public void setZooKeeperAddress(String address, DatabaseContext databaseContext) {
        Objects.requireNonNull(address, "address cannot be null");
        if (address.equals(zooKeeperAddress)) return;
        fleetControllerContext.log(logger, Level.INFO, "Got new ZooKeeper address to use: " + address);
        zooKeeperAddress = address;
        reset(databaseContext);
    }
Data store for the cluster controller.
The data is stored and distributed by ZooKeeper.
clustercontroller-core/src/main/java/com/yahoo/vespa/clustercontroller/core/database/DatabaseHandler.java