backtype.storm.StormSubmitter - Topology submission exception: Field storm.zookeeper.servers must be an Iterable of java.lang.String

While submitting storm topology on production cluster, if you mention zookeeper server as mentioned below then it will through the exception

        Config conf = new Config();
        conf.put(Config.NIMBUS_HOST, "nimbus-ip");
        conf.put(Config.NIMBUS_THRIFT_PORT,6627);
        conf.put(Config.STORM_ZOOKEEPER_PORT,2181);
        conf.put(Config.STORM_ZOOKEEPER_SERVERS,"zkerver-ip");
 
3126 [main] WARN  backtype.storm.StormSubmitter - Topology submission exception: Field storm.zookeeper.servers must be an Iterable of java.lang.String
Exception in thread "main" InvalidTopologyException(msg:Field storm.zookeeper.servers must be an Iterable of java.lang.String)
        at backtype.storm.generated.Nimbus$submitTopology_result.read(Nimbus.java:2466)
        at org.apache.thrift7.TServiceClient.receiveBase(TServiceClient.java:78)
        at backtype.storm.generated.Nimbus$Client.recv_submitTopology(Nimbus.java:162)
        at backtype.storm.generated.Nimbus$Client.submitTopology(Nimbus.java:146)
        at backtype.storm.StormSubmitter.submitTopology(StormSubmitter.java:127)
        at backtype.storm.StormSubmitter.submitTopology(StormSubmitter.java:70)
        at com.cisco.PrimeNumberTopology.main(PrimeNumberTopology.java:40)

Solution:

  

       create a list of zookeeper objects

        List<String> li=new ArrayList<String>();
        li.add("zkserver-1");

        and change the above configuration line:
       
        conf.put(Config.STORM_ZOOKEEPER_SERVERS,li);