NullPointerException when trying to run code generated by wsdl2java

Question

I am trying to build a WS client using Apache CXF 2.7.11. I created the sample classes using wsdl2java tool. I have a Eclipse project with:

• all the code generated by wsdl2java
• all the jar files from /lib installed.

I am basically following this tutorial: http://cxf.apache.org/docs/developing-a-consumer.html

When I run the sample code created by wsdl2java, I get this error:

Exception in thread "main" java.lang.NullPointerException
at org.apache.cxf.wsdl11.WSDLServiceFactory.<init>(WSDLServiceFactory.java:98)
at org.apache.cxf.jaxws.ServiceImpl.initializePorts(ServiceImpl.java:204)
at org.apache.cxf.jaxws.ServiceImpl.<init>(ServiceImpl.java:149)
at org.apache.cxf.jaxws.spi.ProviderImpl.createServiceDelegate(ProviderImpl.java:101)
at javax.xml.ws.Service.<init>(Service.java:67)
at com.twinfield.Session.<init>(Session.java:46)
at com.twinfield.SessionSoap_SessionSoap_Client.main(SessionSoap_SessionSoap_Client.java:48)

Using the debugger, I found out that the null in question is caused by CXFBusImpl.getExtension(WSDLManager.class). Line 98 in WSDLServiceFactory.java reads:

definition = getBus().getExtension(WSDLManager.class).getDefinition(url);

I thought that the problem was with my wsdl location, but based on above that might not be the case? I have tried both local file and an URL as a value to the -wsdlLocation switch of wsdl2java. (Currently I don't use that parameter at all)

Web searches turned up only some very old problems with version 2.0 and 2.4. There is a similar question here: Null Pointer Exception in WSDServiceFactory - Apache CXF libs , but the answer was just to use an old version...

Could this be a configuration problem? Do I need any configuration files in my project?

Answer 1

This error was apparently caused by incompatible library versions. It seems that at least the WS client code generated by wsdl2java can run in Domino 9.0.1 without adding any jars from CXF (I had added some jars to the project).