WebLogic12c网络服务NullPointerException

Question

由于某些原因，Web Service的调用在我本地的WebLogic12c安装上抛出了NullPointerException。相同的包在另一个WebLogic12c实例上工作正常，所以我的Weblogic配置或服务器/java启动参数一定有问题。但是，我不知道有什么不同，服务器日志消息也没有任何帮助。当然，我们也在使用相同的JRE和类路径库。

以下是例外情况

####<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)

任何可能导致此异常的想法(或者我如何调试它，似乎异常是从weblogic生成的动态代理抛出的，甚至在控件进入实现类之前)。我可以让异常变得更详细吗？这可能是一个安全问题吗？但话又说回来，堆栈跟踪中没有任何内容表明这一点。此外，部署日志中也没有异常。

Answer 1

希望这能有所帮助：

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

APPLIES TO:

Oracle WebLogic服务器-版本12.1.1.0到12.2.1.2.0发行版12c本文档中的信息适用于任何平台。

SYMPTOMS

当尝试使用以下示例代码片段部署When服务应用程序时，

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

出现以下错误：

在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的

java.lang.NullPointerExceptioncom.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:的.TieHandler(TieHandler.java:115)521)在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)在weblogic.wsee.jaxws.JAXWSDeployedServlet.getEndpoint(JAXWSDeployedServlet.java:355)在weblogic.wsee.jaxws.JAXWSServlet.registerEndpoint(JAXWSServlet.java:167)在weblogic.wsee.jaxws.JAXWSServlet.init(JAXWSServlet.java:79)在weblogic.wsee.jaxws.JAXWSDeployedServlet.init(JAXWSDeployedServlet.java:91)在javax.servlet.GenericServlet.init(GenericServlet.java:244)

CAUSE

这是Eclipselink MOXy提供程序的一个已知问题。已忽略XmlElementWrapper批注。该问题在错误:16685902[ https://support.oracle.com/epmos/faces/BugDisplay?parent=DOCUMENT&sourceId=2207272.1&id=16685902 ]中报告- WEBSERVICE参数列表提供NULLPOINTEREXCEPTION AT部署。

SOLUTION

将修补程序16685902 [ https://support.oracle.com/epmos/faces/ui/patch/PatchDetail.jspx?parent=DOCUMENT&sourceId=2207272.1&patchId=16685902 ]应用到WebLogic服务器12.1.1。作为一种解决方法，请通过执行以下操作来避免在WebLogic中使用Eclipselink MOXy提供程序：

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

REFERENCES

错误:16685902[ https://support.oracle.com/epmos/faces/BugDisplay?parent=DOCUMENT&sourceId=2207272.1&id=16685902 ]- WEBSERVICE参数列表在DEPLOYMENT

提供NULLPOINTEREXCEPTION

Answer 2

这是不必要的错误提到的。该错误已从12.1.3版本开始解决

前面提到的变通方法是可行的(更改JAXB提供程序)，但是在PRE_CLASSPATH变量中进行硬编码是一个糟糕的解决方案(可能仅适用于开发环境)。

WebLogic12.1.1版本将默认JAXB provider从Glassfish RI更改为Eclipse，然后您可以再次使用Glassfish配置MOXy服务提供者接口( Service Provider Interface )。

https://docs.oracle.com/middleware/1213/wls/WSGET/jax-ws-datatypes.htm#WSGET345

这样你就可以看到真正的根本原因了。在我们的例子中，这是一个关于重复类的问题(使用JAXB创建，具有不同的属性，但具有相同的包/名称空间)。