An interoperability test involving EAP 8 + RHDG on OpenShift is showing a regression of EAP 8 CR2 candidate against EAP 8 CR1.
Specifically the issue is traced by the server the first time an attempt is made to store a session value to a Infinispan remote cache, which is set up to communicate via HotRod (fulll server log attached):

...
Suppressed: org.infinispan.commons.util.logging.TraceException
at org.infinispan@14.0.17.Final-redhat-00002//org.infinispan.interceptors.impl.SimpleAsyncInvocationStage.get(SimpleAsyncInvocationStage.java:39)
at org.infinispan@14.0.17.Final-redhat-00002//org.infinispan.interceptors.impl.AsyncInterceptorChainImpl.invoke(AsyncInterceptorChainImpl.java:249)
at org.infinispan@14.0.17.Final-redhat-00002//org.infinispan.cache.impl.InvocationHelper.doInvoke(InvocationHelper.java:323)
at org.infinispan@14.0.17.Final-redhat-00002//org.infinispan.cache.impl.InvocationHelper.invoke(InvocationHelper.java:111)
at org.infinispan@14.0.17.Final-redhat-00002//org.infinispan.cache.impl.InvocationHelper.invoke(InvocationHelper.java:93)
at org.infinispan@14.0.17.Final-redhat-00002//org.infinispan.cache.impl.CacheImpl.putAll(CacheImpl.java:1361)
at org.infinispan@14.0.17.Final-redhat-00002//org.infinispan.cache.impl.DecoratedCache.putAll(DecoratedCache.java:562)
at org.infinispan@14.0.17.Final-redhat-00002//org.infinispan.cache.impl.DecoratedCache.putAll(DecoratedCache.java:567)
at org.infinispan@14.0.17.Final-redhat-00002//org.infinispan.cache.impl.EncoderCache.putAll(EncoderCache.java:792)
at org.infinispan@14.0.17.Final-redhat-00002//org.infinispan.cache.impl.AbstractDelegatingCache.putAll(AbstractDelegatingCache.java:451)
at org.infinispan@14.0.17.Final-redhat-00002//org.infinispan.cache.impl.AbstractDelegatingCache.putAll(AbstractDelegatingCache.java:451)
at org.wildfly.clustering.web.infinispan@8.0.0.GA-redhat-00010//org.wildfly.clustering.web.infinispan.session.AbstractInfinispanSessionMetaDataFactory.createValue(AbstractInfinispanSessionMetaDataFactory.java:104)
at org.wildfly.clustering.web.infinispan@8.0.0.GA-redhat-00010//org.wildfly.clustering.web.infinispan.session.AbstractInfinispanSessionMetaDataFactory.createValue(AbstractInfinispanSessionMetaDataFactory.java:66)
at org.wildfly.clustering.web.cache@8.0.0.GA-redhat-00010//org.wildfly.clustering.web.cache.session.CompositeSessionFactory.createValue(CompositeSessionFactory.java:55)
at org.wildfly.clustering.web.cache@8.0.0.GA-redhat-00010//org.wildfly.clustering.web.cache.session.CompositeSessionFactory.createValue(CompositeSessionFactory.java:40)
at org.wildfly.clustering.web.infinispan@8.0.0.GA-redhat-00010//org.wildfly.clustering.web.infinispan.session.InfinispanSessionManager.createSession(InfinispanSessionManager.java:165)
at org.wildfly.clustering.web.cache@8.0.0.GA-redhat-00010//org.wildfly.clustering.web.cache.session.ConcurrentSessionManager.apply(ConcurrentSessionManager.java:88)
at org.wildfly.clustering.web.cache@8.0.0.GA-redhat-00010//org.wildfly.clustering.web.cache.session.ConcurrentSessionManager.apply(ConcurrentSessionManager.java:85)
at org.wildfly.clustering.ee.cache@8.0.0.GA-redhat-00010//org.wildfly.clustering.ee.cache.ConcurrentManager.apply(ConcurrentManager.java:91)
at org.wildfly.clustering.web.cache@8.0.0.GA-redhat-00010//org.wildfly.clustering.web.cache.session.ConcurrentSessionManager.createSession(ConcurrentSessionManager.java:92)
at org.wildfly.clustering.web.undertow@8.0.0.GA-redhat-00010//org.wildfly.clustering.web.undertow.session.DistributableSessionManager.createSession(DistributableSessionManager.java:171)
at io.undertow.servlet@2.3.10.SP2-redhat-00001//io.undertow.servlet.spec.ServletContextImpl.getSession(ServletContextImpl.java:967)
at io.undertow.servlet@2.3.10.SP2-redhat-00001//io.undertow.servlet.spec.HttpServletRequestImpl.getSession(HttpServletRequestImpl.java:454)
at deployment.ROOT.war//org.jboss.qa.appsint.deployments.HelloWorldServlet.doGet(HelloWorldServlet.java:18)
...