JCO Destination problem

[Former Member]

Hi All,

I have integrated my webdynpro application in my portal , the application was working for quite some time all of a sudden it is giving the following error

Could not create JCOClientConnection for logical System: WD_SAP_MODELDATA_DESTINATION - Model: class com.allaind.us.model.customerModel. Please assure that you have configured the RFC connections and/or logical system name properly for this model!

What could be the reason.

[Former Member]

Hi,

SAP JCo Functions,Architecture,Applications,Installation,Client & Server Programming :

http://help.sap.com/saphelp_nw70/helpdata/en/6f/1bd5c6a85b11d6b28500508b5d5211/frameset.htm

Creating Jco destination:

http://help.sap.com/saphelp_nw70/helpdata/en/3a/3b1b40fcdd8f5ce10000000a155106/frameset.htm

Maintaining Jco destination:

http://help.sap.com/saphelp_nw70/helpdata/en/94/3c1b40fcdd8f5ce10000000a155106/frameset.htm

The SAP JCo Repository :

http://help.sap.com/saphelp_nw70/helpdata/en/01/43e13d82fcfb34e10000000a114084/frameset.htm

Dynamic Jco creation Blogs:

/people/anilkumar.vippagunta2/blog/2007/02/06/dynamic-jco-creation

/people/gregor.wolf3/blog/2004/09/23/from-function-module-to-jco-application--part-1-of-3

[Former Member]

<b>Hi

Check the Following URL and you may get some idea about what is Jco (Java Connector)

Building, Deploying, Configuring, and Running Your Application

http://help.sap.com/saphelp_nw04/helpdata/en/f8/bdfe80d9a3b048a5fb32a7d149774e/frameset.htm

Connectivity and Interoperability

http://help.sap.com/saphelp_nw04/helpdata/en/ed/89746bea5011d6b2e800508b6b8a93/frameset.htm

Creating a JCO.Function Object

http://help.sap.com/saphelp_nw04/helpdata/en/9f/44e13d82fcfb34e10000000a114084/frameset.htm

JCo Client Service

http://help.sap.com/saphelp_nw04/helpdata/en/40/003c41325fa831e10000000a1550b0/frameset.htm

Regards

Chandran</b>

[former_member751941]

Hi Sapuser,

Through the following steps you can to see the whether you JCo ‘s is configured or not and check the status of the JCO.

Step 1: Logon to the server: http://hostname:post/index.html

Step2 : Choose Web Dynpro

Step3 : Choose Content Administrator

Step4 : Select “Maintain JCo Destinations” button.

Or use the URL : http://hostname:port/webdynpro/dispatcher/sap.com/tc_wdtools/Explorer

and then select “Maintain JCo Destinations” button.

Regards,

Mithu

[Former Member]

Hi,

It basically happens due to many open connections. Did your problem resolve..?

Thanks and Regards

Avijit

[Former Member]

The problem will surely be solved using the disconnectIfAlive() methode.

After each call to RFC, I also got this type of error and follows as written above and my problem was solved.... It basically happens due to many open connections

After each call of RFC use the disconnectIfAlive() mothod as written above and your problem will surely be resolved..

Please reward good points if it helps..

Thanks

Avijit

[Former Member]

Hi Avijit ,

Thanks for the reply , i am calling disconnectIfAlive() in my application , The application was working fine for couple of days , all of a sudden it is giving this problem ... any help???

[Former Member]

Hi

Check the JCo Pool Configuration settings of your JCO Destination. This message normally comes when the maximum connections has been reached. Increase the "Maximum Connections" to some number depending on the usage. follow these steps.

1. Login to Content Administrator using Administrator rights.

http://localhost:50000/webdynpro/welcome/Welcome.jsp

2. click on content administrator.

3. Navigate under deployment content choose your project which you want to edit JCO connections and click on application.

other way is

Good to disconnect the jco connection after executing the same in your webdynpro code if you don't want it to be synchronous.

<ModelName>.modelInstance().disconnectIfAlive()

Check this thread too