question: private void notifyDbSvcWithObsoleteCassandraPeers ( String svcName , List < String > peerList ) { String result = StringUtils . join ( peerList . iterator ( ) , "," ) ; updateDbSvcConfig ( svcName , Constants . OBSOLETE_CASSANDRA_PEERS , result ) ; }
target:  Notify dbsvc with a list of obsolete cassandra peers, so that it could remove them before start