hadoop MultipleInputs fails with ClassCastException

Question

My hadoop version is 1.0.3,when I use multipleinputs, I got this error.

java.lang.ClassCastException: org.apache.hadoop.mapreduce.lib.input.TaggedInputSplit         


        

Answer 1

I had this same problem, but the actual problem was that I was still setting the InputFormat after setting up the MultipleInputs:

job.setInputFormatClass(SequenceFileInputFormat.class);

Once I removed this line everything worked fine.