Classpath has classes with the same name but different implementation

[40rn05lyv]

Found that sometimes there are issue related to Unmarshaller implementation. I don't have exact steps, but found that there are classes with the same name, but different implementation in scm-webapp dependencies. That can be the cause of my issue.

I run enforcer on scm-webapp module and it showed following results:

Enforcer rule 'enforcer.rules.BanDuplicateClasses' was triggered.
Duplicate classes found:

  Found in:
    jakarta.xml.bind-api-2.3.2.jar (jakarta.xml.bind:jakarta.xml.bind-api:2.3.2)
  Duplicate classes:
    javax/xml/bind/annotation/adapters/CollapsedStringAdapter.class
    javax/xml/bind/annotation/W3CDomHandler.class
    javax/xml/bind/Binder.class
    javax/xml/bind/DatatypeConverter.class
    javax/xml/bind/helpers/AbstractUnmarshallerImpl.class
    javax/xml/bind/helpers/ValidationEventLocatorImpl.class
    javax/xml/bind/JAXBException.class
    javax/xml/bind/ServiceLoaderUtil.class
    javax/xml/bind/util/JAXBSource.class
    javax/xml/bind/annotation/adapters/HexBinaryAdapter.class
    javax/xml/bind/annotation/XmlAccessOrder.class
    javax/xml/bind/ContextFinder$1.class
    javax/xml/bind/DatatypeConverterImpl$CalendarFormatter.class
    javax/xml/bind/helpers/DefaultValidationEventHandler.class
    javax/xml/bind/JAXB$Cache.class
    javax/xml/bind/JAXB.class
    javax/xml/bind/JAXBContext.class
    javax/xml/bind/Marshaller$Listener.class
    javax/xml/bind/PropertyException.class
    javax/xml/bind/annotation/adapters/NormalizedStringAdapter.class
    javax/xml/bind/annotation/XmlElement$DEFAULT.class
    javax/xml/bind/attachment/AttachmentUnmarshaller.class
    javax/xml/bind/DataBindingException.class
    javax/xml/bind/helpers/AbstractMarshallerImpl.class
    javax/xml/bind/helpers/ValidationEventImpl.class
    javax/xml/bind/JAXBElement.class
    javax/xml/bind/ModuleUtil.class
    javax/xml/bind/TypeConstraintException.class
    javax/xml/bind/util/Messages.class
    javax/xml/bind/WhiteSpaceProcessor.class
    javax/xml/bind/annotation/adapters/XmlAdapter.class
    javax/xml/bind/annotation/XmlElementDecl$GLOBAL.class
    javax/xml/bind/annotation/XmlNsForm.class
    javax/xml/bind/ContextFinder$4.class
    javax/xml/bind/GetPropertyAction.class
    javax/xml/bind/MarshalException.class
    javax/xml/bind/annotation/adapters/XmlJavaTypeAdapter$DEFAULT.class
    javax/xml/bind/annotation/XmlAccessType.class
    javax/xml/bind/ContextFinder$2.class
    javax/xml/bind/ContextFinder$3.class
    javax/xml/bind/JAXBContext$1.class
    javax/xml/bind/JAXBPermission.class
    javax/xml/bind/Unmarshaller$Listener.class
    javax/xml/bind/util/ValidationEventCollector.class
    javax/xml/bind/annotation/XmlElementRef$DEFAULT.class
    javax/xml/bind/annotation/XmlType$DEFAULT.class
    javax/xml/bind/DatatypeConverterImpl.class
    javax/xml/bind/helpers/PrintConversionEventImpl.class
    javax/xml/bind/JAXBElement$GlobalScope.class
    javax/xml/bind/Messages.class
    javax/xml/bind/ServiceLoaderUtil$ExceptionHandler.class
    javax/xml/bind/util/JAXBSource$1.class
    javax/xml/bind/ValidationException.class
    javax/xml/bind/ContextFinder$5.class
    javax/xml/bind/helpers/NotIdentifiableEventImpl.class
    javax/xml/bind/helpers/ParseConversionEventImpl.class
    javax/xml/bind/SchemaOutputResolver.class
    javax/xml/bind/util/JAXBResult.class
    javax/xml/bind/annotation/XmlSchemaType$DEFAULT.class
    javax/xml/bind/attachment/AttachmentMarshaller.class
    javax/xml/bind/ContextFinder.class
    javax/xml/bind/helpers/Messages.class
    javax/xml/bind/JAXBIntrospector.class
    javax/xml/bind/UnmarshalException.class

  Found in:
    javax.annotation-api-1.3.2.jar (javax.annotation:javax.annotation-api:1.3.2)
    jboss-annotations-api_1.3_spec-2.0.1.Final.jar (org.jboss.spec.javax.annotation:jboss-annotations-api_1.3_spec:2.0.1.Final)
  Duplicate classes:
    javax/annotation/Resource$AuthenticationType.class

  Found in:
    jakarta.activation-1.2.2.jar (com.sun.activation:jakarta.activation:1.2.2)
  Duplicate classes:
    javax/activation/CommandInfo$Beans$1.class
    javax/activation/MimeTypeParseException.class
    javax/activation/CommandObject.class
    javax/activation/MailcapCommandMap$1.class
    javax/activation/DataSourceDataContentHandler.class
    javax/activation/FileDataSource.class
    javax/activation/CommandMap.class
    javax/activation/SecuritySupport$5.class
    javax/activation/CommandInfo.class
    javax/activation/MimeTypeParameterList.class
    javax/activation/SecuritySupport$3.class
    javax/activation/MimetypesFileTypeMap$1.class
    javax/activation/UnsupportedDataTypeException.class
    javax/activation/CommandInfo$Beans.class
    javax/activation/FileTypeMap.class
    javax/activation/MimetypesFileTypeMap.class
    javax/activation/DataHandlerDataSource.class
    javax/activation/DataSource.class
    javax/activation/MailcapCommandMap.class
    javax/activation/SecuritySupport$1.class
    javax/activation/ActivationDataFlavor.class
    javax/activation/SecuritySupport$2.class
    javax/activation/DataHandler.class
    javax/activation/SecuritySupport$4.class
    javax/activation/ObjectDataContentHandler.class
    javax/activation/SecuritySupport.class
    javax/activation/DataContentHandlerFactory.class
    javax/activation/MimeType.class
    javax/activation/DataContentHandler.class
    javax/activation/URLDataSource.class
    javax/activation/DataHandler$1.class

  Found in:
    jcl-over-slf4j-1.7.30.jar (org.slf4j:jcl-over-slf4j:1.7.30)
    commons-logging-1.2.jar (commons-logging:commons-logging:1.2)
  Duplicate classes:
    org/apache/commons/logging/impl/SimpleLog.class
    org/apache/commons/logging/impl/NoOpLog.class
    org/apache/commons/logging/impl/SimpleLog$1.class
    org/apache/commons/logging/LogConfigurationException.class
    org/apache/commons/logging/LogFactory.class
    org/apache/commons/logging/Log.class

Need to choose between those libs to have consistently behaving app.

In order to run enforcer over scm-webapp project, you have to disable it in settings.gradle, add it to scm-webapp and comment all corePlugin dependencies.

enforce {
  rule(enforcer.rules.BanDuplicateClasses) { r ->
    r.findAllDuplicates = true
    r.ignoreWhenIdentical = true
  }
}

[pfeuffer]

Hi, thank you for the hint. We will take a look at it.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.