JAXB 问题 -- 类......在此上下文中，其任何超类均未知

Question

这两天我一直在尝试解决这个问题，但没有成功！

我的 Web 服务以及客户端在我的机器上运行良好（我正在 Weblogic 10.3.2 上测试应用程序，与我们的 DEV 环境相同）。但每当我将应用程序部署到 DEV 时，都会出现以下异常。

我的假设是类加载器正在加载“旧”jar 文件，这些文件不支持我当前的应用程序代码，但我无法弄清楚如何解决这个问题。

我尝试了很多方法，从在我的ear文件中使用“prefer-application-packages”，到创建“endorsed”目录并将其包含在我的类路径中，但没有任何效果。 （我已将 axis2 和 jaxb jar 都包含在“endorsed”目录中）。

那里有人有任何可能的解决方案吗？我应该“覆盖”哪些 jar 文件？你认为这件事失败在哪里？

任何帮助表示赞赏！

开发配置：

Weblogic 10.3.2

java.version = 1.6.0_14

java.vm.info = compiled mode

java.vm.name = BEA JRockit(R)

java.home = /app/platform/jrockit/3.1.2/jre

java.class.path = /app/platform/jrockit/3.1.2/lib/endorsed/jaxb-impl-2.2.2.jar::/app/platform/wls/10.3.2/patch_wls1032/profiles/default/sys_manifest_classpath/weblogic_patch.jar:/app/platform/jrockit/3.1.2/lib/tools.jar:/app/platform/wls/10.3.2/utils/config/10.3/config-launch.jar:/app/platform/wls/10.3.2/wlserver_10.3/server/lib/weblogic_sp.jar:/app/platform/wls/10.3.2/wlserver_10.3/server/lib/weblogic.jar:/app/platform/wls/10.3.2/modules/features/weblogic.server.modules_10.3.2.0.jar:/app/platform/wls/10.3.2/wlserver_10.3/server/lib/webservices.jar:/app/platform/wls/10.3.2/modules/org.apache.ant_1.7.0/lib/ant-all.jar:/app/platform/wls/10.3.2/modules/net.sf.antcontrib_1.0.0.0_1-0b2/lib/ant-contrib.jar:/app/platform/wls/10.3.2/wlserver_10.3/common/eval/pointbase/lib/pbclient57.jar:/app/platform/wls/10.3.2/wlserver_10.3/server/lib/xqrl.jar

