protected ScheduledFuture<?> sf;
protected int retryDelayInSeconds;
public BackgroundCassandraHostService(HConnectionManager connectionManager,
CassandraHostConfigurator cassandraHostConfigurator) {
executor = Executors.newScheduledThreadPool(1, new DaemonThreadPoolFactory(getClass()));
this.connectionManager = connectionManager;
this.cassandraHostConfigurator = cassandraHostConfigurator;
}