Eror in JCo Connection

Hello All,
I created an Application which will call a BAPI ,aceept input from the user and deliver the Output.
But when I'm executing this Application I'm getting the following Runtime Exception.
<b>com.sap.tc.webdynpro.services.exceptions.WDRuntimeException: Error while obtaining JCO connection.</b>
Can anyone help me out in resolving this ?
Regards,
Deepu.K

Hi,
logon on the EP and go under <b>Content Admin -> Web Dynpro -> Mantain JCo Destinations</b>.
In the table at the center of the Portal Content Studio you'll see all the JCo prensent into your Web AS Java.
You can filter them by application using the combo.
After you have viewed your application's JCo press the corresponding button TEST and read the result on the bottom of the page.
Reward points for helpful answers.
Best regards,
Gianluca Barile

Similar Messages

JCO connection pool is exhausted

hi
I am using RFC module in my web dynpro application. When the application is used for sometime, the JCO connection will get exhusted. The JCO connection will not release itself. I can't find any method in web dynpro to release the connection manually. How can I solve this problem?

Hi,
What is scope of the connection. View properties of MODELDATA and METADATA destinations.
You can change the scope of the connection..
or
wdContext.current<BAPI INPUT>Element().modelObject().modelInstance().disconnectIfAlive();
For more ways , give a forum search.. There are a lot of close forum posts.. Gud luc..
Regards
Bharathwaj

Problem with JCo Connection Pool

Hi,
I have a problem with using an RFC Model in my WebApplication. So sometimes the access to the function block works, and sometimes it doesn't work. Now I know, that there is a problem with the connection pool. Look at this message:
com.sap.mw.jco.JCO$Exception: (106) JCO_ERROR_RESOURCE: Connection pool WD_X24_MODELDATA_DEST_CPIC_REKTO_DE_useDefinedUser is exhausted. The current pool size limit (max connections) is 10 connections.
So it looks like a problem with closing the JCo Connections after using. Do know where the problem is? Because I'm using many other function blocks with no problems.

Hello,
You need to increase the pool size via Visual Administrator.
Server 0 -> Services -> JCO RFC Connections.
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Regards,
Jan

Unable to close metadata jco connection

Hi Experts,
when checking the JCo Connection Pools in Web Dynpro Console, I found that all MetaData JCo are in use and unable to disconnect automatically.
the following is metadata jco destination setting
Maximal Pool Size 1
Maximum Connections 5
Connection Timeout 60
Maximum Wait Time 10
how can i do to close these jco connection?

Hi Sidney,
I dont really understand why you want to remove the Jco connections. If you click on the "Remove" button as posted earlier by someone, it will completely remove your Jco configurations and you have to create them again on your own. SO, dont do that.
If you want to disconnect the Jco connection in webdynpro java, we can do that by using the following piece of code at the end of the connection process.
As far as I know, by default the Jco connections gets disconnected after certain time limit. Because, I never had to disconnect the Jco whenever I used one.
wdContext.currentModelElement().modelObject().modelInstance().disconnectIfAlive()
Regards,
Gopal.

How to use a JCO connection pool in an EJB?

Hi *,
I want to build a WebService using SAP Web AS (J2EE Engine) that connects to a R/3 ERP (release 4.7).
I thought of building a stateless session bean that will be deployed as webservice. The session bean shall connect to the R/3 in order to call some BAPIs. I'd like to use a JCO connection pool. But I'm not sure, where I should create and destroy the connection pool. Are the EJB methods ejbCreate() and ejbRemove() the right ones? If so, my businness methods would just have to get a connection from the pool and call the BAPIs, right? If not, what do you suggest?
Another question: I already deployed a bean as webservice. Since not really knowing how to use the connection pool, I created a bean with one business method that creates a connection pool whenever it gets called. But if I have to change something in the bean so that I have to redeploy the bean I can't call my business method anymore, because JCO cannot load a native library once again, as it is already loaded, This leads to an exception. So I have to restart the complete engine everytime I redeploy my bean. Are there any workarounds for this problem? I'm not sure whether this is connected to the wrong use of the JCO connection pool.
Kind regards,
Lars

Hi *,
I want to build a WebService using SAP Web AS (J2EE Engine) that connects to a R/3 ERP (release 4.7).
I thought of building a stateless session bean that will be deployed as webservice. The session bean shall connect to the R/3 in order to call some BAPIs. I'd like to use a JCO connection pool. But I'm not sure, where I should create and destroy the connection pool. Are the EJB methods ejbCreate() and ejbRemove() the right ones? If so, my businness methods would just have to get a connection from the pool and call the BAPIs, right? If not, what do you suggest?
Another question: I already deployed a bean as webservice. Since not really knowing how to use the connection pool, I created a bean with one business method that creates a connection pool whenever it gets called. But if I have to change something in the bean so that I have to redeploy the bean I can't call my business method anymore, because JCO cannot load a native library once again, as it is already loaded, This leads to an exception. So I have to restart the complete engine everytime I redeploy my bean. Are there any workarounds for this problem? I'm not sure whether this is connected to the wrong use of the JCO connection pool.
Kind regards,
Lars

Single Webdynpro Application with multiple JCO Connection ?

