DuplicateServiceException or there is no activation, if the ServiceActivator is moved from the jar module to the EAR deployment level. ---------------------------------------------------------------------------------------------------------------------------------------- Key: WFCORE-1234 URL: https://issues.jboss.org/browse/WFCORE-1234 Project: WildFly Core Issue Type: Bug Reporter: Panagiotis Sotiropoulos Assignee: Panagiotis Sotiropoulos If one EAR contains more than one module with a META-INF/services/org.jboss.msc.service.ServiceActivator, If the file is moved to the ear/META-INF as the only one there is no activation. If the ear and a jar contain it it will fail with a org.jboss.msc.service.DuplicateServiceException.