Error: Found interface org.apache.hadoop.mapreduce.TaskAttemptContext, but class was expected

[Paulo Eduardo Boeira Capeller <pc...@gmail.com>]

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