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java.nio.channels.ClosedChannelException: 	at kafka.network.BlockingChannel.send(BlockingChannel.scala:100)	at kafka.consumer.SimpleConsumer.liftedTree1$1(SimpleConsumer.scala:78)	at kafka.consumer.SimpleConsumer.kafka$consumer$SimpleConsumer$$sendRequest(SimpleConsumer.scala:68)	at kafka.consumer.SimpleConsumer.send(SimpleConsumer.scala:91)	at kafka.javaapi.consumer.SimpleConsumer.send(SimpleConsumer.scala:68)	at cmb.SparkStream.kafka.kafkaOffsetTool.getTopicOffsets(kafkaOffsetTool.java:47)	at cmb.SparkStream.LogClassify.main(LogClassify.java:95)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.lang.reflect.Method.invoke(Method.java:606)	at org.apache.spark.deploy.SparkSubmit$.org$apache$spark$deploy$SparkSubmit$$runMain(SparkSubmit.scala:729)	at org.apache.spark.deploy.SparkSubmit$.doRunMain$1(SparkSubmit.scala:185)	at org.apache.spark.deploy.SparkSubmit$.submit(SparkSubmit.scala:210)	at org.apache.spark.deploy.SparkSubmit$.main(SparkSubmit.scala:124)	at org.apache.spark.deploy.SparkSubmit.main(SparkSubmit.scala)