Webdynpro error: java.lang.NullPointerException in Runtime

[Former Member]

Hello Everyone.

I developed a webdynpro application with some RFC´S o i got the next exception in runtime, does anybody know the cause of this error?.

Thanks for your help.

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:

java.lang.NullPointerException

at com.comcel.consultas.components.ConsultaDispPospagoStartView.onActiongo(ConsultaDispPospagoStartView.java:238)

at com.comcel.consultas.components.wdp.InternalConsultaDispPospagoStartView.wdInvokeEventHandler(InternalConsultaDispPospagoStartView.java:320)

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

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:1.8.1.2) Gecko/20070219 Firefox/2.0.0.2

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: 7.0009.20060804145649.0000 (release=645_VAL_REL, buildtime=2006-08-05:15:08:24[UTC], changelist=413534, host=pwdfm101), build date: Sun Oct 15 01:29:51 GMT-05:00 2006

J2EE Engine 7.00 patchlevel

Java VM Java HotSpot(TM) 64-Bit Server VM, version:1.4.2_12-b03, vendor: Sun Microsystems Inc.

Operating system Windows 2003, version: 5.2, architecture: amd64

Session & Other

Session Locale en_US

Time of Failure Thu Mar 01 10:59:49 GMT-05:00 2007 (Java Time: 1172764789979)

Web Dynpro Code Generation Infos

local/Consultas

SapDictionaryGenerationCore 7.0006.20051128142640.0000 (release=645_VAL_REL, buildtime=2006-01-14:14:59:42[UTC], changelist=378068, host=PWDFM101.wdf.sap.corp)

SapDictionaryGenerationTemplates (unknown)

SapGenerationFrameworkCore 7.0006.20050713144242.0000 (release=645_VAL_REL, buildtime=2006-01-14:14:48:59[UTC], changelist=357697, host=PWDFM101.wdf.sap.corp)

SapIdeWebDynproCheckLayer 7.0006.20051128151834.0000 (release=645_VAL_REL, buildtime=2006-01-14:15:05:10[UTC], changelist=378108, host=PWDFM101.wdf.sap.corp)

SapMetamodelCommon 7.0006.20050929162929.0000 (release=645_VAL_REL, buildtime=2006-01-14:14:49:45[UTC], changelist=369752, host=PWDFM101.wdf.sap.corp)

SapMetamodelCore 7.0006.20050929162929.0000 (release=645_VAL_REL, buildtime=2006-01-14:14:49:38[UTC], changelist=369752, host=PWDFM101.wdf.sap.corp)

SapMetamodelDictionary 7.0006.20051128142655.0000 (release=645_VAL_REL, buildtime=2006-01-14:14:57:39[UTC], changelist=378069, host=PWDFM101.wdf.sap.corp)

SapMetamodelWebDynpro 7.0006.20051128151854.0000 (release=645_VAL_REL, buildtime=2006-01-14:15:02:09[UTC], changelist=378109, host=PWDFM101.wdf.sap.corp)

SapWebDynproGenerationCTemplates 7.0006.20060111154644.0000 (release=645_VAL_REL, buildtime=2006-01-14:15:18:33[UTC], changelist=384368, host=pwdfm101)

SapWebDynproGenerationCore 7.0006.20051128151834.0000 (release=645_VAL_REL, buildtime=2006-01-14:15:05:21[UTC], changelist=378108, host=PWDFM101.wdf.sap.corp)

SapWebDynproGenerationTemplates 7.0006.20060111154644.0000 (release=645_VAL_REL, buildtime=2006-01-14:15:18:33[UTC], changelist=384368, host=pwdfm101)

sap.com/tc_wddispwda

No information available null

sap.com/tc_wdcorecomp

No information available null

Detailed Error Information

Detailed Exception Chain

java.lang.NullPointerException

at com.comcel.consultas.components.ConsultaDispPospagoStartView.onActiongo(ConsultaDispPospagoStartView.java:238)

at com.comcel.consultas.components.wdp.InternalConsultaDispPospagoStartView.wdInvokeEventHandler(InternalConsultaDispPospagoStartView.java:320)

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)

at com.sap.tc.webdynpro.clientserver.window.WindowPhaseModel.processRequest(WindowPhaseModel.java:132)

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:299)

at com.sap.tc.webdynpro.clientserver.session.ClientSession.doApplicationProcessingStandalone(ClientSession.java:711)

at com.sap.tc.webdynpro.clientserver.session.ClientSession.doApplicationProcessing(ClientSession.java:665)

at com.sap.tc.webdynpro.clientserver.session.ClientSession.doProcessing(ClientSession.java:232)

at com.sap.tc.webdynpro.clientserver.session.RequestManager.doProcessing(RequestManager.java:152)

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: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:100)

at com.sap.engine.core.thread.impl3.SingleThread.run(SingleThread.java:170)

[Former Member]

Finally the problem was solved changing the jco configuration.

[Former Member]

Finally the problem was solved changing the jco configuration.

[former_member4529]

Hi,

Please check line 238 of ConsultaDispPospagoStartView (onActiongo method) in your web dynpro application. There you may have called a method of an object which is null at runtime. Better if you can paste the code of that part here.

Thanks,

Dipankar

[Former Member]

Hi.

Firstable thanks for your help, i do not think is a problem in the code because if i try again with the same data the application brings result data, we changed the jco configuration and it seems that resolved the problem, we are testing,

The initial configuation was:

Maximum Pool Size: 20

Maximum Connections: 40

Connection Timout (sec.): 20

Maximum Waiting Time (sec.):40

the new configuration is:

Maximum Pool Size: 30

Maximum Connections: 100

Connection Timout (sec.): 0

Maximum Waiting Time (sec.):10000

[Former Member]

Hi -

Did the JCO changes work for you.

We have a similar java Null Pointer Exception error (at com.company.caf.eu.gp.ui.pt.create.PRCreate.onActionSubmit(PRCreate.java:146)).

We are thinking to make similar changes on our side as well.

Please keep us apprised on your progress.

Thanks

Shahid

[Former Member]

Hi Shahid.

Since we made that change it´s been working well i would recommend you to do the same because i dicard any error at the code.

I hope it solve your error.