public void setZooKeeperSessionTimeout(int timeout, DatabaseContext databaseContext) {
        if (timeout == zooKeeperSessionTimeout) return;
        fleetControllerContext.log(logger, Level.FINE, () -> "Got new ZooKeeper session timeout of " + timeout + " milliseconds.");
        zooKeeperSessionTimeout = timeout;
        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