Deployment failures at the wrong point can leave an endpoint registered, undeployment does not remove the registration so further deployments fail with errors similar to: -

java.lang.IllegalStateException: Endpoint already registered: jboss.ws:context=x_jboss,endpoint=X_Service

The underlying cause is that the deployment aspects are not used to undeploy the endpoint if the deployment fails part way through, the aspect responsible for registration then rejects the second attempt as it appears it is already deployed.