AppEngine錯誤[java.lang.NoClassDefFoundError：org/w3c/dom/ElementTraversal]

我正在尋找解決這個問題的辦法，但似乎很難。我有一個處理註冊的servlet的appengine項目。當我嘗試調用這個servlet時，我有這個日誌報告：AppEngine錯誤[java.lang.NoClassDefFoundError：org/w3c/dom/ElementTraversal]

012-04-19 10:31:06.816 /register 500 90ms 0kb Apache-HttpClient/UNAVAILABLE (java 1.4) 
ip - gecodroidtest [19/Apr/2012:10:31:06 -0700] "POST /register HTTP/1.1" 500 0 - "Apache-HttpClient/UNAVAILABLE (java 1.4)" "cloudnotifyit.appspot.com" ms=90 cpu_ms=58 api_cpu_ms=0 cpm_usd=0.001738 instance=00c61b117c772731eb45290bfcb07750c0505f 
W 2012-04-19 10:31:06.794 
com.cloudnotify.server.servlet.RequestInfo processRequest: [email protected] //just for me 
W 2012-04-19 10:31:06.810 
Error for /register 
java.lang.NoClassDefFoundError: org/w3c/dom/ElementTraversal 
    at com.google.appengine.runtime.Request.process-240c2ffe1bf8ddba(Request.java) 
    at java.lang.ClassLoader.defineClass1(Native Method) 
    at java.lang.ClassLoader.defineClass(ClassLoader.java:634) 
    at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) 
    at java.net.URLClassLoader.defineClass(URLClassLoader.java:277) 
    at sun.reflect.GeneratedMethodAccessor5.invoke(Unknown Source) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
    at java.lang.reflect.Method.invoke(Method.java:616) 
    at java.lang.ClassLoader.loadClass(ClassLoader.java:266) 
    at org.apache.xerces.parsers.AbstractDOMParser.startDocument(Unknown Source) 
    at org.apache.xerces.impl.dtd.XMLDTDValidator.startDocument(Unknown Source) 
    at org.apache.xerces.impl.XMLDocumentScannerImpl.startEntity(Unknown Source) 
    at org.apache.xerces.impl.XMLVersionDetector.startDocumentParsing(Unknown Source) 
    at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source) 
    at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source) 
    at org.apache.xerces.parsers.XMLParser.parse(Unknown Source) 
    at org.apache.xerces.parsers.DOMParser.parse(Unknown Source) 
    at org.apache.xerces.jaxp.DocumentBuilderImpl.parse(Unknown Source) 
    at javax.xml.parsers.DocumentBuilder.parse(DocumentBuilder.java:121) 
    at javax.jdo.JDOHelper.readNamedPMFProperties(JDOHelper.java:1407) 
    at javax.jdo.JDOHelper.getNamedPMFProperties(JDOHelper.java:1286) 
    at javax.jdo.JDOHelper.getPropertiesFromJdoconfig(JDOHelper.java:1232) 
    at javax.jdo.JDOHelper.getPersistenceManagerFactory(JDOHelper.java:1079) 
    at javax.jdo.JDOHelper.getPersistenceManagerFactory(JDOHelper.java:914) 
    at com.cloudnotify.server.c2dm.C2DMessaging.getPMF(C2DMessaging.java:103) 
    at com.cloudnotify.server.servlet.RequestInfo.initDevices(RequestInfo.java:225) 
    at com.cloudnotify.server.servlet.RequestInfo.processRequest(RequestInfo.java:183) 
    at com.cloudnotify.server.servlet.RegisterServlet.doPost(RegisterServlet.java:100) 
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:637) 
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) 
    at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511) 
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166) 
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) 
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) 
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) 
    at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388) 
    at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216) 
    at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182) 
    at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765) 
    at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418) 
    at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152) 
    at org.mortbay.jetty.Server.handle(Server.java:326) 
    at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542) 
    at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:923) 
    at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404) 
    at com.google.tracing.TraceContext$TraceContextRunnable.runInContext(TraceContext.java:449) 
    at com.google.tracing.TraceContext$TraceContextRunnable$1.run(TraceContext.java:455) 
    at com.google.tracing.TraceContext.runInContext(TraceContext.java:695) 
    at com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContextNoUnref(TraceContext.java:333) 
    at com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContext(TraceContext.java:325) 
    at com.google.tracing.TraceContext$TraceContextRunnable.run(TraceContext.java:453) 
    at java.lang.Thread.run(Thread.java:679) 
Caused by: java.lang.ClassNotFoundException: org.w3c.dom.ElementTraversal 
    at com.google.appengine.runtime.Request.process-240c2ffe1bf8ddba(Request.java) 
    ... 44 more 
C 2012-04-19 10:31:06.812 
Uncaught exception from servlet 
java.lang.NoClassDefFoundError: org/w3c/dom/ElementTraversal 
    at com.google.appengine.runtime.Request.process-240c2ffe1bf8ddba(Request.java) 
    at java.lang.ClassLoader.defineClass1(Native Method) 
    at java.lang.ClassLoader.defineClass(ClassLoader.java:634) 
    at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) 
    at java.net.URLClassLoader.defineClass(URLClassLoader.java:277) 
    at sun.reflect.GeneratedMethodAccessor5.invoke(Unknown Source) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
    at java.lang.reflect.Method.invoke(Method.java:616) 
    at java.lang.ClassLoader.loadClass(ClassLoader.java:266) 
    at org.apache.xerces.parsers.AbstractDOMParser.startDocument(Unknown Source) 
    at org.apache.xerces.impl.dtd.XMLDTDValidator.startDocument(Unknown Source) 
    at org.apache.xerces.impl.XMLDocumentScannerImpl.startEntity(Unknown Source) 
    at org.apache.xerces.impl.XMLVersionDetector.startDocumentParsing(Unknown Source) 
    at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source) 
    at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source) 
    at org.apache.xerces.parsers.XMLParser.parse(Unknown Source) 
    at org.apache.xerces.parsers.DOMParser.parse(Unknown Source) 
    at org.apache.xerces.jaxp.DocumentBuilderImpl.parse(Unknown Source) 
    at javax.xml.parsers.DocumentBuilder.parse(DocumentBuilder.java:121) 
    at javax.jdo.JDOHelper.readNamedPMFProperties(JDOHelper.java:1407) 
    at javax.jdo.JDOHelper.getNamedPMFProperties(JDOHelper.java:1286) 
    at javax.jdo.JDOHelper.getPropertiesFromJdoconfig(JDOHelper.java:1232) 
    at javax.jdo.JDOHelper.getPersistenceManagerFactory(JDOHelper.java:1079) 
    at javax.jdo.JDOHelper.getPersistenceManagerFactory(JDOHelper.java:914) 
    at com.cloudnotify.server.c2dm.C2DMessaging.getPMF(C2DMessaging.java:103) 
    at com.cloudnotify.server.servlet.RequestInfo.initDevices(RequestInfo.java:225) 
    at com.cloudnotify.server.servlet.RequestInfo.processRequest(RequestInfo.java:183) 
    at com.cloudnotify.server.servlet.RegisterServlet.doPost(RegisterServlet.java:100) 
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:637) 
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) 
    at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511) 
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166) 
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) 
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) 
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) 
    at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388) 
    at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216) 
    at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182) 
    at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765) 
    at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418) 
    at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152) 
    at org.mortbay.jetty.Server.handle(Server.java:326) 
    at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542) 
    at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:923) 
    at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404) 
    at com.google.tracing.TraceContext$TraceContextRunnable.runInContext(TraceContext.java:449) 
    at com.google.tracing.TraceContext$TraceContextRunnable$1.run(TraceContext.java:455) 
    at com.google.tracing.TraceContext.runInContext(TraceContext.java:695) 
    at com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContextNoUnref(TraceContext.java:333) 
    at com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContext(TraceContext.java:325) 
    at com.google.tracing.TraceContext$TraceContextRunnable.run(TraceContext.java:453) 
    at java.lang.Thread.run(Thread.java:679) 
Caused by: java.lang.ClassNotFoundException: org.w3c.dom.ElementTraversal 
    at com.google.appengine.runtime.Request.process-240c2ffe1bf8ddba(Request.java) 
    ... 44 more 


