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head of empty list
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java.util.NoSuchElementException: head of empty list	at scala.collection.immutable.Nil$.head(List.scala:386)	at scala.collection.immutable.Nil$.head(List.scala:383)	at kafka.api.TopicMetadataRequest$$anonfun$readFrom$2.apply(TopicMetadataRequest.scala:43)	at kafka.api.TopicMetadataRequest$$anonfun$readFrom$2.apply(TopicMetadataRequest.scala:43)	at kafka.utils.Logging$class.debug(Logging.scala:51)	at kafka.api.TopicMetadataRequest$.debug(TopicMetadataRequest.scala:25)	at kafka.api.TopicMetadataRequest$.readFrom(TopicMetadataRequest.scala:43)	at kafka.api.RequestKeys$$anonfun$4.apply(RequestKeys.scala:37)	at kafka.api.RequestKeys$$anonfun$4.apply(RequestKeys.scala:37)	at kafka.network.RequestChannel$Request.(RequestChannel.scala:47)	at kafka.network.Processor.read(SocketServer.scala:320)	at kafka.network.Processor.run(SocketServer.scala:231)	at java.lang.Thread.run(Thread.java:680)