JCO classpath issue on WAS

[Former Member]

Hello all,

I have done a little JCO program that is connecting to an ABAP function module and getting information from existing business logic in R3.

I am working with a track development model (refer to sap help).The track consist of one software component that depends of

SAP J2EE ENGINE <Release> (SAP J2EE ENGINE 6.40)

SAP BUILD TOOL <Release> (JDI BUILD TOOL 6.40)

SAP JAVA TECH SERVICES <Release> (SAP JAVA TECH SERVICES 6.40)

I have done a container (EAR file) that contains a web apps (WAR file). This war file is having a small servlet that tests the java code to access the ABAP stack. In order for it to work, I declared the following component usage (in my web apps)

Name com.sap.aii.proxy.framework

Name com.sap.aii.util.misc

Name com.sap.mdi

Name com.sap.mw.jco

Name jdbc20

Name ejb20

Name jms

Name servlet

Name tc/logging

I have tested my application in netweaver developer studio and everything work fine except that I have to modify the classpath because apparently JRFC is only working on the WAS server.

When I tried to test it on my local WAS installation in a JSP page (calling same class files as in Netweaver), I am getting the following error message:

java.lang.NoClassDefFoundError: com/sap/mw/jco/JCO The ID of this error is

Exception id: [44455354420000470000003D00000D0000040359079DF5CF].

My system fingerprint is available at the end of this message.

The default trace file only shows me the same information but provide the same stack trace.

When looking in the SLD, SAP JAVA TECH SERVICES 6.40 should contain all the required libraries.

Can someone help? Again this is in the concept of track development.

Antoine

=============================================================================

System Fingerprint

JVM and Server Version

Servlet Engine SAP J2EE Engine/6.40 PatchLevel 95420.313 2 3

Java VM Sun Microsystems Inc. Java HotSpot(TM) Server VM 1.4.2_08-b03

Java RE Sun Microsystems Inc. 1.4.2_08

Platform Windows XP x86 5.1

Boot jars

rt.jar 26508344 Fri Mar 04 19:08:15 CET 2005

sunrsasign.jar 89343 Fri Apr 15 14:52:23 CEST 2005

jsse.jar 901949 Fri Mar 04 19:08:20 CET 2005

jce.jar 69571 Fri Mar 04 17:42:22 CET 2005

charsets.jar 5896381 Fri Mar 04 19:09:40 CET 2005

Only valid on a sun jvm

System jars

jstartup.jar 27532 Wed Jul 13 01:27:55 CEST 2005

boot.jar 80993 Thu Oct 06 13:40:01 CEST 2005

jaas.jar 104195 Thu Oct 06 13:40:01 CEST 2005

bytecode.jar 489758 Thu Oct 06 13:40:53 CEST 2005

Extra system jars

dnsns.jar 8896 Fri Mar 04 18:24:06 CET 2005

ldapsec.jar 53248 Fri Mar 04 18:29:08 CET 2005

localedata.jar 769342 Fri Mar 04 19:09:51 CET 2005

sunjce_provider.jar 111430 Fri Mar 04 17:42:22 CET 2005

Webapp jars

axis-ant.jar 385010 Mon Oct 17 18:00:02 CEST 2005

axis.jar 1235721 Mon Oct 17 18:00:03 CEST 2005

commons-discovery.jar 71442 Mon Oct 17 18:00:03 CEST 2005

commons-logging.jar 31605 Mon Oct 17 18:00:03 CEST 2005

dom.jar 42153 Mon Oct 17 18:00:01 CEST 2005

jakarta-oro.jar 78909 Mon Oct 17 18:00:01 CEST 2005

jax-qname.jar 3361 Mon Oct 17 18:00:01 CEST 2005

jaxb-api.jar 77761 Mon Oct 17 18:00:01 CEST 2005

jaxb-impl.jar 310058 Mon Oct 17 18:00:01 CEST 2005

jaxb-libs.jar 1672391 Mon Oct 17 18:00:01 CEST 2005

jaxb-xjc.jar 3290054 Mon Oct 17 18:00:01 CEST 2005

jaxp-api.jar 46883 Mon Oct 17 18:00:01 CEST 2005

jaxrpc.jar 35759 Mon Oct 17 18:00:03 CEST 2005

log4j-1.2.8.jar 352668 Mon Oct 17 18:00:03 CEST 2005

namespace.jar 1911 Mon Oct 17 18:00:01 CEST 2005

relaxngDatatype.jar 23497 Mon Oct 17 18:00:01 CEST 2005

RUC.jar 100833 Mon Oct 17 18:00:01 CEST 2005

saaj.jar 18501 Mon Oct 17 18:00:03 CEST 2005

sax.jar 54121 Mon Oct 17 18:00:01 CEST 2005

wsdl4j.jar 113853 Mon Oct 17 18:00:03 CEST 2005

xalan.jar 7249748 Mon Oct 17 18:00:02 CEST 2005

xercesImpl.jar 3070817 Mon Oct 17 18:00:02 CEST 2005

xsdlib.jar 442983 Mon Oct 17 18:00:02 CEST 2005

[Former Member · Accepted solution]

Hi Antoine,

You need to make reference of all these jars in your Enterprise application project (EAR project) under application-j2ee-engine.xml. This is required for the reference at runtime at server side.

Regards,

Bhavik

[Former Member · Accepted solution]

Hello,

Thanks.

How do I make reference of all these jars in your Enterprise application project (EAR project) under application-j2ee-engine.xml.

If I declare all of them as dependencies in the EAR file and in the WAR file (they already exist there). I am getting circular dependencies and build is failing.

If I add the reference to those libs to the application-j2ee-engine.xml directly, I am losing some of the benefits of the track development model because I have to know this fine grained details.

Do you know if that's documented somewhere in the SAP help.

Thanks

Antoine

[Former Member · Accepted solution]

Hi Antoine,

I guess you have added these jars in EJB project as external jars in project properties-> java buildpath.

Uncheck in order and export tab if thery are checked.

Now, goto your application project(EAR) there double click on Application-j2ee-engine.xml file. There click on add button, new popup comes there select "select libray/interface/services". It will show all libraries. Here, select your required libraries and choose ok.

These references are required at runtime, whereas references made in EJB project are used at design time.

Regards,

Bhavik

[Former Member]

It works now.

I had to add the reference in the application-j2ee-engine.xml file and that's all.

Antoine