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java.nio.channels.ClosedChannelException: 	at kafka.network.BlockingChannel.send(BlockingChannel.scala:100)	at kafka.producer.SyncProducer.liftedTree1$1(SyncProducer.scala:73)	at kafka.producer.SyncProducer.kafka$producer$SyncProducer$$doSend(SyncProducer.scala:72)	at kafka.producer.SyncProducer$$anonfun$send$1$$anonfun$apply$mcV$sp$1.apply$mcV$sp(SyncProducer.scala:103)	at kafka.producer.SyncProducer$$anonfun$send$1$$anonfun$apply$mcV$sp$1.apply(SyncProducer.scala:103)	at kafka.producer.SyncProducer$$anonfun$send$1$$anonfun$apply$mcV$sp$1.apply(SyncProducer.scala:103)	at kafka.metrics.KafkaTimer.time(KafkaTimer.scala:33)	at kafka.producer.SyncProducer$$anonfun$send$1.apply$mcV$sp(SyncProducer.scala:102)	at kafka.producer.SyncProducer$$anonfun$send$1.apply(SyncProducer.scala:102)	at kafka.producer.SyncProducer$$anonfun$send$1.apply(SyncProducer.scala:102)	at kafka.metrics.KafkaTimer.time(KafkaTimer.scala:33)	at kafka.producer.SyncProducer.send(SyncProducer.scala:101)	at kafka.producer.async.DefaultEventHandler.kafka$producer$async$DefaultEventHandler$$send(DefaultEventHandler.scala:255)	at kafka.producer.async.DefaultEventHandler$$anonfun$dispatchSerializedData$2.apply(DefaultEventHandler.scala:106)	at kafka.producer.async.DefaultEventHandler$$anonfun$dispatchSerializedData$2.apply(DefaultEventHandler.scala:100)	at scala.collection.TraversableLike$WithFilter$$anonfun$foreach$1.apply(TraversableLike.scala:772)	at scala.collection.mutable.HashMap$$anonfun$foreach$1.apply(HashMap.scala:98)	at scala.collection.mutable.HashMap$$anonfun$foreach$1.apply(HashMap.scala:98)	at scala.collection.mutable.HashTable$class.foreachEntry(HashTable.scala:226)	at scala.collection.mutable.HashMap.foreachEntry(HashMap.scala:39)	at scala.collection.mutable.HashMap.foreach(HashMap.scala:98)	at scala.collection.TraversableLike$WithFilter.foreach(TraversableLike.scala:771)	at kafka.producer.async.DefaultEventHandler.dispatchSerializedData(DefaultEventHandler.scala:100)	at kafka.producer.async.DefaultEventHandler.handle(DefaultEventHandler.scala:72)	at kafka.producer.async.ProducerSendThread.tryToHandle(ProducerSendThread.scala:105)	at kafka.producer.async.ProducerSendThread$$anonfun$processEvents$3.apply(ProducerSendThread.scala:88)	at kafka.producer.async.ProducerSendThread$$anonfun$processEvents$3.apply(ProducerSendThread.scala:68)	at scala.collection.immutable.Stream.foreach(Stream.scala:547)	at kafka.producer.async.ProducerSendThread.processEvents(ProducerSendThread.scala:67)	at kafka.producer.async.ProducerSendThread.run(ProducerSendThread.scala:45)