Weblogic 12c Web Service NullPointerException

Question

For some reason the invocation of Web Service throws NullPointerException on my local Weblogic 12c installation. The same package works correctly on another instance of Weblogic 12c, so there must be something wrong on my weblogic configuration or server/java startup parameters. However, I couldn't figure out what's the difference, and server log message doesn't help at all. Of course we are using same JRE and classpath libraries also.

Here is the exception

####<8.8.2017, 2:10:53,106 ip. EEST> <Error> <com.sun.xml.ws.server.sei.TieHandler> <IT-V-R90HKRNH> <is-mansrv> <[ACTIVE] ExecuteThread: '6' for queue: 'weblogic.kernel.Default (self-tuning)'> <HekoPassi> <> <46eb29b8-cb8a-44a9-94ed-e223acc07388-0000005d> <1502190653106> <[severity-value: 8] [rid: 0] [partition-id: 0] [partition-name: DOMAIN] > <BEA-000000> <null
java.lang.NullPointerException
    at weblogic.ejb.container.internal.BaseWSLocalObject.__WL_preInvoke(BaseWSLocalObject.java:85)
    at com.foo.bar.service.sessionfacade.SessionFacadeBean_afdkf0_WSOImpl.__WL_getPublicKey_WS_preInvoke(Unknown Source)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at weblogic.wsee.server.ejb.WsEjb.preInvoke(WsEjb.java:50)
    at weblogic.wsee.jaxws.WLSEjbInstanceResolver$WLSEjbInvoker.invoke(WLSEjbInstanceResolver.java:193)
    at weblogic.wsee.jaxws.WLSInstanceResolver$WLSInvoker.invoke(WLSInstanceResolver.java:93)
    at com.sun.xml.ws.server.InvokerTube$2.invoke(InvokerTube.java:149)
    at com.sun.xml.ws.server.sei.SEIInvokerTube.processRequest(SEIInvokerTube.java:88)
    at com.sun.xml.ws.api.pipe.Fiber.__doRun(Fiber.java:1136)
    at com.sun.xml.ws.api.pipe.Fiber._doRun(Fiber.java:1050)
    at com.sun.xml.ws.api.pipe.Fiber.doRun(Fiber.java:1019)
    at com.sun.xml.ws.api.pipe.Fiber.runSync(Fiber.java:877)
    at com.sun.xml.ws.server.WSEndpointImpl$2.process(WSEndpointImpl.java:419)
    at com.sun.xml.ws.transport.http.HttpAdapter$HttpToolkit.handle(HttpAdapter.java:868)
    at com.sun.xml.ws.transport.http.HttpAdapter.handle(HttpAdapter.java:422)
    at com.sun.xml.ws.transport.http.servlet.ServletAdapter.handle(ServletAdapter.java:169)
    at weblogic.wsee.jaxws.WLSServletAdapter.handle(WLSServletAdapter.java:229)
    at weblogic.wsee.jaxws.HttpServletAdapter$AuthorizedInvoke.run(HttpServletAdapter.java:667)
    at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:368)
    at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:163)
    at weblogic.wsee.util.ServerSecurityHelper.authenticatedInvoke(ServerSecurityHelper.java:108)
    at weblogic.wsee.jaxws.HttpServletAdapter$3.run(HttpServletAdapter.java:286)
    at weblogic.wsee.jaxws.HttpServletAdapter.post(HttpServletAdapter.java:295)
    at weblogic.wsee.jaxws.JAXWSServlet.doRequest(JAXWSServlet.java:128)
    at weblogic.servlet.http.AbstractAsyncServlet.service(AbstractAsyncServlet.java:103)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
    at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:286)
    at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:260)
    at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:137)
    at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:350)
    at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:247)
    at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.wrapRun(WebAppServletContext.java:3679)
    at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:3649)
    at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:326)
    at weblogic.security.service.SecurityManager.runAsForUserCode(SecurityManager.java:197)
    at weblogic.servlet.provider.WlsSecurityProvider.runAsForUserCode(WlsSecurityProvider.java:203)
    at weblogic.servlet.provider.WlsSubjectHandle.run(WlsSubjectHandle.java:71)
    at weblogic.servlet.internal.WebAppServletContext.doSecuredExecute(WebAppServletContext.java:2433)
    at weblogic.servlet.internal.WebAppServletContext.securedExecute(WebAppServletContext.java:2281)
    at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:2259)
    at weblogic.servlet.internal.ServletRequestImpl.runInternal(ServletRequestImpl.java:1691)
    at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1651)
    at weblogic.servlet.provider.ContainerSupportProviderImpl$WlsRequestExecutor.run(ContainerSupportProviderImpl.java:270)
    at weblogic.invocation.ComponentInvocationContextManager._runAs(ComponentInvocationContextManager.java:348)
    at weblogic.invocation.ComponentInvocationContextManager.runAs(ComponentInvocationContextManager.java:333)
    at weblogic.work.LivePartitionUtility.doRunWorkUnderContext(LivePartitionUtility.java:54)
    at weblogic.work.PartitionUtility.runWorkUnderContext(PartitionUtility.java:41)
    at weblogic.work.SelfTuningWorkManagerImpl.runWorkUnderContext(SelfTuningWorkManagerImpl.java:640)
    at weblogic.work.ExecuteThread.execute(ExecuteThread.java:406)
    at weblogic.work.ExecuteThread.run(ExecuteThread.java:346)

