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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 gobblin.source.extractor.extract.kafka.KafkaWrapper$KafkaOldAPI.fetchTopicMetadataFromBroker(KafkaWrapper.java:302)	at gobblin.source.extractor.extract.kafka.KafkaWrapper$KafkaOldAPI.fetchTopicMetadataFromBroker(KafkaWrapper.java:281)	at gobblin.source.extractor.extract.kafka.KafkaWrapper$KafkaOldAPI.getFilteredMetadataList(KafkaWrapper.java:268)	at gobblin.source.extractor.extract.kafka.KafkaWrapper$KafkaOldAPI.getFilteredTopics(KafkaWrapper.java:233)	at gobblin.source.extractor.extract.kafka.KafkaWrapper.getFilteredTopics(KafkaWrapper.java:135)	at gobblin.source.extractor.extract.kafka.KafkaSource.getFilteredTopics(KafkaSource.java:381)	at gobblin.source.extractor.extract.kafka.KafkaSource.getWorkunits(KafkaSource.java:105)	at gobblin.runtime.SourceDecorator.getWorkunits(SourceDecorator.java:54)	at gobblin.runtime.AbstractJobLauncher.launchJob(AbstractJobLauncher.java:242)	at gobblin.runtime.mapreduce.CliMRJobLauncher.launchJob(CliMRJobLauncher.java:84)	at gobblin.runtime.mapreduce.CliMRJobLauncher.run(CliMRJobLauncher.java:61)	at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)	at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:84)	at gobblin.runtime.mapreduce.CliMRJobLauncher.main(CliMRJobLauncher.java:106)	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.hadoop.util.RunJar.run(RunJar.java:221)	at org.apache.hadoop.util.RunJar.main(RunJar.java:136)