我有一个使用 Sun 的 MSV 库的网络应用程序。MSV 的所有类都包含在 Web 应用程序的 jar 中WEB-INF/lib
。在 JBoss 7 上部署此应用程序时,我收到以下异常:
java.lang.NoClassDefFoundError: Could not initialize class com.sun.msv.datatype.xsd.AnyURIType
at com.sun.msv.datatype.xsd.DatatypeFactory.getTypeByName(DatatypeFactory.java:195)
at com.sun.msv.datatype.xsd.ngimpl.DataTypeLibraryImpl.getType(DataTypeLibraryImpl.java:32)
at com.sun.msv.datatype.xsd.ngimpl.DataTypeLibraryImpl.createDatatypeBuilder(DataTypeLibraryImpl.java:36)
at com.sun.msv.reader.trex.ng.DataState.startSelf(DataState.java:58)
at com.sun.msv.reader.State.init(State.java:153)
at com.sun.msv.reader.GrammarReader.pushState(GrammarReader.java:576)
at com.sun.msv.reader.SimpleState.startElement(SimpleState.java:71)
at org.xml.sax.helpers.XMLFilterImpl.startElement(XMLFilterImpl.java:527)
at com.sun.msv.reader.trex.TREXBaseReader.startElement(TREXBaseReader.java:184)
at com.sun.msv.reader.trex.ng.RELAXNGReader.startElement(RELAXNGReader.java:524)
at com.sun.msv.reader.trex.ng.comp.RELAXNGCompReader.startElement(RELAXNGCompReader.java:197)
at orbeon.apache.xerces.parsers.AbstractSAXParser.startElement(AbstractSAXParser.java:497)
at orbeon.apache.xerces.parsers.AbstractXMLDocumentParser.emptyElement(AbstractXMLDocumentParser.java:180)
at orbeon.apache.xerces.xinclude.XIncludeHandler.emptyElement(XIncludeHandler.java:1024)
at orbeon.apache.xerces.impl.XMLNSDocumentScannerImpl.scanStartElement(XMLNSDocumentScannerImpl.java:275)
at orbeon.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(XMLDocumentFragmentScannerImpl.java:1654)
at orbeon.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:324)
at orbeon.apache.xerces.parsers.XML11Configuration.parse(XML11Configuration.java:845)
at orbeon.apache.xerces.parsers.XML11Configuration.parse(XML11Configuration.java:768)
at orbeon.apache.xerces.parsers.XMLParser.parse(XMLParser.java:108)
at orbeon.apache.xerces.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1201)
at com.sun.msv.reader.util.GrammarLoader._loadSchema(GrammarLoader.java:514)
at com.sun.msv.reader.util.GrammarLoader.parse(GrammarLoader.java:325)
at com.sun.msv.reader.util.GrammarLoader.loadSchema(GrammarLoader.java:189)
at com.sun.msv.verifier.jarv.TheFactoryImpl.parse(TheFactoryImpl.java:42)
at com.sun.msv.verifier.jarv.FactoryImpl.compileSchema(FactoryImpl.java:98)
它抱怨它找不到类com.sun.msv.datatype.xsd.AnyURIType
,但该类存在于其中一个罐子中。我假设堆栈跟踪中的一些类是从来自 JBoss 的模块中“错误地”提取的,因此是从另一个类加载器加载的,而不是从 web 应用程序的 .jar 中的 jar 加载WEB-INF/lib
。但它可以是哪一个?(orbeon.apache.xerces
你看到有一个重新植根的 Apache Xerces 版本,所以我们可以确定它是从 web 应用程序 jar 中加载的。)我已经看到我可以在 中排除一些模块jboss-deployment-structure.xml
,如下所示,但是应该我排除?如何发现?
<jboss-deployment-structure>
<ear-subdeployments-isolated>true</ear-subdeployments-isolated>
<deployment>
<exclusions>
<module name="com.sun.xml.bind"/>
<module name="org.codehaus.woodstox"/>
<module name="org.codehaus.jackson.jackson-xc"/>
</exclusions>
</deployment>
</jboss-deployment-structure>