HI, I get this, did anyone know why I get an Error? I use the hadoop 0.21.0
12/01/17 14:43:43 INFO security.Groups: Group mapping impl=org.apache.hadoop.security.ShellBasedUnixGroupsMapping; cacheTimeout=300000 12/01/17 14:43:43 WARN conf.Configuration: mapred.task.id is deprecated. Instead, use mapreduce.task.attempt.id 12/01/17 14:43:44 WARN mapreduce.JobSubmitter: Use GenericOptionsParser for parsing the arguments. Applications should implement Tool for the same. 12/01/17 14:43:44 INFO input.FileInputFormat: Total input paths to process : 1 12/01/17 14:43:44 WARN conf.Configuration: mapred.map.tasks is deprecated. Instead, use mapreduce.job.maps 12/01/17 14:43:44 INFO mapreduce.JobSubmitter: number of splits:1 12/01/17 14:43:44 INFO mapreduce.JobSubmitter: adding the following namenodes' delegation tokens:null 12/01/17 14:43:44 INFO mapreduce.Job: Running job: job_201201171433_0005 12/01/17 14:43:45 INFO mapreduce.Job: map 0% reduce 0% 12/01/17 14:44:00 INFO mapreduce.Job: Task Id : attempt_201201171433_0005_m_000000_0, Status : FAILED Error: Found interface org.apache.hadoop.mapreduce.TaskAttemptContext, but class was expected 12/01/17 14:44:09 INFO mapreduce.Job: Task Id : attempt_201201171433_0005_m_000000_1, Status : FAILED Error: Found interface org.apache.hadoop.mapreduce.TaskAttemptContext, but class was expected 12/01/17 14:44:19 INFO mapreduce.Job: Task Id : attempt_201201171433_0005_m_000000_2, Status : FAILED Error: Found interface org.apache.hadoop.mapreduce.TaskAttemptContext, but class was expected 12/01/17 14:44:31 INFO mapreduce.Job: Job complete: job_201201171433_0005 12/01/17 14:44:31 INFO mapreduce.Job: Counters: 7 Job Counters Data-local map tasks=4 Total time spent by all maps waiting after reserving slots (ms)=0 Total time spent by all reduces waiting after reserving slots (ms)=0 Failed map tasks=1 SLOTS_MILLIS_MAPS=8517 SLOTS_MILLIS_REDUCES=0 Launched map tasks=4