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I have a strange requirement ......
We have a Webdynpro Application which is connected to
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now i want to connect the same Webdynpro application to
Client:- B which is again in the same server as the client A.
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Please help.
Points would be rewarded to helpful answers.
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Sanjyoti.

Hi experts
                    We have to use wd application for both client at a same time e.g. as follow
Client A -
> Travel app--->Featches data from A for   employee hired in client A ,in same server as B
Client B -
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we are using same EP for both client but using diffrent roles for employees of both client.
Please reply asap.

Error while obtaining JCO connection when creating JCO connection

Hey,
im having a problem when creating a JCO connection in the Web Dynpro Content Administrator. Creating the Modeldata (Application Data Data type) JCO Worked but when creating the JCO for the RFC Metadata (Dictionary Meta data) there is a problem:
In step 3.2 Msg server connection I cannot specify a system name and logon group, only the message server can be selected with the dropdown box.
After pushing the finish button i get the following stacktrace:
Failed to create new JCO client connection WD_RFC_METADATA_DEST: com.sap.tc.webdynpro.services.sal.sl.api.WDSystemLandscapeException: Error while obtaining JCO connection. at com.sap.tc.webdynpro.serverimpl.wdc.sl.SystemLandscapeFactory.getJCOClientConnection(SystemLandscapeFactory.java:150) at
com.sap.tc.webdynpro.serverimpl.wdc.sl.SystemLandscapeFactory.createJCOClientConnection(SystemLandscapeFactory.java:356) at
com.sap.tc.webdynpro.services.sal.sl.api.WDSystemLandscape.createJCOClientConnection(WDSystemLandscape.java:107) at
com.sap.tc.webdynpro.tools.sld.ButtonBar.onActionFinish(ButtonBar.java:224) at com.sap.tc.webdynpro.tools.sld.wdp.InternalButtonBar.wdInvokeEventHandler(InternalButtonBar.java:265) 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.task.WebDynproMainTask.handleAction(WebDynproMainTask.java:101) at
com.sap.tc.webdynpro.clientserver.task.WebDynproMainTask.handleActionEvent(WebDynproMainTask.java:304) at
com.sap.tc.webdynpro.clientserver.task.WebDynproMainTask.execute(WebDynproMainTask.java:649) at
com.sap.tc.webdynpro.clientserver.cal.AbstractClient.executeTasks(AbstractClient.java:59) at
com.sap.tc.webdynpro.clientserver.cal.ClientManager.doProcessing(ClientManager.java:248) at
com.sap.tc.webdynpro.serverimpl.defaultimpl.DispatcherServlet.doWebDynproProcessing(DispatcherServlet.java:154) at
com.sap.tc.webdynpro.serverimpl.defaultimpl.DispatcherServlet.doContent(DispatcherServlet.java:116) at
com.sap.tc.webdynpro.serverimpl.defaultimpl.DispatcherServlet.doPost(DispatcherServlet.java:55) at
javax.servlet.http.HttpServlet.service(HttpServlet.java:760) at
javax.servlet.http.HttpServlet.service(HttpServlet.java:853) at
com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.runServlet(HttpHandlerImpl.java:390) at
com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.handleRequest(HttpHandlerImpl.java:264) at
com.sap.engine.services.httpserver.server.RequestAnalizer.startServlet(RequestAnalizer.java:347) at
com.sap.engine.services.httpserver.server.RequestAnalizer.startServlet(RequestAnalizer.java:325) at
com.sap.engine.services.httpserver.server.RequestAnalizer.invokeWebContainer(RequestAnalizer.java:887) at
com.sap.engine.services.httpserver.server.RequestAnalizer.handle(RequestAnalizer.java:241) at
com.sap.engine.services.httpserver.server.Client.handle(Client.java:92) at
com.sap.engine.services.httpserver.server.Processor.request(Processor.java:148) at
com.sap.engine.core.service630.context.cluster.session.ApplicationSessionMessageListener.process(ApplicationSessionMessageListener.java:33) at
com.sap.engine.core.cluster.impl6.session.MessageRunner.run(MessageRunner.java:41) at
com.sap.engine.core.thread.impl3.ActionObject.run(ActionObject.java:37) at
java.security.AccessController.doPrivileged(Native Method) at com.sap.engine.core.thread.impl3.SingleThread.execute(SingleThread.java:95) at
com.sap.engine.core.thread.impl3.SingleThread.run(SingleThread.java:160) Caused by: com.sap.tc.webdynpro.services.exceptions.WDRuntimeException: Failed to resolve connection parameter for WD_RFC_METADATA_DEST at
com.sap.tc.webdynpro.serverimpl.wdc.sl.JCOClientConnection.resolveConnectionParameter4MsgServerJCODestinaton(JCOClientConnection.java:664) at
com.sap.tc.webdynpro.serverimpl.wdc.sl.JCOClientConnection.resolveConnectionParameter(JCOClientConnection.java:508) at
com.sap.tc.webdynpro.serverimpl.core.sl.AbstractJCOClientConnection.init(AbstractJCOClientConnection.java:248) at
com.sap.tc.webdynpro.serverimpl.core.sl.AbstractJCOClientConnection.<init>(AbstractJCOClientConnection.java:222) at
com.sap.tc.webdynpro.serverimpl.wdc.sl.JCOClientConnection.<init>(JCOClientConnection.java:101) at
com.sap.tc.webdynpro.serverimpl.wdc.sl.SystemLandscapeFactory.getJCOClientConnection(SystemLandscapeFactory.java:148) ... 30 more Caused by: java.lang.NullPointerException at java.util.Hashtable.put(Hashtable.java:393) at com.sap.tc.webdynpro.serverimpl.wdc.sl.JCOClientConnection.resolveConnectionParameter4MsgServerJCODestinaton(JCOClientConnection.java:558) ... 35 more
We are running WebAS 640 SP 14 on Unix.
Greetings,
Hannes
Message was edited by: Hannes Defloo

