Currently if you have
infinispan-commons-9.1.6.Final.jar and infinispan-core-9.1.6.Final.jar
on your module path, jvm complains as both jars export package org.infinispan.util
which violates the modules contract where only one module (jar) can provide single package.

example error that jvm prints

Error: Modules infinispan.commons and infinispan.core export package org.infinispan.util to module wildfly.clustering.common