NullPointerException in WebLogic while accessing web service from client

Question

Hi all,
I have an SPML Web Service developed. The java class from WSDL was generated using wsdlc
<wsdlc srcWsdl="schema/oracle_ws_spmlv2.wsdl" destJwsDir="${classes.dir}" type="JAXWS" explode="true"/>
and then
<jwsc classpath="..." classpathref="wls.jars" srcdir="src/main" destdir="${classes.dir}" keepGenerated="yes">
<jws file="com/oracle/xmlns/idm/identity/webservice/spmlservice/SPMLService_SPMLServiceProviderSoapImpl.java" compiledWsdl="target/oracle_ws_spmlv2_wsdl.jar" type="JAXWS">
<WLHttpTransport contextPath="OIMSPMLWebService" serviceUri="${ear.deployed.name}" portName="SPMLServiceProviderSoap"/>
</jws>
</jwsc>
I have deployed the ear in WLS and generated the client classes.
<clientgen wsdl="http://${weblogic.host}:${weblogic.port}/OIMSPMLWebService/OIMspmlxsd?WSDL" destDir="${classes.dir}" type="JAXWS"/>
I run the client using java command from the terminal. First time, it runs fine. I get a valid response. But often, when I run it a second time, I get the following exception ... I need to undeploy and deploy the ear again. Any help will be appreciated!
Following error appears.
Error 500--Internal Server Error
java.lang.NullPointerException
at weblogic.wsee.jaxws.JAXWSDeployedServlet.init(JAXWSDeployedServlet.java:49)
at javax.servlet.GenericServlet.init(GenericServlet.java:241)
at weblogic.servlet.internal.StubSecurityHelper$ServletInitAction.run(StubSecurityHelper.java:283)
at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:121)
at weblogic.servlet.internal.StubSecurityHelper.createServlet(StubSecurityHelper.java:64)
at weblogic.servlet.internal.StubLifecycleHelper.createOneInstance(StubLifecycleHelper.java:58)
at weblogic.servlet.internal.StubLifecycleHelper.(StubLifecycleHelper.java:48)
at weblogic.servlet.internal.ServletStubImpl.prepareServlet(ServletStubImpl.java:521)
at weblogic.servlet.internal.ServletStubImpl.checkForReload(ServletStubImpl.java:452)
at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:232)
at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:26)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
at oracle.dms.wls.DMSServletFilter.doFilter(DMSServletFilter.java:202)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:3588)
at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:121)
at weblogic.servlet.internal.WebAppServletContext.securedExecute(WebAppServletContext.java:2200)
at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:2106)
at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1428)
at weblogic.work.ExecuteThread.execute(ExecuteThread.java:201)
at weblogic.work.ExecuteThread.run(ExecuteThread.java:173)

Answer 1

As a workaround I can start the application in debug mode, log into the Weblogic console and stop then restart the deployment and this issue goes away, sort of a pain but it does work.