I have working with hadoop on single node. I am new with hadoop so please bear with me.
I have used tutorial "<http://www.michael-noll.com/tutorials/running-hadoop-on-ubuntu-linux-single-node-cluster/> " and "<https://sites.google.com/site/jianpengxu/tutorials/hadoop-setup>" to install the hadoop.
Command jps shows that hadoop nodes are up and running.

when I try to run the wordcount (for example) 

```
"bin/hadoop jar hadoop-0.20.2-examples.jar wordcount gutenberg gutenberg-output"
i got the error message
"14/01/29 14:22:52 INFO input.FileInputFormat: Total input paths to process : 1
14/01/29 14:22:52 INFO mapred.JobClient: Running job: job_201401241441_0013
14/01/29 14:22:53 INFO mapred.JobClient:  map 0% reduce 0%
14/01/29 14:23:02 INFO mapred.JobClient: Task Id : attempt_201401241441_0013_m_000000_0, Status : FAILED
java.lang.ClassCastException: org.apache.hadoop.mapreduce.lib.input.FileSplit cannot be cast to org.apache.hadoop.mapred.InputSplit
    at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:323)
    at org.apache.hadoop.mapred.MapTask.run(MapTask.java:307)
    at org.apache.hadoop.mapred.Child.main(Child.java:170)

14/01/29 14:23:08 INFO mapred.JobClient: Task Id : attempt_201401241441_0013_m_000000_1, Status : FAILED
java.lang.ClassCastException: org.apache.hadoop.mapreduce.lib.input.FileSplit cannot be cast to org.apache.hadoop.mapred.InputSplit
    at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:323)
    at org.apache.hadoop.mapred.MapTask.run(MapTask.java:307)
    at org.apache.hadoop.mapred.Child.main(Child.java:170)

14/01/29 14:23:14 INFO mapred.JobClient: Task Id : attempt_201401241441_0013_m_000000_2, Status : FAILED
java.lang.ClassCastException: org.apache.hadoop.mapreduce.lib.input.FileSplit cannot be cast to org.apache.hadoop.mapred.InputSplit
    at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:323)
    at org.apache.hadoop.mapred.MapTask.run(MapTask.java:307)
    at org.apache.hadoop.mapred.Child.main(Child.java:170)

14/01/29 14:23:23 INFO mapred.JobClient: Job complete: job_201401241441_0013
14/01/29 14:23:23 INFO mapred.JobClient: Counters: 3
14/01/29 14:23:23 INFO mapred.JobClient:   Job Counters 
14/01/29 14:23:23 INFO mapred.JobClient:     Launched map tasks=4
14/01/29 14:23:23 INFO mapred.JobClient:     Data-local map tasks=4
14/01/29 14:23:23 INFO mapred.JobClient:     Failed map tasks=1"

```

Can you please give me idea how to solve this issue. 
I will appreciate your help.
Regards,