Hi
Please configure your SLD. Your SLD holds the system definition. Define a SAP WebAS abap system and then try to create a Metadata connection using WebDynpro content administrator. Now you will be able to see the msg server defined in the dropdown. Also ensure that you have the message server entry in your services file.
Refer these links for SLD
http://help.sap.com/saphelp_nw04/helpdata/en/c9/dc37520bdf4b48bb8f6d4329f073d5/content.htm
http://help.sap.com/saphelp_nw04/helpdata/en/24/8fa93e08503614e10000000a114084/content.htm
Hope that helps.
regards
Ravi

Error while creating jco connection for metadata?

Hi all,
we are using ep 6 sp 16.
I could create the JCO connection for application data but i am not able to create the jco connection for metadata for the same r3 server .
while creating the the connection
system name and logon group and disable
and when i click finish
it is giving following error
Failed to create new JCO client connection testmetadata: com.sap.tc.webdynpro.services.sal.sl.api.WDSystemLandscapeException: Error while obtaining JCO connection. at com.sap.tc.webdynpro.serverimpl.wdc.sl.SystemLandscapeFactory.getJCOClientConnection(SystemLandscapeFactory.java:150) at com.sap.tc.webdynpro.serverimpl.wdc.sl.SystemLandscapeFactory.createJCOClientConnection(SystemLandscapeFactory.java:356) at com.sap.tc.webdynpro.services.sal.sl.api.WDSystemLandscape.createJCOClientConnection(WDSystemLandscape.java:107) at com.sap.tc.webdynpro.tools.sld.ButtonBar.onActionFinish(ButtonBar.java:224) at com.sap.tc.webdynpro.tools.sld.wdp.InternalButtonBar.wdInvokeEventHandler(InternalButtonBar.java:265) 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.task.WebDynproMainTask.handleAction(WebDynproMainTask.java:101) at com.sap.tc.webdynpro.clientserver.task.WebDynproMainTask.handleActionEvent(WebDynproMainTask.java:304) at com.sap.tc.webdynpro.clientserver.task.WebDynproMainTask.execute(WebDynproMainTask.java:659) at com.sap.tc.webdynpro.clientserver.cal.AbstractClient.executeTasks(AbstractClient.java:59) at com.sap.tc.webdynpro.clientserver.cal.ClientManager.doProcessing(ClientManager.java:251) at com.sap.tc.webdynpro.serverimpl.defaultimpl.DispatcherServlet.doWebDynproProcessing(DispatcherServlet.java:154) at com.sap.tc.webdynpro.serverimpl.defaultimpl.DispatcherServlet.doContent(DispatcherServlet.java:116) at com.sap.tc.webdynpro.serverimpl.defaultimpl.DispatcherServlet.doPost(DispatcherServlet.java:55) at javax.servlet.http.HttpServlet.service(HttpServlet.java:760) at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) at com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.runServlet(HttpHandlerImpl.java:390) at com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.handleRequest(HttpHandlerImpl.java:264) at com.sap.engine.services.httpserver.server.RequestAnalizer.startServlet(RequestAnalizer.java:347) at com.sap.engine.services.httpserver.server.RequestAnalizer.startServlet(RequestAnalizer.java:325) at com.sap.engine.services.httpserver.server.RequestAnalizer.invokeWebContainer(RequestAnalizer.java:887) at com.sap.engine.services.httpserver.server.RequestAnalizer.handle(RequestAnalizer.java:241) at com.sap.engine.services.httpserver.server.Client.handle(Client.java:92) at com.sap.engine.services.httpserver.server.Processor.request(Processor.java:148) at com.sap.engine.core.service630.context.cluster.session.ApplicationSessionMessageListener.process(ApplicationSessionMessageListener.java:33) at com.sap.engine.core.cluster.impl6.session.MessageRunner.run(MessageRunner.java:41) at com.sap.engine.core.thread.impl3.ActionObject.run(ActionObject.java:37) at java.security.AccessController.doPrivileged(AccessController.java:180) at com.sap.engine.core.thread.impl3.SingleThread.execute(SingleThread.java:100) at com.sap.engine.core.thread.impl3.SingleThread.run(SingleThread.java:170) Caused by: com.sap.tc.webdynpro.services.exceptions.WDRuntimeException: Failed to resolve connection parameter for testmetadata at com.sap.tc.webdynpro.serverimpl.wdc.sl.JCOClientConnection.resolveConnectionParameter4MsgServerJCODestination(JCOClientConnection.java:670) at com.sap.tc.webdynpro.serverimpl.wdc.sl.JCOClientConnection.resolveConnectionParameter(JCOClientConnection.java:486) at com.sap.tc.webdynpro.serverimpl.core.sl.AbstractJCOClientConnection.init(AbstractJCOClientConnection.java:252) at com.sap.tc.webdynpro.serverimpl.core.sl.AbstractJCOClientConnection.<init>(AbstractJCOClientConnection.java:226) at com.sap.tc.webdynpro.serverimpl.wdc.sl.SystemLandscapeFactory.getJCOClientConnection(SystemLandscapeFactory.java:148) at com.sap.tc.webdynpro.serverimpl.wdc.sl.SystemLandscapeFactory.createJCOClientConnection(SystemLandscapeFactory.java:356) at com.sap.tc.webdynpro.services.sal.sl.api.WDSystemLandscape.createJCOClientConnection(WDSystemLandscape.java:107) at com.sap.tc.webdynpro.tools.sld.ButtonBar.onActionFinish(ButtonBar.java:224) at com.sap.tc.webdynpro.tools.sld.wdp.InternalButtonBar.wdInvokeEventHandler(InternalButtonBar.java:265) 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.task.WebDynproMainTask.handleAction(WebDynproMainTask.java:101) at com.sap.tc.webdynpro.clientserver.task.WebDynproMainTask.handleActionEvent(WebDynproMainTask.java:304) at com.sap.tc.webdynpro.clientserver.task.WebDynproMainTask.execute(WebDynproMainTask.java:659) at