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via Google Groups by Mateusz Berezecki, 2 years ago
This exception has no message.
java.lang.NullPointerException: 	at org.apache.hadoop.mapred.MapTask$TrackedRecordReader.close(MapTask.java:210)	at org.apache.hadoop.mapred.MapTask.closeQuietly(MapTask.java:1976)	at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:468)	at org.apache.hadoop.mapred.MapTask.run(MapTask.java:343)	at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:164)	at java.security.AccessController.doPrivileged(Native Method)	at javax.security.auth.Subject.doAs(Subject.java:415)	at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1693)	at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:158)