Any idea what may cause this exception (or how I can debug it, seems like the exception is thrown from a dynamic proxy generated by weblogic, before the control even goes to implementation class). Can I make the exception more verbose? May this be an security issue? But then again, nothing in the stacktrace indicates that. Also, there are no exceptions in deployment log.

Answer 1

Hope this helps :

(from MOSC(My Oracle Support Community) java.lang.NullPointerException: com.sun.xml.ws.spi.db.JAXBWrapperAccessor.getPropertyAccessor When Deploying WebService (Doc ID 2207272.1))

APPLIES TO:

Oracle WebLogic Server - Version 12.1.1.0 to 12.2.1.2.0 [Release 12c] Information in this document applies to any platform.

SYMPTOMS

When attempting to deploying a webservice application with the below sample code snippet,

@WebService
public interface HelloServiceInterface {
@WebMethod
@RequestWrapper(className = "hello.HelloRequest")
public String hello(@WebParam(name = "names") List<String> names);

the following error occurs:

java.lang.NullPointerException: at com.sun.xml.ws.spi.db.JAXBWrapperAccessor.getPropertyAccessor(JAXBWrapperAccessor.java:261) at com.sun.xml.ws.db.toplink.JAXBContextWrapper.getElementPropertyAccessor(JAXBContextWrapper.java:170) at com.sun.xml.ws.server.sei.EndpointArgumentsBuilder$DocLit.(EndpointArgumentsBuilder.java:598) at com.sun.xml.ws.server.sei.TieHandler.createArgumentsBuilder(TieHandler.java:143) at com.sun.xml.ws.server.sei.TieHandler.(TieHandler.java:115) at com.sun.xml.ws.db.DatabindingImpl.(DatabindingImpl.java:118) at com.sun.xml.ws.db.DatabindingProviderImpl.create(DatabindingProviderImpl.java:74) at com.sun.xml.ws.db.DatabindingProviderImpl.create(DatabindingProviderImpl.java:58) at com.sun.xml.ws.db.DatabindingFactoryImpl.createRuntime(DatabindingFactoryImpl.java:120) at com.sun.xml.ws.server.EndpointFactory.createSEIModel(EndpointFactory.java:521) at com.sun.xml.ws.server.EndpointFactory.create(EndpointFactory.java:300) at com.sun.xml.ws.server.EndpointFactory.createEndpoint(EndpointFactory.java:164) at com.sun.xml.ws.api.server.WSEndpoint.create(WSEndpoint.java:577) at com.sun.xml.ws.api.server.WSEndpoint.create(WSEndpoint.java:560) at com.sun.xml.ws.api.server.WSEndpoint.create(WSEndpoint.java:639) at weblogic.wsee.jaxws.JAXWSDeployedServlet.getEndpoint(JAXWSDeployedServlet.java:355) at weblogic.wsee.jaxws.JAXWSServlet.registerEndpoint(JAXWSServlet.java:167) at weblogic.wsee.jaxws.JAXWSServlet.init(JAXWSServlet.java:79) at weblogic.wsee.jaxws.JAXWSDeployedServlet.init(JAXWSDeployedServlet.java:91) at javax.servlet.GenericServlet.init(GenericServlet.java:244)

CAUSE

This is a known issue with Eclipselink MOXy provider. XmlElementWrapper annotation ignored. The issue is reported in Bug:16685902 [ https://support.oracle.com/epmos/faces/BugDisplay?parent=DOCUMENT&sourceId=2207272.1&id=16685902 ] - WEBSERVICE PARAMETER LIST GIVES NULLPOINTEREXCEPTION AT DEPLOYMENT.

SOLUTION

Apply Patch 16685902 [ https://support.oracle.com/epmos/faces/ui/patch/PatchDetail.jspx?parent=DOCUMENT&sourceId=2207272.1&patchId=16685902 ] to WebLogic Server 12.1.1. As a workaround, avoid using Eclipselink MOXy provider in WebLogic by doing below:

set PRE_CLASSPATH=%WLS%\modules\databinding.override_1.0.0.0.jar

REFERENCES

BUG:16685902 [ https://support.oracle.com/epmos/faces/BugDisplay?parent=DOCUMENT&sourceId=2207272.1&id=16685902 ] - WEBSERVICE PARAMETER LIST GIVES NULLPOINTEREXCEPTION AT DEPLOYMENT