java.lang.AssertionError: assertion failed

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assertion failed
java.lang.AssertionError: assertion failed
at scala.Predef$.assert(Predef.scala:165)
at kafka.consumer.TopicCount$$anonfun$makeConsumerThreadIdsPerTopic$2.apply(TopicCount.scala:36)
at scala.collection.TraversableLike$WithFilter$$anonfun$foreach$1.apply(TraversableLike.scala:772)
at scala.collection.immutable.Map$Map1.foreach(Map.scala:109)
at kafka.consumer.TopicCount$class.makeConsumerThreadIdsPerTopic(TopicCount.scala:34)
at kafka.consumer.StaticTopicCount.makeConsumerThreadIdsPerTopic(TopicCount.scala:100)
at kafka.consumer.StaticTopicCount.getConsumerThreadIdsPerTopic(TopicCount.scala:104)
at kafka.consumer.ZookeeperConsumerConnector.consume(ZookeeperConsumerConnector.scala:198)
at kafka.consumer.ZookeeperConsumerConnector.createMessageStreams(ZookeeperConsumerConnector.scala:138)
at org.apache.spark.streaming.receiver.ReceiverSupervisor.startReceiver(ReceiverSupervisor.scala:148)
at org.apache.spark.streaming.receiver.ReceiverSupervisor.start(ReceiverSupervisor.scala:130)
at org.apache.spark.streaming.scheduler.ReceiverTracker$ReceiverTrackerEndpoint$$anonfun$9.apply(ReceiverTracker.scala:542)
at org.apache.spark.SparkContext$$anonfun$37.apply(SparkContext.scala:1986)
at org.apache.spark.SparkContext$$anonfun$37.apply(SparkContext.scala:1986)
at org.apache.spark.scheduler.ResultTask.runTask(ResultTask.scala:66)
at org.apache.spark.scheduler.Task.run(Task.scala:88)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)

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