Previously, when an IntegrationMBeanExporter was present, all MBeans in o.s.i packages were suppressed from being exported by other MBean exporters. See
In 4.2.1, this was changed to suppress only those beans annotated with @IntegrationManagedResource.
However, router handlers are created by a RouterFactoryBean which is not so-annotated so router handlers are exported by all exporters.
This caused an issue in XD because it did not have a unique domain for the context MBeanExporter.