There's a typo in the deprecation warning - missing space. Look for operationto .
Operation add against the resource at address /subsystem=jgroups/stack=udp/protocol=org.jgroups.protocols.AUTH/property=auth_class is deprecated, and it might be removed in future version. See the the output of the read-operation-description ***operationto*** learn more about the deprecation.
JBEAP-11490Typo in deprecation warning when adding a deprecated property resource on JGroups protocol