run cfScanDump method result :WRONGTYPE Operation against a key holding the wrong kind of value

[startjava]

package com.ghy.www.test9;

import com.ghy.www.f.F; import io.rebloom.client.Client; import io.rebloom.client.ReserveParams; import redis.clients.jedis.Jedis; import redis.clients.jedis.JedisPool; import redis.clients.jedis.JedisPoolConfig;

import java.util.HashMap; import java.util.Iterator; import java.util.Map; import java.util.Set;

public class Bloom_6 { private static JedisPool pool = new JedisPool(new JedisPoolConfig(), F.IP_1, F.PORT_1, F.TIMEOUT_1, F.PASSWORD_1);

public static void main(String[] args) {
    Jedis jedis = null;
    Client client = null;
    try {
        jedis = pool.getResource();
        jedis.flushDB();

        client = new Client(pool);

        ReserveParams params = new ReserveParams();
        client.bfReserve("mykey", 0.001, 10, params);
        client.add("mykey", "a");
        client.add("mykey", "b");
        client.add("mykey", "c");
        client.add("mykey", "d");
        client.add("mykey", "e");

        Map backupMap = new HashMap();

        Map.Entry<Long, byte[]> mykey = client.cfScanDump("mykey", 0);
        while (mykey.getKey() != 0) {
            long cursor = mykey.getKey();
            byte[] dataArray = mykey.getValue();
            backupMap.put(cursor, dataArray);
            mykey = client.cfScanDump("mykey", cursor);
        }

        jedis.flushDB();

        Set<Map.Entry> set = backupMap.entrySet();
        Iterator<Map.Entry> iterator = set.iterator();
        while (iterator.hasNext()) {
            client.cfLoadChunk("mykey", iterator.next());
        }

        System.out.println();
        Map<String, Object> mykeyInfo = client.info("mykey");
        for (String eachKey : mykeyInfo.keySet()) {
            System.out.println("key=" + eachKey + " value=" + mykeyInfo.get(eachKey));
        }

    } catch (Exception e) {
        e.printStackTrace();
    } finally {
        if (jedis != null) {
            jedis.close();
        }
        if (client != null) {
            client.close();
        }
    }
}

}

redis.clients.jedis.exceptions.JedisDataException: WRONGTYPE Operation against a key holding the wrong kind of value

[startjava]

about cf data type . no bf data type.