I added Wildfly Swarm 2017.12.1 to my pom. I have not added the fractions manually since all are discovered automatically:
2018-01-03 14:37:34,976 INFO [org.wildfly.swarm] (main) WFSWARM0013: Installed fraction: Logging - STABLE org.wildfly.swarm:logging:2017.12.1
2018-01-03 14:37:34,982 INFO [org.wildfly.swarm] (main) WFSWARM0013: Installed fraction: JAX-RS with JAXB - STABLE org.wildfly.swarm:jaxrs-jaxb:2017.12.1
2018-01-03 14:37:34,982 INFO [org.wildfly.swarm] (main) WFSWARM0013: Installed fraction: CDI Configuration - STABLE org.wildfly.swarm:cdi-config:2017.12.1
2018-01-03 14:37:34,982 INFO [org.wildfly.swarm] (main) WFSWARM0013: Installed fraction: CDI - STABLE org.wildfly.swarm:cdi:2017.12.1
2018-01-03 14:37:34,982 INFO [org.wildfly.swarm] (main) WFSWARM0013: Installed fraction: Hibernate Validator - STABLE org.wildfly.swarm:hibernate-validator:2017.12.1
2018-01-03 14:37:34,982 INFO [org.wildfly.swarm] (main) WFSWARM0013: Installed fraction: JAX-RS with Validation - STABLE org.wildfly.swarm:jaxrs-validator:2017.12.1
2018-01-03 14:37:34,982 INFO [org.wildfly.swarm] (main) WFSWARM0013: Installed fraction: JCA - STABLE org.wildfly.swarm:jca:2017.12.1
2018-01-03 14:37:34,983 INFO [org.wildfly.swarm] (main) WFSWARM0013: Installed fraction: Datasources - STABLE org.wildfly.swarm:datasources:2017.12.1
2018-01-03 14:37:34,983 INFO [org.wildfly.swarm] (main) WFSWARM0013: Installed fraction: Bean Validation - STABLE org.wildfly.swarm:bean-validation:2017.12.1
2018-01-03 14:37:34,983 INFO [org.wildfly.swarm] (main) WFSWARM0013: Installed fraction: Elytron - STABLE org.wildfly.swarm:elytron:2017.12.1
2018-01-03 14:37:34,983 INFO [org.wildfly.swarm] (main) WFSWARM0013: Installed fraction: JAX-RS - STABLE org.wildfly.swarm:jaxrs:2017.12.1
2018-01-03 14:37:34,983 INFO [org.wildfly.swarm] (main) WFSWARM0013: Installed fraction: JPA - STABLE org.wildfly.swarm:jpa:2017.12.1
2018-01-03 14:37:34,983 INFO [org.wildfly.swarm] (main) WFSWARM0013: Installed fraction: Transactions - STABLE org.wildfly.swarm:transactions:2017.12.1
2018-01-03 14:37:34,984 INFO [org.wildfly.swarm] (main) WFSWARM0013: Installed fraction: Undertow - STABLE org.wildfly.swarm:undertow:2017.12.1
2018-01-03 14:37:34,984 WARN [org.wildfly.swarm] (main) WFSWARM0013: Installed fraction: Swagger - UNSTABLE org.wildfly.swarm:swagger:2017.12.1
The swagger fraction is unstable. I am not sure why, but anyway. It is added, and later on I get some errors. The error message that I get is this:
2018-01-03 14:37:46,545 ERROR [org.jboss.msc.service.fail] (ServerService Thread Pool -- 11) MSC000001: Failed to start service jboss.undertow.deployment.default-server.default-host./: org.jboss.msc.service.StartException in service jboss.undertow.deployment.default-server.default-host./: java.lang.RuntimeException: RESTEASY003945: Unable to instantiate MessageBodyWriter
.... long stacktrace ...
Caused by: java.lang.RuntimeException: RESTEASY003945: Unable to instantiate MessageBodyWriter
... long stacktrace ...
Caused by: org.jboss.weld.exceptions.AmbiguousResolutionException: WELD-001318: Cannot resolve an ambiguous dependency between:
- Managed Bean [class io.swagger.jaxrs.listing.SwaggerSerializers] with qualifiers [@Any @Default],
- Managed Bean [class io.swagger.jaxrs.listing.SwaggerSerializers] with qualifiers [@Any @Default]
... stacktrace...
As you can see it finds SwaggerSerializers twice in the classpath, so I guess it's an issue with Swarm installing the swagger fraction. Perhaps if I add all dependencies manually an leaving swagger out it may work. But I don't think that is a good solution. As noted in https://issues.jboss.org/browse/SWARM-271 it was a bug.
Is there any way to fix this?
I found the solution. I simply had to add <scope>provided</scope> to swagger's dependency in my project's pom.