应用程序在Tomcat上运行一切正常，但在websphere上部署时报以下错误：
错误 500
处理请求时发生一个错误： /admin/upload.do
消息： WEB-INF/web.xml
详细错误信息为：
com.ibm.etools.archive.exception.DeploymentDescriptorLoadException: WEB-INF/web.xml
嵌套异常的堆栈跟踪：
com.ibm.etools.archive.exception.ResourceLoadException: IWAE0007E 未能在归档“C:Program FilesWebSphereAppServerwstempadminupload
ewiweb.war”中装入资源“WEB-INF/web.xml”
嵌套异常的堆栈跟踪：
com.ibm.etools.j2ee.exception.WrappedRuntimeException: IWAE0099E 分析 xml：行号：138：列号：11 时发生了异常
嵌套异常的堆栈跟踪：
org.xml.sax.SAXParseException: 元素类型“web-app”的内容必须匹配“(icon?,display-name?,description?,distributable?,context-param*,filter*,filter-mapping*,listener*,servlet*,servlet-mapping*,session-config?,mime-mapping*,welcome-file-list?,error-page*,taglib*,resource-env-ref*,resource-ref*,security-constraint*,login-config?,security-role*,env-entry*,ejb-ref*,ejb-local-ref*)”。
at org.apache.xerces.parsers.DOMParser.parse(DOMParser.java:235)
at org.apache.xerces.jaxp.DocumentBuilderImpl.parse(DocumentBuilderImpl.java:209)
at com.ibm.etools.j2ee.xml.bridge.GeneralXmlDocumentReader.parse(GeneralXmlDocumentReader.java:198)
at com.ibm.etools.j2ee.xml.bridge.GeneralXmlDocumentReader.parseDocument(GeneralXmlDocumentReader.java:221)
at com.ibm.etools.j2ee.xml.DeploymentDescriptorImportExport.primImportFrom(DeploymentDescriptorImportExport.java:250)
at com.ibm.etools.j2ee.xml.DeploymentDescriptorImportExport.primImportFrom(DeploymentDescriptorImportExport.java:239)
at com.ibm.etools.j2ee.xml.WarDeploymentDescriptorImportExport.importFrom(WarDeploymentDescriptorImportExport.java:56)
at com.ibm.etools.webapplication.impl.WebAppResourceFactory.importXML(WebAppResourceFactory.java:30)
at com.ibm.etools.j2ee.common.impl.XMLResourceFactory.load(XMLResourceFactory.java:68)
at com.ibm.etools.j2ee.common.impl.XMLResourceFactory.load(XMLResourceFactory.java:84)
at com.ibm.etools.emf.resource.impl.ResourceFactoryImpl.load(ResourceFactoryImpl.java:77)
at com.ibm.etools.emf.resource.impl.ResourceSetImpl.load(ResourceSetImpl.java:289)
at com.ibm.etools.archive.impl.LoadStrategyImpl.getMofResource(LoadStrategyImpl.java:222)
at com.ibm.etools.commonarchive.impl.ArchiveImpl.getMofResource(ArchiveImpl.java:528)
at com.ibm.etools.commonarchive.impl.ModuleFileImpl.getDeploymentDescriptorResource(ModuleFileImpl.java:65)
at com.ibm.etools.archive.impl.XmlBasedImportStrategyImpl.primLoadDeploymentDescriptor(XmlBasedImportStrategyImpl.java:35)
at com.ibm.etools.archive.impl.War22ImportStrategyImpl.loadDeploymentDescriptor(War22ImportStrategyImpl.java:72)
at com.ibm.etools.archive.impl.War22ImportStrategyImpl.importMetaData(War22ImportStrategyImpl.java:67)
at com.ibm.etools.commonarchive.impl.WARFileImpl.getDeploymentDescriptor(WARFileImpl.java:201)
at com.ibm.etools.commonarchive.impl.WARFileImpl.getStandardDeploymentDescriptor(WARFileImpl.java:450)
at com.ibm.etools.commonarchive.impl.ArchiveCopyUtility.copy(ArchiveCopyUtility.java:89)
at com.ibm.etools.commonarchive.impl.CommonarchiveFactoryImpl.copy(CommonarchiveFactoryImpl.java:126)
at com.ibm.etools.commonarchive.impl.EARFileImpl.primAddCopyRef(EARFileImpl.java:169)
