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java.lang.NullPointerException: 	at scala.collection.convert.Wrappers$JMapWrapperLike$$anon$2.(Wrappers.scala:265)	at scala.collection.convert.Wrappers$JMapWrapperLike$class.iterator(Wrappers.scala:264)	at scala.collection.convert.Wrappers$JMapWrapper.iterator(Wrappers.scala:275)	at scala.collection.IterableLike$class.foreach(IterableLike.scala:72)	at scala.collection.AbstractIterable.foreach(Iterable.scala:54)	at scala.collection.TraversableOnce$class.foldLeft(TraversableOnce.scala:144)	at scala.collection.AbstractTraversable.foldLeft(Traversable.scala:105)	at scala.collection.TraversableOnce$class.$div$colon(TraversableOnce.scala:138)	at scala.collection.AbstractTraversable.$div$colon(Traversable.scala:105)	at scala.collection.immutable.MapLike$class.$plus$plus(MapLike.scala:87)	at scala.collection.immutable.AbstractMap.$plus$plus(Map.scala:187)	at kafka.javaapi.consumer.ZookeeperConsumerConnector.createMessageStreams(ZookeeperConsumerConnector.scala:83)	at kafka.javaapi.consumer.ZookeeperConsumerConnector.createMessageStreams(ZookeeperConsumerConnector.scala:97)	at com.ctrip.ops.sysdev.inputs.Kafka.emit(Kafka.java:128)	at com.ctrip.ops.sysdev.Main.main(Main.java:109)