taken into account.
Samrat

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ESS - JCO Connection and Performance

Hi Forum,
In ESS Package Applications we are not using Applications related to Travel Management and Finance but JCO connections are created for the respective application namely
1. SAP_R3_Travel & SAP_R3_Travel_MetaData
2. SAP_R3_Financials & SAP_R3_Financials_MetaData
I need to know performance impact of these JCO creations which we are not using anyway.
Many Thanks and Regards
Sudhir

Thank you Bala,
Will there be any performance impact - If I disable these unused JCO connection. Basically I need to know creating a JCO connection and keeping it idle - how much memory/pool etc it is going to consume. If it is going to impact then the plan is to identify all unused JCO connection in the complete system and disable it.
Regards
Sudhir

JCO Connection and Changing Parameters

Hi,
I am trying to retrive the content populated in changing parameter using the following code
                 JCoTable titles = function.getChangingParameterList()
                                              .getTable("TITLE_HELP");
                                  numEntries = titles.getNumRows();
I always get numEntries = 0 in one of the application server, but when the same application is deployed on the different server It is returning the number of entries correctly.
Do i need to maintian any configurations on the application server.
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Regards,
Chandrashekar.

hi,
In the J2EE Engine the RFC functions are implemented by the JCo RFC Provider service, which is used for processing ABAP to Java requests. A feature is provided for receiving calls from the SAP systems this is done by registering the J2EE Engine as a RFC destination.
The JCo RFC Provider Service processes calls from the SAP systems. It dispatches the calls to a stateless session bean, which is registered in the J2EE Engine naming system. By naming convention the JNDI name used is identical to the name of the SAP function module.
cheers,
jo

Unable to create the JCO connections in webdypro (JAVA) No SLD Connection

HI All,
In webdynpro i am unable to create standard JCo connections. create Jco connections and Maintain Jco COnnections are disabled. when i click any of the standard content of the Jco connections it displays error message No sld check. But SLD is running fine. I have checked in Visual Admin there also SLD supplier is running fine.
But i am unable to create or maintain the Standard content of the JCo Destinations.
Thank You,
Mahesh C

Hi ,
I am having all admin rights. And also i have checked in Check SLD Connection. It showing the error connection to SLD Could not opened successfully. But SLD is running fine and i have checked in Visual admin SLD datasupplier is running fine.
When i check in the log of the SLD there it is showing
#2852 11/18/2008 18:27:18.265 [SAPEngine_Application_Thread[impl:3]_29] FATAL com.sap.lcr.cimsrv.CIMOMServlet: SLD initialization failure, can not set up cluster-wide event notification. Please check your JMS provider for errors.
Thrown:
com.sap.sld.api.wbem.exception.CIMException: CIM_ERR_FAILED: Failed to initialize cluster notification. Please check your JNDI service and JMS provider for errors.
Is that i need to change the CIM content?
I could not able to get clue on this.
Thank You,
Mahesh C

Cannot create/maintain JCO connection : NullPointerException in SLD

When I want to create a new JCO connection in SLD (via WebDynpro->Content Administrator) , I get an exception :
java.lang.NullPointerException
     at com.sap.tc.webdynpro.serverimpl.wdc.sl.SystemLandscapeFactory.checkStatus(SystemLandscapeFactory.java:991)
     at com.sap.tc.webdynpro.services.sal.sl.api.WDSystemLandscape.checkStatus(WDSystemLandscape.java:469)
     at com.sap.tc.webdynpro.tools.sld.NameDefinition.updateJCODestinations(NameDefinition.java:285)
     at com.sap.tc.webdynpro.tools.sld.NameDefinition.updateNavigation(NameDefinition.java:250)
     at com.sap.tc.webdynpro.tools.sld.NameDefinition.wdDoInit(NameDefinition.java:157)
Because the following document "[Adaptive RFC Troubleshooting Guide|https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/d0019b1a-775f-2910-beb8-d81f27d0d8d0]" suggests that the problem could be an incomplete JCO connection definition, I removed all other existing connections (it's a sandbox system), but this action has not solved the problem.
I also get the message "Exception while getting JCo Clients Failed to get list of defined JCO clients for deployable object 'sap.com/spider_search' " when the Content Administrator screen is displayed.
Any idea of what is missing ?
Thanks,
Eric.

