public void setMinimumWaitBetweenFailedConnectionAttempts(int minimumWaitBetweenFailedConnectionAttempts) {
        this.minimumWaitBetweenFailedConnectionAttempts = minimumWaitBetweenFailedConnectionAttempts;
    }
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