com.sap.tc.webdynpro.clientserver.cal.AbstractClient.executeTasks(AbstractClient.java:59) at com.sap.tc.webdynpro.clientserver.cal.ClientManager.doProcessing(ClientManager.java:251) at com.sap.tc.webdynpro.serverimpl.defaultimpl.DispatcherServlet.doWebDynproProcessing(DispatcherServlet.java:154) at com.sap.tc.webdynpro.serverimpl.defaultimpl.DispatcherServlet.doContent(DispatcherServlet.java:116) at com.sap.tc.webdynpro.serverimpl.defaultimpl.DispatcherServlet.doPost(DispatcherServlet.java:55) at javax.servlet.http.HttpServlet.service(HttpServlet.java:760) at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) at com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.runServlet(HttpHandlerImpl.java:390) at com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.handleRequest(HttpHandlerImpl.java:264) at com.sap.engine.services.httpserver.server.RequestAnalizer.startServlet(RequestAnalizer.java:347) at com.sap.engine.services.httpserver.server.RequestAnalizer.startServlet(RequestAnalizer.java:325) at com.sap.engine.services.httpserver.server.RequestAnalizer.invokeWebContainer(RequestAnalizer.java:887) at com.sap.engine.services.httpserver.server.RequestAnalizer.handle(RequestAnalizer.java:241) at com.sap.engine.services.httpserver.server.Client.handle(Client.java:92) at com.sap.engine.services.httpserver.server.Processor.request(Processor.java:148) at com.sap.engine.core.service630.context.cluster.session.ApplicationSessionMessageListener.process(ApplicationSessionMessageListener.java:33) at com.sap.engine.core.cluster.impl6.session.MessageRunner.run(MessageRunner.java:41) at com.sap.engine.core.thread.impl3.ActionObject.run(ActionObject.java:37) at java.security.AccessController.doPrivileged(AccessController.java:180) at com.sap.engine.core.thread.impl3.SingleThread.execute(SingleThread.java:100) at com.sap.engine.core.thread.impl3.SingleThread.run(SingleThread.java:170) Caused by: java.lang.NullPointerException at java.util.Hashtable.put(Hashtable.java:606) at com.sap.tc.webdynpro.serverimpl.wdc.sl.JCOClientConnection.resolveConnectionParameter4MsgServerJCODestination(JCOClientConnection.java:564) at com.sap.tc.webdynpro.serverimpl.wdc.sl.JCOClientConnection.resolveConnectionParameter(JCOClientConnection.java:486) at com.sap.tc.webdynpro.serverimpl.core.sl.AbstractJCOClientConnection.init(AbstractJCOClientConnection.java:252) at com.sap.tc.webdynpro.serverimpl.core.sl.AbstractJCOClientConnection.<init>(AbstractJCOClientConnection.java:226) at com.sap.tc.webdynpro.serverimpl.wdc.sl.SystemLandscapeFactory.getJCOClientConnection(SystemLandscapeFactory.java:148) at com.sap.tc.webdynpro.serverimpl.wdc.sl.SystemLandscapeFactory.createJCOClientConnection(SystemLandscapeFactory.java:356) at com.sap.tc.webdynpro.services.sal.sl.api.WDSystemLandscape.createJCOClientConnection(WDSystemLandscape.java:107) at com.sap.tc.webdynpro.tools.sld.ButtonBar.onActionFinish(ButtonBar.java:224) at com.sap.tc.webdynpro.tools.sld.wdp.InternalButtonBar.wdInvokeEventHandler(InternalButtonBar.java:265) 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.task.WebDynproMainTask.handleAction(WebDynproMainTask.java:101) at com.sap.tc.webdynpro.clientserver.task.WebDynproMainTask.handleActionEvent(WebDynproMainTask.java:304) at com.sap.tc.webdynpro.clientserver.task.WebDynproMainTask.execute(WebDynproMainTask.java:659) at com.sap.tc.webdynpro.clientserver.cal.AbstractClient.executeTasks(AbstractClient.java:59) at com.sap.tc.webdynpro.clientserver.cal.ClientManager.doProcessing(ClientManager.java:251) at com.sap.tc.webdynpro.serverimpl.defaultimpl.DispatcherServlet.doWebDynproProcessing(DispatcherServlet.java:154) at com.sap.tc.webdynpro.serverimpl.defaultimpl.DispatcherServlet.doContent(DispatcherServlet.java:116) at com.sap.tc.webdynpro.serverimpl.defaultimpl.DispatcherServlet.doPost(DispatcherServlet.java:55) at javax.servlet.http.HttpServlet.service(HttpServlet.java:760) at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) at com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.runServlet(HttpHandlerImpl.java:390) at com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.handleRequest(HttpHandlerImpl.java:264) at com.sap.engine.services.httpserver.server.RequestAnalizer.startServlet(RequestAnalizer.java:347) at com.sap.engine.services.httpserver.server.RequestAnalizer.startServlet(RequestAnalizer.java:325) at com.sap.engine.services.httpserver.server.RequestAnalizer.invokeWebContainer(RequestAnalizer.java:887) at com.sap.engine.services.httpserver.server.RequestAnalizer.handle(RequestAnalizer.java:241) at com.sap.engine.services.httpserver.server.Client.handle(Client.java:92) at com.sap.engine.services.httpserver.server.Processor.request(Processor.java:148) at com.sap.engine.core.service630.context.cluster.session.ApplicationSessionMessageListener.process(ApplicationSessionMessageListener.java:33) at com.sap.engine.core.cluster.impl6.session.MessageRunner.run(MessageRunner.java:41) at com.sap.engine.core.thread.impl3.ActionObject.run(ActionObject.java:37) at java.security.AccessController.doPrivileged(AccessController.java:180) at com.sap.engine.core.thread.impl3.SingleThread.execute(SingleThread.java:100) at com.sap.engine.core.thread.impl3.SingleThread.run(SingleThread.java:170)
Thanking.
Rajendra

