モジュール式のプロジェクトがあり、モジュールごとに、jaxb2-maven-pluginを使用してxjcでXSDファイルをコンパイルします。ここで、モジュールがA->Bの順序でコンパイルされているとします。Aの場合はすべて正常に動作しますが（つまり、* XsdImpl.javaを取得します）、BIの場合は次のようになります。
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.codehaus.mojo:jaxb2-maven-plugin:1.2:xjc (model) on project B: DTD factory class org.apache.xerces.impl.dv.dtd.DTDDVFactoryImpl does not extend from DTDDVFactory. -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.codehaus.mojo:jaxb2-maven-plugin:1.2:xjc (model) on project B: DTD factory class org.apache.xerces.impl.dv.dtd.DTDDVFactoryImpl does not extend from DTDDVFactory
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:217)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:84)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:59)
at org.apache.maven.lifecycle.internal.LifecycleStarter.singleThreadedBuild(LifecycleStarter.java:183)
at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:161)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:319)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:156)
at org.apache.maven.cli.MavenCli.execute(MavenCli.java:537)
at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:196)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:141)
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.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:290)
at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:230)
at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:409)
at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:352)
Caused by: org.apache.maven.plugin.MojoExecutionException: DTD factory class org.apache.xerces.impl.dv.dtd.DTDDVFactoryImpl does not extend from DTDDVFactory.
at org.codehaus.mojo.jaxb2.XjcMojo.execute(XjcMojo.java:352)
at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:101)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:209)
... 19 more
Caused by: org.apache.xerces.impl.dv.DVFactoryException: DTD factory class org.apache.xerces.impl.dv.dtd.DTDDVFactoryImpl does not extend from DTDDVFactory.
at org.apache.xerces.impl.dv.DTDDVFactory.getInstance(Unknown Source)
at org.apache.xerces.impl.dv.DTDDVFactory.getInstance(Unknown Source)
at org.apache.xerces.impl.xs.opti.SchemaParsingConfig.<init>(Unknown Source)
at org.apache.xerces.impl.xs.opti.SchemaParsingConfig.<init>(Unknown Source)
at org.apache.xerces.impl.xs.traversers.XSDHandler.<init>(Unknown Source)
at org.apache.xerces.impl.xs.traversers.XSDHandler.<init>(Unknown Source)
at org.apache.xerces.impl.xs.XMLSchemaLoader.<init>(Unknown Source)
at org.apache.xerces.impl.xs.XMLSchemaLoader.<init>(Unknown Source)
at org.apache.xerces.impl.xs.XMLSchemaValidator.<init>(Unknown Source)
at org.apache.xerces.jaxp.validation.XMLSchemaValidatorComponentManager.<init>(Unknown Source)
at org.apache.xerces.jaxp.validation.ValidatorHandlerImpl.<init>(Unknown Source)
at org.apache.xerces.jaxp.validation.AbstractXMLSchema.newValidatorHandler(Unknown Source)
at com.sun.tools.xjc.SchemaCache.newValidator(SchemaCache.java:47)
at com.sun.tools.xjc.reader.xmlschema.bindinfo.AnnotationParserFactoryImpl$1$1.startElement(AnnotationParserFactoryImpl.java:136)
at com.sun.xml.xsom.impl.parser.state.NGCCRuntime.startElement(NGCCRuntime.java:214)
at org.xml.sax.helpers.XMLFilterImpl.startElement(XMLFilterImpl.java:527)
at com.sun.tools.xjc.reader.ExtensionBindingChecker.startElement(ExtensionBindingChecker.java:271)
at org.xml.sax.helpers.XMLFilterImpl.startElement(XMLFilterImpl.java:527)
at com.sun.tools.xjc.reader.xmlschema.parser.IncorrectNamespaceURIChecker.startElement(IncorrectNamespaceURIChecker.java:97)
at org.xml.sax.helpers.XMLFilterImpl.startElement(XMLFilterImpl.java:527)
at com.sun.tools.xjc.reader.xmlschema.parser.CustomizationContextChecker.startElement(CustomizationContextChecker.java:172)
at org.xml.sax.helpers.XMLFilterImpl.startElement(XMLFilterImpl.java:527)
at com.sun.tools.xjc.ModelLoader$SpeculationChecker.startElement(ModelLoader.java:427)
at org.xml.sax.helpers.XMLFilterImpl.startElement(XMLFilterImpl.java:527)
at com.sun.tools.xjc.reader.internalizer.VersionChecker.startElement(VersionChecker.java:78)
at org.xml.sax.helpers.XMLFilterImpl.startElement(XMLFilterImpl.java:527)
at org.apache.xerces.parsers.AbstractSAXParser.startElement(Unknown Source)
at org.apache.xerces.impl.XMLNSDocumentScannerImpl.scanStartElement(Unknown Source)
at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown Source)
at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)
at org.apache.xerces.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source)
at org.xml.sax.helpers.XMLFilterImpl.parse(XMLFilterImpl.java:333)
at com.sun.xml.xsom.parser.JAXPParser.parse(JAXPParser.java:79)
at com.sun.tools.xjc.ModelLoader$2.parse(ModelLoader.java:451)
at com.sun.tools.xjc.ModelLoader$XMLSchemaParser.parse(ModelLoader.java:237)
at com.sun.xml.xsom.impl.parser.NGCCRuntimeEx.parseEntity(NGCCRuntimeEx.java:298)
at com.sun.xml.xsom.impl.parser.ParserContext.parse(ParserContext.java:87)
at com.sun.xml.xsom.parser.XSOMParser.parse(XSOMParser.java:147)
at com.sun.tools.xjc.ModelLoader.createXSOMSpeculative(ModelLoader.java:468)
at com.sun.tools.xjc.ModelLoader.loadXMLSchema(ModelLoader.java:338)
at com.sun.tools.xjc.ModelLoader.load(ModelLoader.java:145)
at com.sun.tools.xjc.ModelLoader.load(ModelLoader.java:91)
at com.sun.tools.xjc.Driver.run(Driver.java:287)
at org.codehaus.mojo.jaxb2.XjcMojo.execute(XjcMojo.java:301)
... 21 more
[ERROR]
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException
両方のモジュールは、プラグインに同じ構成を使用します。
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>jaxb2-maven-plugin</artifactId>
<executions>
<execution>
<id>model</id>
<goals>
<goal>xjc</goal>
</goals>
<configuration>
<extension>true</extension>
<clearOutputDir>false</clearOutputDir>
<bindingDirectory>${basedir}/src/main/resources/xsd</bindingDirectory>
<outputDirectory>${basedir}/src/main/generated</outputDirectory>
<schemaDirectory>${basedir}/src/main/generated/xsd</schemaDirectory>
<schemaFiles>base.xsd</schemaFiles>
<staleFile>${project.build.directory}/generated-sources/jaxb/.staleFlag-model</staleFile>
</configuration>
</execution>
</executions>
</plugin>
エラーは常に2番目のモジュールで発生します（AかBかは関係ありません）。私は舞台裏で何が起こっているのかを理解するために多くの時間を費やしましたが、残念ながら成功しませんでした...たとえば、ここで最初の実行時に何が起こるかを理解したいと思います。
at org.apache.xerces.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source)
--->>> at org.xml.sax.helpers.XMLFilterImpl.parse(XMLFilterImpl.java:333)
org.apache.xerces.jaxp.SAXParserImplの代わりに別のクラスが使用されていると思いますが、どういうわけかorg.apache.xerces.jaxp.SAXParserImplが2回目に選択されています。または、誰かがすでに同じ問題を経験しましたか？
ヒント/ヘルプを事前に感謝します！さよなら