The scenario is AMQ configured with LDAP based Security Settings to send/consume messages from EAP.
To avoid a performance penalty, the following settings have been added in login.config:

activemq {
   org.apache.activemq.artemis.spi.core.security.jaas.LDAPLoginModule required
       ...
       connectionPool=true
       connectionTimeout="100000";
};

That works to reduce the number of LDAP authentications when a message is sent, yet it does not to reduce authentication for consumers.
As a matter of fact, it produces a number of LDAP authentication attempt for each MDB deployed (if CPU=2, there are 16 login attempts for each MDB deployed).
This is causing a rollback of deployments for applications using a large number of MDBs.