Hello Rajendra,
Good to hear from u. Let me try to give a soln for this problem of yours.
I think probably the logon group has not been specified in the backend.If thats the case then do the following:
Connect to the backend server for which you are trying to create the JCO. Run the transaction SMLG. It will show u the existing logon groups. carry out the following steps if the 'PUBLIC' group is not present in the list of logon groups.
Click on the create button. In the pop-up, type the logon as 'PUBLIC'. For the instance, select the F4 help and choose the existing instance number. Click on copy and click save. Try running the transaction /nsmlg and now it should show the logon group 'PUBLIC'.
When you create the JCO connection, it should now show the logon group 'PUBLIC'.
Regards,
Prathamesh.

Error while obtaining JCO connection.

Hi I'm trying to put in place since BW-SEM RSPLAN the transaction, I'm pointing at my portal from the transaction RSPLSA
But when it signs the user gets the message Error while obtaining JCO connection.
I was reviewing my WebDynpro on my site by following these steps:
1 I will http://portal:port
2 I clicked Webdynpro
3 I click on Content Administrator
I clicked on 4 Maintain JCO destinations
and then I log shows the following:
Failed to process request. Please contact your system administrator.
[Hide]
Error Summary
While processing the current request, an exception occured which could not be handled by the application or the framework.
If the information contained on this page doesn't help you to find and correct the cause of the problem, please contact your system administrator. To facilitate analysis of the problem, keep a copy of this error page. Hint: Most browsers allow to select all content, copy it and then paste it into an empty document (e.g. email or simple text file).
Root Cause
The initial exception that caused the request to fail, was:
   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:485)
    at com.sap.tc.webdynpro.tools.explorer.JCOConnectionsDetails.updateJCOClientStatus(JCOConnectionsDetails.java:480)
    at com.sap.tc.webdynpro.tools.explorer.JCOConnectionsDetails.addJCOClientToList(JCOConnectionsDetails.java:699)
    at com.sap.tc.webdynpro.tools.explorer.JCOConnectionsDetails.addJCOClientToList(JCOConnectionsDetails.java:663)
    ... 39 more
See full exception chain for details.
System Environment
Client
Web Dynpro Client Type     HTML Client
User agent     Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.3) Gecko/2008092417 Firefox/3.0.3
Version     null
DOM version     null
Client Type     ns7
Client Type Profile     nn7
ActiveX     disabled
Cookies     enabled
Frames     enabled
Java Applets     enabled
JavaScript     enabled
Tables     enabled
VB Script     enabled
Server
Web Dynpro Runtime     Vendor: SAP, build ID: 7.0014.20071210061512.0000 (release=645_VAL_REL, buildtime=2007-12-10:05:23:29[UTC], changelist=470565, host=pwdfm101), build date: Wed Oct 01 12:15:02 CDT 2008
J2EE Engine     7.00 patchlevel 109886.44
Java VM     IBM J9 VM, version:2.3, vendor: IBM Corporation
Operating system     AIX, version: 5.3, architecture: ppc64
Session & Other
Session Locale     en_US
Time of Failure     Thu Nov 06 16:00:23 CST 2008 (Java Time: 1226008823202)
Web Dynpro Code Generation Infos
sap.com/tcwdtools
No information available     null
sap.com/tcwddispwda
No information available     null
sap.com/tcwdcorecomp
No information available     null
Detailed Error Information
Detailed Exception Chain
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:485)
     at com.sap.tc.webdynpro.tools.explorer.JCOConnectionsDetails.updateJCOClientStatus(JCOConnectionsDetails.java:480)
     at com.sap.tc.webdynpro.tools.explorer.JCOConnectionsDetails.addJCOClientToList(JCOConnectionsDetails.java:699)