Thanks all

來源

2012-04-19 LucasJJ

分享我觀察到的............即使在WEB_INF/lib中有xml-apis-1.3.02，我也會遇到同樣的異常。我只是轉而使用這個jar xml-apis-1.4.01的新版本，它工作正常。 – veer7 2012-07-13 16:04:22

GAE上的Xerces解析器可能存在一些問題。請參閱http://code.google.com/p/googleappengine/issues/detail?id=1367

也許解決方法是確保所有Xerces jar（包括xml-apis.jar）都在您的WEB-INF/lib中。

來源

2012-04-19 19:17:46

非常感謝，包括WEB-INF/LIB中的xml-apis.jar工作並解決了問題！ – LucasJJ 2012-04-20 06:17:24

是的，因爲某些原因Xerces || NekoHtmlParser jar沒有導入！ – danielad 2013-12-13 10:44:56

168

MAVEN SOLUTION：

在pom.xml中，設置「XML的API」依賴於1.4.01版本：

<dependency> 
    <groupId>xml-apis</groupId> 
    <artifactId>xml-apis</artifactId> 
    <version>1.4.01</version> 
</dependency>

解其他人：

如果不使用maven，則可以手動添加xml-apis庫，版本爲1.4.01。您將在xml-commons二進制包中找到名爲「XML Commons External 1.4.01」的jar文件，您可以在此處下載它：http://xerces.apache.org/mirrors.cgi。

最後，用這個版本的庫編譯並執行你的java應用程序/項目。

說明：

的1.4.01版的XML的API庫，包括所需的ElementTraversal類。其他版本如2.0.0,1.0.0等不包括它，並且編譯時應用程序失敗。

來源

2013-03-04 09:00:10 tremendows

我和Selenium WebDriver有類似的問題。將xml-apis添加到項目中修復它。謝謝。 – 2013-05-28 23:25:10

Tomcat 7 maven插件有同樣的問題，在我添加了xml-apis依賴關係後，它似乎工作正常 – webjockey 2015-01-09 18:09:14

似乎2.0.2版本意外地發佈了不正確的版本，他們後來將該版本移動到正確的版本。請參閱http://mvnrepository.com/artifact/xml-apis/xml-apis/2.0.2（2002年發佈的2.0.2，但最新的正確版本1.4.01於2009年發佈） – manikanta 2015-02-09 13:37:46

您的問題可以通過更新到版本2.11.0.SP5來解決，該版本已包含類ElementTraversal。

來源

2017-03-06 13:23:20 Javo

AppEngine錯誤[java.lang.NoClassDefFoundError：org/w3c/dom/ElementTraversal]

回答

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