MicroProfile integration is using a ServletContext which requires requestScope to be active. When trying the MP Rest Client tck with WildFly this requirement creates the following failure:
org.jboss.weld.contexts.ContextNotActiveException: WELD-001303: No active contexts for scope type javax.enterprise.context.RequestScoped
at org.jboss.weld.core@3.1.3.Final//org.jboss.weld.manager.BeanManagerImpl.getContext(BeanManagerImpl.java:647)
at org.jboss.weld.core@3.1.3.Final//org.jboss.weld.bean.ContextualInstanceStrategy$DefaultContextualInstanceStrategy.getIfExists(ContextualInstanceStrategy.java:89)
at org.jboss.weld.core@3.1.3.Final//org.jboss.weld.bean.ContextualInstance.getIfExists(ContextualInstance.java:63)
at org.jboss.weld.core@3.1.3.Final//org.jboss.weld.bean.proxy.ContextBeanInstance.getInstance(ContextBeanInstance.java:87)
at org.jboss.weld.core@3.1.3.Final//org.jboss.weld.bean.proxy.ProxyMethodHandler.invoke(ProxyMethodHandler.java:105)
at org.jboss.weld.core@3.1.3.Final//org.jboss.weldx.servlet.ServletContext$$Proxy$_$$_WeldClientProxy.getAttribute(Unknown Source)
at org.wildfly.microprofile.opentracing-smallrye@20.0.0.Beta1-SNAPSHOT//org.wildfly.microprofile.opentracing.smallrye.TracerProducer.getTracer(TracerProducer.java:43)