     at com.sap.tc.webdynpro.tools.explorer.JCOConnectionsDetails.addJCOClientToList(JCOConnectionsDetails.java:663)
     at com.sap.tc.webdynpro.tools.explorer.JCOConnectionsDetails.wdDoInit(JCOConnectionsDetails.java:121)
     at com.sap.tc.webdynpro.tools.explorer.wdp.InternalJCOConnectionsDetails.wdDoInit(InternalJCOConnectionsDetails.java:262)
     at com.sap.tc.webdynpro.progmodel.generation.DelegatingView.doInit(DelegatingView.java:61)
     at com.sap.tc.webdynpro.progmodel.controller.Controller.initController(Controller.java:215)
     at com.sap.tc.webdynpro.progmodel.view.View.initController(View.java:445)
     at com.sap.tc.webdynpro.progmodel.controller.Controller.init(Controller.java:200)
     at com.sap.tc.webdynpro.progmodel.view.ViewManager.getView(ViewManager.java:709)
     at com.sap.tc.webdynpro.progmodel.view.ViewManager.bind(ViewManager.java:555)
     at com.sap.tc.webdynpro.progmodel.view.ViewManager.makeVisible(ViewManager.java:789)
     at com.sap.tc.webdynpro.progmodel.view.ViewManager.performNavigation(ViewManager.java:296)
     at com.sap.tc.webdynpro.clientserver.cal.ClientApplication.navigate(ClientApplication.java:767)
     at com.sap.tc.webdynpro.clientserver.cal.ClientComponent.navigate(ClientComponent.java:881)
     at com.sap.tc.webdynpro.clientserver.window.WindowPhaseModel.doNavigation(WindowPhaseModel.java:498)
     at com.sap.tc.webdynpro.clientserver.window.WindowPhaseModel.processRequest(WindowPhaseModel.java:144)
     at com.sap.tc.webdynpro.clientserver.window.WebDynproWindow.processRequest(WebDynproWindow.java:335)
     at com.sap.tc.webdynpro.clientserver.cal.AbstractClient.executeTasks(AbstractClient.java:143)
     at com.sap.tc.webdynpro.clientserver.session.ApplicationSession.doProcessing(ApplicationSession.java:319)
     at com.sap.tc.webdynpro.clientserver.session.ClientSession.doApplicationProcessingStandalone(ClientSession.java:713)
     at com.sap.tc.webdynpro.clientserver.session.ClientSession.doApplicationProcessing(ClientSession.java:666)
     at com.sap.tc.webdynpro.clientserver.session.ClientSession.doProcessing(ClientSession.java:250)
     at com.sap.tc.webdynpro.clientserver.session.RequestManager.doProcessing(RequestManager.java:149)
     at com.sap.tc.webdynpro.serverimpl.defaultimpl.DispatcherServlet.doContent(DispatcherServlet.java:62)
     at com.sap.tc.webdynpro.serverimpl.defaultimpl.DispatcherServlet.doPost(DispatcherServlet.java:53)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
     at com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.runServlet(HttpHandlerImpl.java:401)
     at com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.handleRequest(HttpHandlerImpl.java:266)
     at com.sap.engine.services.httpserver.server.RequestAnalizer.startServlet(RequestAnalizer.java:386)
     at com.sap.engine.services.httpserver.server.RequestAnalizer.startServlet(RequestAnalizer.java:364)
     at com.sap.engine.services.httpserver.server.RequestAnalizer.invokeWebContainer(RequestAnalizer.java:1039)
     at com.sap.engine.services.httpserver.server.RequestAnalizer.handle(RequestAnalizer.java:265)
     at com.sap.engine.services.httpserver.server.Client.handle(Client.java:95)
     at com.sap.engine.services.httpserver.server.Processor.request(Processor.java:175)
     at com.sap.engine.core.service630.context.cluster.session.ApplicationSessionMessageListener.process(ApplicationSessionMessageListener.java:33)
     at com.sap.engine.core.cluster.impl6.session.MessageRunner.run(MessageRunner.java:41)
     at com.sap.engine.core.thread.impl3.ActionObject.run(ActionObject.java:37)
     at java.security.AccessController.doPrivileged(AccessController.java:219)
     at com.sap.engine.core.thread.impl3.SingleThread.execute(SingleThread.java:102)
     at com.sap.engine.core.thread.impl3.SingleThread.run(SingleThread.java:172)
What should I do??

