When I try to connect to an infinispan MBean via JMX, NotSerializableException is thrown.

my guess is: we can't serialize inner classes like InvokableSetterBasedMBeanAttributeInfo, because they contain "hidden" link to ResourceDMBean, which is not serializable.
https://github.com/infinispan/infinispan/blob/master/core/src/main/java/org/infinispan/jmx/ResourceDMBean.java