StackOverflowError occurs with sample cxf rest endpoint with OpenApi V3 on karaf environment

Issue

Although the official document guides about the cxf rest endpoint with OpenApi V3 on karaf environment, it does not work as expected.
"Apache CXF Development Guide":"Enabling OpenAPI": "CHAPTER 54. EXTENDING JAX-RS ENDPOINTS WITH OPENAPI SUPPORT": 54.2. Karaf Implementations

By access to "http://localhost:8181/cxf/crm/openapi.json" , then stackoverflow is observed in fuse.log

2020-11-20 13:50:34,784 | WARN  | XNIO-2 task-3        | o.a.c.p.PhaseInterceptorChain    | 83 - org.apache.cxf.cxf-core - 3.2.7.fuse-770017-redhat-00001 | Application {http://rest.cxf.quickstarts.fuse.jboss.org/}CustomerService has thrown exception, unwinding now
org.apache.cxf.interceptor.Fault: null
    at org.apache.cxf.service.invoker.AbstractInvoker.createFault(AbstractInvoker.java:162) ~[!/:3.2.7.fuse-770017-redhat-00001]
    at org.apache.cxf.service.invoker.AbstractInvoker.invoke(AbstractInvoker.java:128) ~[!/:3.2.7.fuse-770017-redhat-00001]
    at org.apache.cxf.jaxrs.JAXRSInvoker.invoke(JAXRSInvoker.java:193) ~[!/:3.2.7.fuse-770017-redhat-00001]
    at org.apache.cxf.jaxrs.JAXRSInvoker.invoke(JAXRSInvoker.java:103) ~[!/:3.2.7.fuse-770017-redhat-00001]
    at org.apache.cxf.interceptor.ServiceInvokerInterceptor$1.run(ServiceInvokerInterceptor.java:59) ~[!/:3.2.7.fuse-770017-redhat-00001]
    at org.apache.cxf.interceptor.ServiceInvokerInterceptor.handleMessage(ServiceInvokerInterceptor.java:96) ~[!/:3.2.7.fuse-770017-redhat-00001]
    at org.apache.cxf.phase.PhaseInterceptorChain.doIntercept(PhaseInterceptorChain.java:308) ~[!/:3.2.7.fuse-770017-redhat-00001]
    at org.apache.cxf.transport.ChainInitiationObserver.onMessage(ChainInitiationObserver.java:121) ~[!/:3.2.7.fuse-770017-redhat-00001]
    at org.apache.cxf.transport.http.AbstractHTTPDestination.invoke(AbstractHTTPDestination.java:267) ~[!/:3.2.7.fuse-770017-redhat-00001]
    at org.apache.cxf.transport.servlet.ServletController.invokeDestination(ServletController.java:234) ~[!/:3.2.7.fuse-770017-redhat-00001]
    at org.apache.cxf.transport.servlet.ServletController.invoke(ServletController.java:208) ~[!/:3.2.7.fuse-770017-redhat-00001]
    at org.apache.cxf.transport.servlet.ServletController.invoke(ServletController.java:160) ~[!/:3.2.7.fuse-770017-redhat-00001]
    at org.apache.cxf.transport.servlet.CXFNonSpringServlet.invoke(CXFNonSpringServlet.java:216) ~[!/:3.2.7.fuse-770017-redhat-00001]
    at org.apache.cxf.transport.servlet.AbstractHTTPServlet.handleRequest(AbstractHTTPServlet.java:301) ~[!/:3.2.7.fuse-770017-redhat-00001]
    at org.apache.cxf.transport.servlet.AbstractHTTPServlet.doGet(AbstractHTTPServlet.java:225) ~[!/:3.2.7.fuse-770017-redhat-00001]
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:645) ~[!/:4.0.1]
    at org.apache.cxf.transport.servlet.AbstractHTTPServlet.service(AbstractHTTPServlet.java:276) ~[!/:3.2.7.fuse-770017-redhat-00001]
    at io.undertow.servlet.handlers.ServletHandler.handleRequest(ServletHandler.java:74) ~[!/:2.0.30.SP1-redhat-00001]
    at io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:62) ~[!/:2.0.30.SP1-redhat-00001]
    at io.undertow.servlet.handlers.ServletChain$1.handleRequest(ServletChain.java:68) ~[!/:2.0.30.SP1-redhat-00001]
    at io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36) ~[!/:2.0.30.SP1-redhat-00001]
    at org.ops4j.pax.web.service.undertow.internal.Context$1.lambda$wrap$0(Context.java:615) ~[?:?]
    at io.undertow.servlet.handlers.RedirectDirHandler.handleRequest(RedirectDirHandler.java:68) [!/:2.0.30.SP1-redhat-00001]
    at io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:132) [!/:2.0.30.SP1-redhat-00001]
    at io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:57) [!/:2.0.30.SP1-redhat-00001]
    at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) [!/:2.0.30.SP1-redhat-00001]
    at io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:46) [!/:2.0.30.SP1-redhat-00001]
    at io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:64) [!/:2.0.30.SP1-redhat-00001]
    at io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:60) [!/:2.0.30.SP1-redhat-00001]
    at io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:77) [!/:2.0.30.SP1-redhat-00001]
    at io.undertow.security.handlers.AbstractSecurityContextAssociationHandler.handleRequest(AbstractSecurityContextAssociationHandler.java:43) [!/:2.0.30.SP1-redhat-00001]
    at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) [!/:2.0.30.SP1-redhat-00001]
    at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) [!/:2.0.30.SP1-redhat-00001]
    at io.undertow.servlet.handlers.SessionRestoringHandler.handleRequest(SessionRestoringHandler.java:119) [!/:2.0.30.SP1-redhat-00001]
    at io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:269) [!/:2.0.30.SP1-redhat-00001]
    at io.undertow.servlet.handlers.ServletInitialHandler.access$100(ServletInitialHandler.java:78) [!/:2.0.30.SP1-redhat-00001]
    at io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:133) [!/:2.0.30.SP1-redhat-00001]
    at io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:130) [!/:2.0.30.SP1-redhat-00001]
    at io.undertow.servlet.core.ServletRequestContextThreadSetupAction$1.call(ServletRequestContextThreadSetupAction.java:48) [!/:2.0.30.SP1-redhat-00001]
    at io.undertow.servlet.core.ContextClassLoaderSetupAction$1.call(ContextClassLoaderSetupAction.java:43) [!/:2.0.30.SP1-redhat-00001]
    at io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:249) [!/:2.0.30.SP1-redhat-00001]
    at io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:78) [!/:2.0.30.SP1-redhat-00001]
    at io.undertow.servlet.handlers.ServletInit