question: private void updateUDPCache ( PingData pd ) { if ( setPingData == null && ! warningLogged ) { findPingDataMethod ( ) ; } if ( setPingData != null ) { try { setPingData . invoke ( transport , new Object [ ] { pd } ) ; } catch ( InvocationTargetException | IllegalAccessException e ) { if ( ! warningLogged ) { log . warn ( "Unable to update JGroups address cache - this may affect performance" , e ) ; warningLogged = true ; } } } }
target:  update the logical->physical address cache in UDP, which doesn't seem to be updated by UDP when processing responses from FIND_MBRS