Hi Eric,
Check this forum link using this similar problem got resolved.
can not create jco destination 500   Internal Server Error after sp 13
Thanks
Anup

JCO , Web Dynpro & SLD connection

Hi
Can anyone please let us know why do we need JCO, WebDynpro and SLD configuration. I trying to configuring EP/BI and EP/ERP (MSS/ESS) using SAP configuration guide but not sure what they are used for.
is JCO/SLD/Web Dypro is the requirement for EP/BI & EP/ERP configuration.
Thank you everybody

Hi
The SAP Java Connector (SAP JCo) allows a Java application to communicate with any SAP System.
It provides the bridge to fetch data across stacks and from different r/3 destinations.
check the following Link:
http://help.sap.com/saphelp_nw2004s/helpdata/en/bc/eedf3d0eb8af5ee10000000a114084/content.htm
/message/1648513#1648513 [original link is broken] ...
Check out the following.
what is sld:
http://help.sap.com/saphelp_erp2005/helpdata/en/43/01ea90ab24235de10000000a1553f7/frameset.htm
configuring SLD:
/message/1648513#1648513 [original link is broken]
themes:
http://help.sap.com/saphelp_nw2004s/helpdata/en/2f/0f9e4a815bf449bf35537b2ea0aae3/frameset.htm
creation of themes:
EP Themes
All the Best
Priyanka
Do reward the points

JCO Connection error

Hi,
While giving the parameters for JCO connection in SLD(Technical System Type:- Web As Java) I am taking the destination Type as Application Server.
While creating the JCO connection the JCO connection is getting created but while testing the connection I am getting the following error
<b>com.sap.mw.jco.JCO$Exception: (102) JCO_ERROR_COMMUNICATION: JCO.Client not connected in repository call.</b>Do I need to take destination type as Message Server,what are the Name and Message Server for both?
Please reply.
Regards,
Pawan

Hey in SLD the WEBAS-ABAP technical system is created to identify a SAP system.The common connection properties of the SAP system(like ECC,BW,CRM)are defined under WEBAS-ABAP technical system.For each SAP system one WEBAS-ABAP technical system is created.The changing properties like username password client number of the backend system i.e SAP system are declared under the JCOs.So when you are connecting to SAP system a WEBAS-ABAP technical system should be created and JCOs should be created/specified for webdynpro applications.The JCOs will make use of the WEBAS-ABAP technical system connection properties internally from the SLD also contains the extra connection properties(client no,uname,pwd).So you have to create JCOs when you are communicating with SAP systems.
Note:No need to create JCOs for other systems(non SAP).

JCO Connection

Hi Experts,
We use two types of JCo connections while connecting to back-end .
1 . Modeldata
2 . Metadata
What is the use of each type of JCO connection ?
Thanks a lot .

Hi jain,
I think you have posted some wrong part in your post.
There no two type of JCo Connections; but you can create one JCo connection and specify different parameters to it; one is model data and other is meta data.
model data - shows the default logical system name for model instances that we use in application.
meta data - shows the default logical system name for RFC metadata (Backend R3 meta data).
and both together forms the JCo Connection for the WebDynpro Front-end application.
You can find more idea by login to ContentAdministrator and find your application name and view.
Regards
- Vinod
Edited by: Vinod V on Apr 3, 2008 10:20 AM

How to monitor (Create /Delete )JCo connections

Hi Gurus,
can anyone give me a clear picture of monitoring the Jco connections ,am i want to create the new Jco connection ,and where do i set the max.no connections ..
reward point guaranted
regards,
S.Rajeshkumar

Hi Rajesh
Read,
http://help.sap.com/Business_Packages/EN/ca/115e4088dc0272e10000000a155106/content.htm
regards
Juan

Error while obtaining JCO connection in t-code RSPLAN

Hi Gurus,
I have installed ECC 6.0 SR3 and i have added BI_CONT and updated all the patches. But while trying to access the t-code RSPLAN and after clicking on the START MODELER button it is opening in a browser . after giving the user id and password in the browser , while opening the page it is showing the error " Error while obtaining JCO connection". and how to create jco connections in visual admin.
can anybody please help me in this issue.
Thanks in advance.
Regards,
Babu.

