jbossws-cxf-client depends on both jboss-jaxws-api_2.2_spec and jboss-jaxws-api_2.3_spec ---------------------------------------------------------------------------------------- Key: JBWS-4154 URL: https://issues.jboss.org/browse/JBWS-4154 Project: JBoss Web Services Issue Type: Bug Affects Versions: jbossws-cxf-5.2.4.Final Reporter: Jan Blizňák Assignee: r searls Priority: Major Fix For: jbossws-cxf-5.3.0.Final dependency:tree goal output shows that jbossws-cxf-client (and transitively other modules too) depends on two versions of JBoss JAX-WS API: org.jboss.spec.javax.xml.ws:jboss-jaxws-api_2.2_spec:jar:2.0.2.Final:compile org.jboss.spec.javax.xml.ws:jboss-jaxws-api_2.3_spec:jar:1.0.0.Final:compile The former is brought in by: {code:java} +- org.jboss.ws.cxf:jbossws-cxf-transports-undertow:jar:5.2.5-SNAPSHOT:compile | \- org.jboss.ws.projects:jaxws-undertow-httpspi:jar:1.0.1.Final:compile | +- org.jboss.spec.javax.xml.ws:jboss-jaxws-api_2.2_spec:jar:2.0.2.Final:compile {code} I guess we should stick to the newer one which would mean add some dependency exclude or update jaxws-undertow-httpspi to new API version stream (I vote for this) Whole dependency tree at https://github.com/jbliznak/jbws-dependency-trees/blob/jdk11-after/jbossw...