question: stop this bean server . this method will return immediately , but the server will continue to be up for a few seconds . concode_field_sep Logger LOG concode_elem_sep int port concode_elem_sep ConcurrentHashMap<String,Object> map concode_elem_sep boolean isListening concode_elem_sep ServerSocket listenerSocket concode_field_sep boolean replace concode_elem_sep boolean start concode_elem_sep void run concode_elem_sep Object putIfAbsent concode_elem_sep void setPort concode_elem_sep Object remove
target: void function ( ) { isListening = false ; }