Hi,
when i was trying to open RSPLAN T-Code in BI, i able to open start modeller it says that http://udnubd1:8003/sap/public/myssocntl?sap-client=320 and says that cannot find server. So i request you please can anyone help me onthis issue.
Thanks,
Reddy

Close jco connection

Hi
   Can anyone tell me how to retrieve the existing jco connection and close it. Can we write that code in wdExit.
Thanks
Vidyadhar

Hi,
Following code can be used
AAAAModel thisModel =
                    (AAAAModel) WDModelFactory.getModelInstance(
     AAAAModel.class);
               thisModel.disconnectIfAlive();
You can call this code's method in wdDoExit()

Multilingual JCO connection setup

We want to make our Portal multilingual with the following setup. We have Portal 7.31 installed with following technologies,
- Java web dynpro applications using JCO destinations using user mapping (one hard coded userid/password), language specified in JCO destination is English.
- DynPage HTMLB applications using System landscape connection to SAP using user mapping (one hard coded userid/password). "Master locale" specified in the Landscape object is English
I wanted to change the language attribute in the JCO connection and landscape object so that the RFCs know the language required to send the data back. For JCO connections I can make another french language JCO destination and use that when user switches to french, probably I can do the same thing in case of system landscape object. Is this the right approach?
Would leaving the JCO destination language empty use the Portal user's language preference? Even though I am using a hardcoded userid/password?
Any help and direction appreciated.

hi,
In the J2EE Engine the RFC functions are implemented by the JCo RFC Provider service, which is used for processing ABAP to Java requests. A feature is provided for receiving calls from the SAP systems this is done by registering the J2EE Engine as a RFC destination.
The JCo RFC Provider Service processes calls from the SAP systems. It dispatches the calls to a stateless session bean, which is registered in the J2EE Engine naming system. By naming convention the JNDI name used is identical to the name of the SAP function module.
cheers,
jo

Settings SLD and JCO connection for Java Web Dynpro

Hi BI Gurus,
I'm a Business Intelligence newbye and I'm a bit confused about Web Dynpro configurations.
I try to execute, through Netweaver Developer Studio 7, a simple java Web Dynpro who call the standard Flight List BAPI.
My configuration is: NW 2004s installed on BI server (with java instance and j2EE Server) and Flight List BAPI stored on R/3 ECC. 5 System in another server.
Now, my doubt are:
1) in SLD Data Supplier (J2EE Visual Admin on BI Server) CIM configuration, what are the connections parameter necessary?The BI host or R/3 host?
2)if I set BW system parameters in SLD and in NWDS when I try to run my simple web dynpro an error occour This is the output:
The initial exception that caused the request to fail, was:
com.sap.tc.webdynpro.services.exceptions.WDRuntimeException: Failed to resolve JCO destination name 'WD_FLIGHTLIST_RFC_METADATA_DEST' in the SLD. No such JCO destination is defined in the SLD.
Correction Hints
Accessing the System Landsape Directory (SLD) failed. Depending on the concrete reason (see root cause) check the following:
is the SLD Supplier in the J2EE engine configured correctly? See the SLD documentation for more details about the SLD and about how to configure it.
are all JCO destinations maintained correctly? Use the preinstalled Web Dynpro Content Admin application to check/edit the destination. Use the Ping and Test functions of the Content Admin to verify that each destination is properly configured.
Additional information about the System Landscape Directory and the Web Dynpro Content Admin can be found in the SAP Developer Network (SDN) and in the Online Help for the SAP Web Application Server (installed with SAP NetWeaver Developer Studio and available online).
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.
3)where can I create new JCO connections?What are the requirements settings?
I am always available for answers about the post!!
Help me please!!
Thanks thousand and sorry for my incorrect english!!