Caused By: javax.xml.bind.JAXBException: class com.comcast.cet.web.service.routing.lb.f5.impl.GetWipInfoForSpecificPoolMemberRequest nor any of its super class is known to this context.
        at com.sun.xml.bind.v2.runtime.JAXBContextImpl.getBeanInfo(JAXBContextImpl.java:605)
        at com.sun.xml.bind.v2.runtime.XMLSerializer.childAsRoot(XMLSerializer.java:486)
        at com.sun.xml.bind.v2.runtime.MarshallerImpl.write(MarshallerImpl.java:320)
        at com.sun.xml.bind.v2.runtime.MarshallerImpl.marshal(MarshallerImpl.java:249)
        at javax.xml.bind.helpers.AbstractMarshallerImpl.marshal(AbstractMarshallerImpl.java:75)
        at org.apache.axis2.datasource.jaxb.JAXBDSContext$1.run(JAXBDSContext.java:388)
        at org.apache.axis2.java.security.AccessController.doPrivileged(AccessController.java:76)
        at org.apache.axis2.datasource.jaxb.JAXBDSContext.marshalByElement(JAXBDSContext.java:369)
        at org.apache.axis2.datasource.jaxb.JAXBDSContext.marshal(JAXBDSContext.java:339)
        at org.apache.axis2.jaxws.message.databinding.impl.JAXBBlockImpl._outputFromBO(JAXBBlockImpl.java:189)
        at org.apache.axis2.jaxws.message.impl.BlockImpl.outputTo(BlockImpl.java:370)
        at org.apache.axis2.jaxws.message.impl.BlockImpl.serialize(BlockImpl.java:294)
        at org.apache.axiom.om.impl.llom.OMSourcedElementImpl.internalSerialize(OMSourcedElementImpl.java:691)
        at org.apache.axiom.om.impl.llom.OMElementImpl.internalSerialize(OMElementImpl.java:965)
        at org.apache.axiom.soap.impl.llom.SOAPEnvelopeImpl.serializeInternally(SOAPEnvelopeImpl.java:283)
        at org.apache.axiom.soap.impl.llom.SOAPEnvelopeImpl.internalSerialize(SOAPEnvelopeImpl.java:245)
        at org.apache.axiom.om.impl.llom.OMSerializableImpl.serializeAndConsume(OMSerializableImpl.java:193)
        at org.apache.axis2.transport.http.SOAPMessageFormatter.writeTo(SOAPMessageFormatter.java:79)
        at org.apache.axis2.transport.http.AxisRequestEntity.writeRequest(AxisRequestEntity.java:84)
        at org.apache.commons.httpclient.methods.EntityEnclosingMethod.writeRequestBody(EntityEnclosingMethod.java:499)
        at org.apache.commons.httpclient.HttpMethodBase.writeRequest(HttpMethodBase.java:2114)
        at org.apache.commons.httpclient.HttpMethodBase.execute(HttpMethodBase.java:1096)
        at org.apache.commons.httpclient.HttpMethodDirector.executeWithRetry(HttpMethodDirector.java:398)
        at org.apache.commons.httpclient.HttpMethodDirector.executeMethod(HttpMethodDirector.java:171)
        at org.apache.commons.httpclient.HttpClient.executeMethod(HttpClient.java:397)
        at org.apache.commons.httpclient.HttpClient.executeMethod(HttpClient.java:346)
        at org.apache.axis2.transport.http.AbstractHTTPSender.executeMethod(AbstractHTTPSender.java:557)
        at org.apache.axis2.transport.http.HTTPSender.sendViaPost(HTTPSender.java:199)
        at org.apache.axis2.transport.http.HTTPSender.send(HTTPSender.java:76)
        at org.apache.axis2.transport.http.CommonsHTTPTransportSender.writeMessageWithCommons(CommonsHTTPTransportSender.java:400)
        at org.apache.axis2.transport.http.CommonsHTTPTransportSender.invoke(CommonsHTTPTransportSender.java:225)
        at org.apache.axis2.engine.AxisEngine.send(AxisEngine.java:438)
        at org.apache.axis2.description.OutInAxisOperationClient.send(OutInAxisOperation.java:402)
        at org.apache.axis2.description.OutInAxisOperationClient.executeImpl(OutInAxisOperation.java:229)
        at org.apache.axis2.client.OperationClient.execute(OperationClient.java:165)
        at org.apache.axis2.jaxws.core.controller.impl.AxisInvocationController.execute(AxisInvocationController.java:554)
        at org.apache.axis2.jaxws.core.controller.impl.AxisInvocationController.doInvoke(AxisInvocationController.java:118)
        at org.apache.axis2.jaxws.core.controller.impl.InvocationControllerImpl.invoke(InvocationControllerImpl.java:82)
        at org.apache.axis2.jaxws.client.proxy.JAXWSProxyHandler.invokeSEIMethod(JAXWSProxyHandler.java:317)
        at org.apache.axis2.jaxws.client.proxy.JAXWSProxyHandler.invoke(JAXWSProxyHandler.java:159)
        at $Proxy84.getWipInfoForSpecificPoolMember(Unknown Source)
        at com.comcast.cet.web.service.routing.lb.LoadBalancerMain.getWipInfoForPoolMember(LoadBalancerMain.java:73)
        at com.comcast.cet.web.controllers.rpc.RoutingServiceImpl.getWipInfoForSpecificFarm(RoutingServiceImpl.java:157)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:562)
        at com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:544)
        at com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:504)
        at com.comcast.cet.web.controllers.rpc.RoutingServiceRpcController.processCall(RoutingServiceRpcController.java:64)
        at com.google.gwt.user.server.rpc.RemoteServiceServlet.processPost(RemoteServiceServlet.java:243)
        at com.google.gwt.user.server.rpc.AbstractRemoteServiceServlet.doPost(AbstractRemoteServiceServlet.java:62)
        at com.comcast.cet.web.controllers.rpc.RoutingServiceRpcController.handleRequest(RoutingServiceRpcController.java:41)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod(HandlerMethodInvoker.java:176)
        at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:426)
        at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:414)
        at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:790)
        at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:719)
        at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:644)
        at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:560)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
        at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:227)
        at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:125)
        at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:292)
        at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:26)
        at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
        at weblogic.servlet.internal.RequestEventsFilter.doFilter(RequestEventsFilter.java:27)
        at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
        at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:3592)
        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:2202)
        at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:2108)
        at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1432)
        at weblogic.work.ExecuteThread.execute(ExecuteThread.java:201)
        at weblogic.work.ExecuteThread.run(ExecuteThread.java:173)

Answer 1

好吧，如果您在 weblogic 或 websphere 上运行代码（我使用的是前者），快速解决方案就是从 Axis2 切换到 Apache CXF。原因是这些应用程序服务器将 axis 捆绑到它们的 RTE 中，因此当您的托管服务器启动时，首先读取与 weblogic 捆绑的 axis 库，而不是您的 axis 库。您可以使用许多“技巧”来完成这项工作：

1. 从“war”包迁移到“ear”包并利用“prefer-application-packages”功能
2. 创建“endorsed”目录并上传你的 jar 文件 还有
3. 其他选项可用，但太复杂，无法清晰地拼写出来

在上述所有情况下，代码仍然无法正常运行，所以我认为合适的唯一选项是从 axis2 切换到 cxf，这不被 weblogic 捆绑，因此没有“干扰”！如果您使用的是 weblogic，则必须将以下内容添加到服务器“启动”选项中：

-Djavax.xml.soap.MessageFactory=com.sun.xml.internal.messaging.saaj.soap.ver1_1.SOAPMessageFactory1_1Impl

这是 weblogic 中的一个已知问题。

这是我必须包含的 cxf maven 依赖项（我删除了所有的 axis 和 axiom 依赖项）

    
        org.apache.cxf
        cxf-rt-frontend-jaxws
        ${cxf.version}
    
    
        org.apache.cxf
        cxf-rt-transports-http
        ${cxf.version}
    
        
    
        org.apache.cxf
        cxf-rt-transports-http-jetty
        ${cxf.version}