The MBeanInvocationHandler fix in JIRA ENTESB-19690 was incomplete and it ends up with an UndeclaredThrowableException being thrown.

The Karaf commit

https://github.com/apache/karaf/commit/d93d71c8600ad36655c318a59dc6188fefe9d349

does now make the InvocationTargetException being thrown in the end (the PrivilegedActionException wrapping it, a few lines after in the other catch the pae.getCause() value ends up being the InvocationTargetException.

InvocationTargetException being a checked exception, this is recognized not being declared by the invoked method, ending up in a UndeclaredThrowableException being thrown.

Karaf should update

https://github.com/apache/karaf/blob/main/management/server/src/main/java/org/apache/karaf/management/internal/MBeanInvocationHandler.java

around the catch clause in line 74 so that in case the cause being a InvocationTargetException, it throws that exception cause.