title: Gremlin: Encountered unregistered class ID: 10
body: <p>I am running gremlin with Titan-Cassandra as Back-end. Whenever I run g.v.map it gives me a weird error, any idea what is causing this problem.</p>
  
  <p>Encountered unregistered class ID: 10
  Serialization trace:</p>
  
  <pre><code>value (com.thinkaurelius.titan.graphdb.types.TypeAttribute)
  Display stack trace? [yN] y
  com.esotericsoftware.kryo.KryoException: Encountered unregistered class ID: 10
  Serialization trace:
  value (com.thinkaurelius.titan.graphdb.types.TypeAttribute)
      at com.esotericsoftware.kryo.util.DefaultClassResolver.readClass(DefaultClassResolver.java:119)
      at com.esotericsoftware.kryo.Kryo.readClass(Kryo.java:610)
      at com.esotericsoftware.kryo.serializers.FieldSerializer$ObjectField.read(FieldSerializer.java:599)
      at com.esotericsoftware.kryo.serializers.FieldSerializer.read(FieldSerializer.java:221)
      at com.esotericsoftware.kryo.Kryo.readObject(Kryo.java:626)
  </code></pre>