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java.io.IOException: Filesystem closed	at org.apache.hadoop.hdfs.DFSClient.checkOpen(DFSClient.java:689)	at org.apache.hadoop.hdfs.DFSInputStream.close(DFSInputStream.java:617)	at java.io.FilterInputStream.close(FilterInputStream.java:181)	at org.apache.hadoop.util.LineReader.close(LineReader.java:150)	at org.apache.hadoop.mapreduce.lib.input.LineRecordReader.close(LineRecordReader.java:193)	at org.apache.hadoop.mapred.MapTask$NewTrackingRecordReader.close(MapTask.java:500)	at org.apache.hadoop.mapred.MapTask.closeQuietly(MapTask.java:1973)	at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:773)	at org.apache.hadoop.mapred.MapTask.run(MapTask.java:340)	at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:168)	at java.security.AccessController.doPrivileged(Native Method)	at javax.security.auth.Subject.doAs(Subject.java:422)	at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1548)	at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:163)