java.io.IOException: Type mismatch in key from map: expected org.apache.hadoop.io.Text, recieved org.apache.hadoop.io.LongWritable
	at org.apache.hadoop.mapred.MapTask$MapOutputBuffer.collect(MapTask.java:870)
	at org.apache.hadoop.mapred.MapTask$OldOutputCollector.collect(MapTask.java:498)
	at org.apache.hadoop.mapred.lib.IdentityMapper.map(IdentityMapper.java:38)
	at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:50)
	at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:390)
	at org.apache.hadoop.mapred.MapTask.run(MapTask.java:324)
	at org.apache.hadoop.mapred.Child$4.run(Child.java:240)
	at java.security.AccessController.doPrivileged(Native Method)
	at javax.security.auth.Subject.doAs(Subject.java:396)
	at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1115)
	at org.apache.hadoop.mapred.Child.main(Child.java:234)