I am trying to use Hadoop streaming with python scripts, but unfortunately I am getting following error:
14/08/23 13:31:50 INFO streaming.StreamJob: To kill this job, run:
14/08/23 13:31:50 INFO streaming.StreamJob: UNDEF/bin/hadoop job -Dmapred.job.tracker=localhost.localdomain:8021 -kill job_201408210627_0018
14/08/23 13:31:50 INFO streaming.StreamJob: Tracking URL: http://0.0.0.0:50030/jobdetails.jsp?jobid=job_201408210627_0018
14/08/23 13:31:51 INFO streaming.StreamJob: map 0% reduce 0%
14/08/23 13:32:17 INFO streaming.StreamJob: map 100% reduce 100%
14/08/23 13:32:17 INFO streaming.StreamJob: To kill this job, run:
14/08/23 13:32:17 INFO streaming.StreamJob: UNDEF/bin/hadoop job -Dmapred.job.tracker=localhost.localdomain:8021 -kill job_201408210627_0018
14/08/23 13:32:17 INFO streaming.StreamJob: Tracking URL: http://0.0.0.0:50030/jobdetails.jsp?jobid=job_201408210627_0018
14/08/23 13:32:17 ERROR streaming.StreamJob: Job not successful. Error: NA
14/08/23 13:32:17 INFO streaming.StreamJob: killJob...
Streaming Command Failed!
I am trying to run following command:
hadoop jar /usr/lib/hadoop-0.20-mapreduce/contrib/streaming/hadoop-streaming-2.0.0-mr1-cdh4.7.0.jar -input "/user/cloudera/vecs" -output "/user/cloudera/vecs_output" -file /home/cloudera/vects/streaming/mapper.py -mapper mapper.py -file /home/cloudera/vects/streaming/reducer.py -reducer reducer.py -jobconf mapred.map.tasks=20 -jobconf mapred.reduce.tasks=1
When I look into the job seetup I can see:
java.lang.Throwable: Child Error
at org.apache.hadoop.mapred.TaskRunner.run(TaskRunner.java:250)
Caused by: java.io.IOException: Task process exit with nonzero status of 1.
at org.apache.hadoop.mapred.TaskRunner.run(TaskRunner.java:237)
Everything seems to work well when I try to run my code without hadoop with command:
head -100 ./data/vecs.txt|./streaming/mapper.py|./streaming/reducer.py
I have also read through this post and I have #! /usr/bin/env python2.7 as the first line of my python files.
Does anyone has idea what can possibly be wrong? Thank you in advance for any suggestions and answers.