at com.ibm.etools.commonarchive.impl.EARFileImpl.addCopyRef(EARFileImpl.java:186)
at com.ibm.ws.management.application.client.AppInstallHelper.createEarWrapper(AppInstallHelper.java:466)
at com.ibm.ws.console.appmanagement.action.UploadAction.formUpload(UploadAction.java:181)
at com.ibm.ws.console.appmanagement.action.UploadAction.perform(UploadAction.java:99)
at org.apache.struts.action.ActionServlet.processActionPerform(ActionServlet.java:1791)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1586)
at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:510)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at com.ibm.ws.webcontainer.servlet.StrictServletInstance.doService(StrictServletInstance.java:110)
at com.ibm.ws.webcontainer.servlet.StrictLifecycleServlet._service(StrictLifecycleServlet.java:174)
at com.ibm.ws.webcontainer.servlet.IdleServletState.service(StrictLifecycleServlet.java:313)
at com.ibm.ws.webcontainer.servlet.StrictLifecycleServlet.service(StrictLifecycleServlet.java:116)
at com.ibm.ws.webcontainer.servlet.ServletInstance.service(ServletInstance.java:258)
at com.ibm.ws.webcontainer.servlet.ValidServletReferenceState.dispatch(ValidServletReferenceState.java:42)
at com.ibm.ws.webcontainer.servlet.ServletInstanceReference.dispatch(ServletInstanceReference.java:40)
at com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.handleWebAppDispatch(WebAppRequestDispatcher.java:872)
at com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.dispatch(WebAppRequestDispatcher.java:491)
at com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.forward(WebAppRequestDispatcher.java:173)
at com.ibm.ws.webcontainer.srt.WebAppInvoker.doForward(WebAppInvoker.java:79)
at com.ibm.ws.webcontainer.srt.WebAppInvoker.handleInvocationHook(WebAppInvoker.java:199)
at com.ibm.ws.webcontainer.cache.invocation.CachedInvocation.handleInvocation(CachedInvocation.java:71)
at com.ibm.ws.webcontainer.cache.invocation.CacheableInvocationContext.invoke(CacheableInvocationContext.java:114)
at com.ibm.ws.webcontainer.srp.ServletRequestProcessor.dispatchByURI(ServletRequestProcessor.java:187)
at com.ibm.ws.webcontainer.oselistener.OSEListenerDispatcher.service(OSEListener.java:331)
at com.ibm.ws.webcontainer.http.HttpConnection.handleRequest(HttpConnection.java:56)
at com.ibm.ws.http.HttpConnection.readAndHandleRequest(HttpConnection.java:432)
at com.ibm.ws.http.HttpConnection.run(HttpConnection.java:343)
at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java(Compiled Code))
由于是第一次搞websphere，不知问题所在，在网上查看原因，一开始怀疑是web.xml头<!DOCTYPE web-app
PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
"http://java.sun.com/dtd/web-app_2_3.dtd">有问题，但多次修改后无效，后又怀疑是filter引起的，多次修改还是无效。今天又仔细看了报错原因，“(icon?,display-name?,description?,distributable?,context-param*,filter*,filter-mapping*,listener*,servlet*,servlet-mapping*,session-config?,mime-mapping*,welcome-file-list?,error-page*,taglib*,resource-env-ref*,resource-ref*,security-constraint*,login-config?,security-role*,env-entry*,ejb-ref*,ejb-local-ref*)”。
怀疑是web.xml中段落顺序不对，检查我的web.xml，发现我的session-config标签在servlet标签前，按上面错误提示顺序调整后重新部署，一切ok，笑。原来websphere的语法检查要比tomcat严格得多，