Andrea,
You can Create the JCo destination from Content Administrator. You must login as Administrator.
use the link as
http://<server>:<port>/webdynpro/welcome/Welcome.jsp, select Content Administator->Create JCo Destinations/Maintain JCo Destinations.
Please have a look on the following links regarding creating/maintaining JCo destinations. The are usally asked questions regarding JCo destinations.
Create JCo destinations:
/message/4947478#4947478 [original link is broken]
Creating JCO Destinations
/message/5369333#5369333 [original link is broken]
Rgs,
Dni

SLD Communication: LD_ERROR and RWB not connected to SLD

Hi all,
I have installed SR2 on MS SQL Server 2005
I have run the template installer and also rectified the errored out steps
All RFC destnation are created propely and thr connection checked
I have three queries
1) In SLDCHECK the error i get is
         Calling function LCR_LIST_BUSINESS_SYSTEMS
          Retrieving data from the SLD server...
          Function call returned exception code     4
          => Check whether the SLD is running!
2)In SXI_CHACHE cache is obsolete and there is LD_ERROR
3)In RWB the component monitoring and other stuff when i try to open give and error
       Communication from SLD failed:500 Internal server Error
I went throught note 764176
and did the following
1. In the SLD editing interface, choose "Administration" -> "Content Maintenance". Select "XI Integration Server" from the drop-down menu, and navigate to the associations of the integration server. Select the "XI Integration Server Logical Identity" association and delete the association by choosing 'Remove'.
2. Switch to "Home" in the "Technical Landscape" view, and select the "Exchange Infrastructure" technical system type there. Select all domains and XI components for the host and delete these by selecting them and pressing 'Remove'.
3. Restart the J2EE server. After you restart the server, the XI components log on to the SLD again and create a new entity of class "XI Integration Server".
But after restart none were registered .. i also tried logging into Rep and Dir but these were not registered
in "Technical Landscape" ->"Exchange Infrastructure"
Rgds
aditya

I have three queries
1) In SLDCHECK the error i get is
Calling function LCR_LIST_BUSINESS_SYSTEMS
Retrieving data from the SLD server...
Function call returned exception code 4
=> Check whether the SLD is running!
2)In SXI_CHACHE cache is obsolete and there is LD_ERROR
3)In RWB the component monitoring and other stuff when i try to open give and error
Communication from SLD failed:500 Internal server Error
Firstly are you installing the PI7.0?
1) In SLDCHECK the error i get is
Calling function LCR_LIST_BUSINESS_SYSTEMS
Retrieving data from the SLD server...
Function call returned exception code 4
=> Check whether the SLD is running!
check the SLDAPICUST is pointing to correct SLD,
check RFC destinations LCR*, SAPSLDAPI (check this names in the Intallation document once) are created and working fine.
Also make sure your SLD is up and running.....
You need to cross check the JCO connections created.....
2)In SXI_CHACHE cache is obsolete and there is LD_ERROR
check RFC destination integreation_directory_HMI is created and working fine.....

SLD configuration - JCO connection with SAP Router

Hi,
I installed the new Sneak Preview SP11 Java Edition including SAP Portal. I tried to run an own Web Dynpro Application with RFC-Access on a R/3 System.
Unfortunately I was not able to get the JCO Connection to run. The R/3 System is reached via SAP Router. I am a little bit confused, because with the last Sneak Preview (SP6 or SP7) this application was running without problems. Of course I thought that this can't be. So I uninstalled SP11 and installed the old version (SP7). I configured the JCO-connection, no problems.
Now I know that this is not my mistake (hopefully ).
If I configured a JCO-connection in SP11 and tried to PING, the first PING was ok. After testing the connection with user, the PING failed. The testing with user returns something like "user or password are not accepted".
Any ideas?
Best regards
Renald

In your SLD configuration, what do you have as your Logon Group under the message server config. Is it "PUBLIC". if so, then the user id needs to belong to that Logon Group in the system.
Regards,
Rich Heilman

JCo connection and SLD

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