When a Datasource is defined either using @DatasourceDefinition or via web.xml, it isn't registered in the deployment model at /deployment=xx.war/subsystem=datasources.

It works as expected when deploying the datasource via the deprecated *-ds.xml way.

Looking at the code, it seems that DataSourceDefinitionAnnotationProcessor and DataSourceDefinitionDescriptorProcessor just need to add the resource to the org.jboss.as.server.deployment.Attachments.DEPLOYMENT_RESOURCE_SUPPORT as DsXmlDeploymentInstallProcessor does.