The connector tests in the EE 9 platform TCK have 56 failures that stem from failures to deploy two of the rars the TCK deploys, whitebox-mixedmode.rar and whitebox-permissiondd.rar. Both fail to deploy with a failure message similar to this: 2020-10-29 15:01:48,363 ERROR [org.jboss.msc.service.fail] (ServerService Thread Pool -- 10) MSC000001: Failed to start service jboss.ra.deployment. "whitebox-mixedmode.rar" : org.jboss.msc.service.StartException in service jboss.ra.deployment. "whitebox-mixedmode.rar" : WFLYJCA0046: Failed to start RA deployment [whitebox-mixedmode.rar] at org.jboss.as.connector.services.resourceadapters.deployment.AbstractResourceAdapterDeploymentService$2.run(AbstractResourceAdapterDeploymentService.java:340) [wildfly-connector-22.0.0.Beta1-SNAPSHOT.jar:22.0.0.Beta1-SNAPSHOT] at org.jboss.threads.ContextClassLoaderSavingRunnable.run(ContextClassLoaderSavingRunnable.java:35) [jboss-threads-2.4.0.Final.jar:2.4.0.Final] at org.jboss.threads.EnhancedQueueExecutor.safeRun(EnhancedQueueExecutor.java:1990) [jboss-threads-2.4.0.Final.jar:2.4.0.Final] at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.doRunTask(EnhancedQueueExecutor.java:1486) [jboss-threads-2.4.0.Final.jar:2.4.0.Final] at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.run(EnhancedQueueExecutor.java:1377) [jboss-threads-2.4.0.Final.jar:2.4.0.Final] at java.lang. Thread .run( Thread .java:748) [rt.jar:1.8.0_265] at org.jboss.threads.JBossThread.run(JBossThread.java:513) [jboss-threads-2.4.0.Final.jar:2.4.0.Final] Caused by: org.jboss.msc.service.DuplicateServiceException: Service jboss.ra.whitebox-mixedmode is already registered at org.jboss.msc.service.ServiceRegistrationImpl.set(ServiceRegistrationImpl.java:135) [jboss-msc-1.4.12.Final.jar:1.4.12.Final] at org.jboss.msc.service.ServiceControllerImpl.startInstallation(ServiceControllerImpl.java:243) [jboss-msc-1.4.12.Final.jar:1.4.12.Final] at org.jboss.msc.service.ServiceContainerImpl.install(ServiceContainerImpl.java:747) [jboss-msc-1.4.12.Final.jar:1.4.12.Final] at org.jboss.msc.service.ServiceTargetImpl.install(ServiceTargetImpl.java:260) [jboss-msc-1.4.12.Final.jar:1.4.12.Final] at org.jboss.msc.service.ServiceControllerImpl$ChildServiceTarget.install(ServiceControllerImpl.java:2065) [jboss-msc-1.4.12.Final.jar:1.4.12.Final] at org.jboss.msc.service.ServiceBuilderImpl.install(ServiceBuilderImpl.java:192) [jboss-msc-1.4.12.Final.jar:1.4.12.Final] at org.jboss.as.connector.services.resourceadapters.deployment.ResourceAdapterXmlDeploymentService.start(ResourceAdapterXmlDeploymentService.java:140) [wildfly-connector-22.0.0.Beta1-SNAPSHOT.jar:22.0.0.Beta1-SNAPSHOT] It seems both ResourceAdapterDeploymentService and ResourceAdapterXmlDeploymentService are attempting to install the ResourceAdapterService. I believe this is due to IronJacamar not handling completely its Version.V_20 that was added in JBJCA-1412 . There are a number of classes that check for Version.V_17 and adapt handling if that's the version. Version.V_20 is logically equivalent (EE 9 and EE 8 are not meant to have different behavior) so those same check should consider Version.V_20. If I change the ra.xml files in the two rars to use the 1.6 or 1.7 version and namespace but make no other changes to the configs the connector tests all pass.