Thanks for the report!  I filed [WFLY-12236] Log spam in category org.apache.activemq.audit.base - JBoss Issue Tracker  for it.

A workaround would be to configure the logging subsystem to limit that category to WARN or greater.

<logger category="org.apache.activemq.audit.base">

  <level name="WARN"/>

</logger>

Probably better to turn off the parent category:

<logger category="org.apache.activemq.audit">

  <level name="WARN"/>

</logger>

That or the two subcategories I see:

<logger category="org.apache.activemq.audit.base">

  <level name="WARN"/>

</logger>

<logger category="org.apache.activemq.audit.message">

  <level name="WARN"/>

</logger>