we are getting the following error/warning while running wordcount program on hadoop 2 node cluster with one master and one slave...
arpit@arpit:~/hadoop-1.0.3$ bin/hadoop jar hadoop-examples-1.0.3.jar wordcount /Input /Output WARNING: org.apache.hadoop.metrics.jvm.EventCounter is deprecated. Please use org.apache.hadoop.log.metrics.EventCounter in all the log4j.properties files. 13/04/09 13:51:56 INFO input.FileInputFormat: Total input paths to process : 3 13/04/09 13:51:56 INFO util.NativeCodeLoader: Loaded the native-hadoop library 13/04/09 13:51:56 WARN snappy.LoadSnappy: Snappy native library not loaded 13/04/09 13:51:57 INFO mapred.JobClient: Running job: job_201304091351_0001 13/04/09 13:51:58 INFO mapred.JobClient: map 0% reduce 0% 13/04/09 13:52:13 INFO mapred.JobClient: map 66% reduce 0% 13/04/09 13:52:16 INFO mapred.JobClient: map 100% reduce 0% 13/04/09 13:52:22 INFO mapred.JobClient: map 100% reduce 22% 13/04/09 13:59:47 INFO mapred.JobClient: map 100% reduce 0% 13/04/09 13:59:52 INFO mapred.JobClient: Task Id : attempt_201304091351_0001_r_000000_0, Status : FAILED Shuffle Error: Exceeded MAX_FAILED_UNIQUE_FETCHES; bailing-out. 13/04/09 13:59:52 WARN mapred.JobClient: Error reading task outputhadoop 13/04/09 13:59:52 WARN mapred.JobClient: Error reading task outputhadoop 13/04/09 14:00:05 INFO mapred.JobClient: map 100% reduce 11% what can be the possible solution.... is it the fault of setup or anything else.... please help