Hi Antonio,
Follow the below note for Jco related troubleshooting.
https://service.sap.com/sap/support/notes/919850
Are you able to see the 4 Jco connections green?
Regards,
Debasis.

Error while obtaing JCO connection

In Bussiness planning in portal. When i click Planning tab in Enterprise portal, its throwing an error that "error while obtaining JCO connection". I cant proceed furtherI
I am working in my own system.
I have checked many posts and i have done some JCO destinations as per the instructions but it's vain.
The detailed error is as follows;
500 Internal Server Error
Web Dynpro Container/SAP J2EE Engine/6.40
Failed to process request. Please contact your system administrator.
Error Summary
While processing the current request, an exception occured which could not be handled by the application or the framework.
If the information contained on this page doesn't help you to find and correct the cause of the problem, please contact your system administrator. To facilitate analysis of the problem, keep a copy of this error page. Hint: Most browsers allow to select all content, copy it and then paste it into an empty document (e.g. email or simple text file).
Root Cause
The initial exception that caused the request to fail, was:
com.sap.tc.webdynpro.services.exceptions.WDRuntimeException: ComponentUsage(CharRelInst): Active component must exist when getting interface controller. (Hint: Have you forgotten to create it with createComponent()? Should the lifecycle control of the component usage be "createOnDemand"?
at com.sap.tc.webdynpro.progmodel.components.ComponentUsage.ensureActiveComponent(ComponentUsage.java:773)
at com.sap.tc.webdynpro.progmodel.components.ComponentUsage.getInterfaceControllerInternal(ComponentUsage.java:348)
at com.sap.tc.webdynpro.progmodel.components.ComponentUsage.getInterfaceController(ComponentUsage.java:335)
at com.sap.ip.bi.plan.workbench.wdp.InternalInfoprovController.wdGetCharRelInstInterface(InternalInfoprovController.java:296)
at com.sap.ip.bi.plan.workbench.InfoprovController.checkSavable(InfoprovController.java:254)
... 48 more
please give some pointers like what needs to be done JCO settings in Backend.
Thanks in advance.

Niranjan,
3 causes and many more....
First and most probable cause is that your CR content in SLD is old....
FIX - to fix this download latest cimsap and crcontent from service.sap.com and implement in SLD.
Second cause user is locked
FIX - unlock in R/3
Third cause could be that the connection pool in JCO is exhausted.
FIX - increase connection pool in JCO.
More causes.
With this new version it appears that any error before connection is created ends up showing this, so I would really go into default trace and look there for original errors, that is the way I found JCO pool was exhausted, that error was not being forwarded and instead it was showing this error...
reward points if helpful

Class not found error while establishing a jco connection

Hi
I am trying to establish a JCo connection in Java class.
public static void main(String s[])
try {
...// set connection properties
               connClient.connect();
               } catch (Exception ex)
                    ex.printStackTrace();
                    System.exit(1);
It is throwing runtime error on line connClient.connect();
java.lang.NoClassDefFoundError
at com.sap.mw.jco.MiddlewareJRfc$Client.connect(MiddlewareJRfc.java:1079)
at com.sap.mw.jco.JCO$Client.connect(JCO.java:3256)

Hi Saurabh,
Please refer to below for calling JCo connection in Java class..
http://help.sap.com/saphelp_nw04/helpdata/en/b6/55e3952a902447847066a0df27b0d6/content.htm
http://help.sap.com/saphelp_nw04/helpdata/en/ed/89746bea5011d6b2e800508b6b8a93/content.htm
Hope it helps
Regards
Arun

Error while creating a JCO Connection

Hi i am trying to create a JCO Connection from sapj2ee engine
my problem is i am getting an error connection to msg server host failed ..
When i select the Message Server the System Name and Logon Group fields are disabled and cannot be modified and the problem is there is a default system name field already present there which remains there irrespective of whther i change
the msg server...
why is this happening...
regards
Nilesh Taunk.

Hi Nilesh,
exactly follow this link for the set up in Visual Admin..
http://help.sap.com/saphelp_nw04/helpdata/en/ea/cd2e807e0e45bf9da67354f452fc05/content.htm
then refer these forums also...
Re: Metadata problem
i have already explained in step by step setting up of SLD.. in thisforum... refer this also
Re: getting a BAPI from an R/3 system
Regards
Kishor Gopinathan

Error while trying to creat a RFC_METADATA JCo Connection to R/3 system

hi,
i have installed the EP . when i am trying to maintain the JCo connection for RFC_METADATA i am getting an error.
the error states : "com.sap.mw.jco.JCO$Exception: (102) RFC_ERROR_COMMUNICATION: Connect to message server host failed Connect_PM TYPE=B MSHOST=esuides GROUP=PUBLIC R3NAME=ESR MSSERV=sapmsESR PCS=1 ERROR Group PUBLIC not found TIME Fri Aug 26 14:46:24 2005 RELEASE 640 COMPONENT LG VERSION 5 RC -6 MODULE lgxx.c LINE 3515 DETAIL LgIGroup COUNTER 1"
cna you please tell me how to resolve this error.
thanks
-uday

Hi Uday,
you have to create a logon Group named PUBLIC with Transaction SMLG in your Backend system. Also don't forget to add the line:
sapmsXYZ <port_number on which XYZ listens>/tcp <For ex: 3600>
to your services file in C:\winNT\system32\drivers\etc (for the Windows 2000 system). XYZ means your Instance Name.
Regards
Gregor

Java-Program for JCO-Connection

Hallo experts!
I tried to get a Java-Program running which should establish JCO-Connection to a SAP-System and got the following error message:
java.lang.ExceptionInInitializerError: JCO.classInitialize(): Could not load middleware layer 'com.sap.mw.jco.rfc.MiddlewareRFC'
JCO.nativeInit(): Could not initialize dynamic link library librfc. Found version "640.0.144" but required at least version "640.0.161".
     at com.sap.mw.jco.JCO.<clinit>(JCO.java:776)
     at JCOTEST.main(JCOTEST.java:24)
Exception in thread "main"
Anyone got an idea?
Thanks for your help in advance.

Thank you Jens,
it worked fine with the newest JCo-Download.
Now I seem to have some Network problem: ip not reached:
com.sap.mw.jco.JCO$Exception: (102) RFC_ERROR_COMMUNICATION: Connect to SAP gateway failed
Connect_PM GWHOST=10.251.24.10, GWSERV=sapgw10, ASHOST=10.251.24.10, SYSNR=10
LOCATION    CPIC (TCP/IP) on local host
ERROR       partner not reached (host 10.251.24.10, service 3310)
I need to talk to our network manager in the firm.
Regards.
Thomas

Error in JCO Connection prorgam

Hi Experts,
I am developing one tomcat application using servlet. In servlet i am connecting to R/3. For this i am writing JCO Connection code. This Java file is compiled, but while running the servlet in browser it is giving exception like
java.lang.ExceptionInInitializerError: JCO.classInitialize(): Could not load middleware layer 'com.sap.mw.jco.rfc.MiddlewareRFC'
JCO.nativeInit(): Could not initialize dynamic link library sapjcorfc [no sapjcorfc in java.library.path]. java.library.path [C:Tomcat 5.0bin;.;C:WINDOWSsystem32;C:WINDOWS;C:WINDOWSsystem32;C:WINDOWS;C:WINDOWSSystem32Wbem;C:jdk1.5.0_12bin;C:Program Files (x86)AdobeFlex Builder 2Flex SDK 2bin;C:j2mej2me_cldcbinwin32;C:j2memidp1.0.3fcsbin;C:jdk1.5.0_12libsapjco.jar]
     com.sap.mw.jco.JCO.<clinit>(JCO.java:738)
     ConnectToR3.getConnection(ConnectToR3.java:25)
     HitServlet.doGet(HitServlet.java:29)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
How to slove this problem. Is their any other way to connect to SAP R/3 from Servlets. I created normal java program without servlets, it's wokring fine. But If paste the same code in servlets mean it is giving above Exception.
Please Help me........ Give any solution to this problem.
Regards,
Sunil

sapjcorfc.dll is required on the server to handle jco connections.
It seems it is not there or if it is there but is not part of "path" environment variable on the server.
1) Go to you server. Search for this file and add the directory containing this file to path environment variable for server. You have to restart your server.
2) It runs in your local java program because your local java program runs in local JVM instance. And on your local machine you have the sapjcorfc.dll plus its folder being in part of path environment variable.
3) The servlet runs in ServletContext on the server JVM instance where the sapjcorfc.dll cann't located.
Regards,
Ashwani Kr Sharma

Eror in JCo Connection

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