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Re: Error while using the Hadoop Streaming
Hi,

In your first mail you were using "/usr/bin/python" binary file just after
"- mapper", I don't think we need python executable to run this example.

Make sure that you are using correct path of you files "mapper.py and
reducer.py"  while executing.
~Thanks

On Fri, May 24, 2013 at 11:31 PM, Adamantios Corais <
[EMAIL PROTECTED]> wrote:

> Hi,
>
> Thanks a lot for your response.
>
> Unfortunately, I run into the same problem though.
>
> What do you mean by "python binary"? This is what I have in the very first
> line of both scripts: #!/usr/bin/python
>
> Any ideas?
>
>
> On Fri, May 24, 2013 at 7:41 PM, Jitendra Yadav <
> [EMAIL PROTECTED]> wrote:
>
>> Hi,
>>
>> I have run Michael's python map reduce example several times without any
>> issue.
>>
>> I think this issue is related to your file path 'mapper.py'.  you are
>> using python binary?
>>
>> try this,
>>
>> hadoop jar
>> /home/yyy/Dropbox/Private/xxx/Projects/task_week_22/hadoop-streaming-1.1.2.jar
>> \
>>  -input /user/yyy/20417-8.txt \
>> -output /user/yyy/output \
>>  -file /home/yyy/Dropbox/Private/xxx/Projects/task_week_22/mapper.py \
>> -mapper /home/yyy/Dropbox/Private/xxx/Projects/task_week_22/mapper.py \
>>  -file /home/yyy/Dropbox/Private/xxx/Projects/task_week_22/reducer.py \
>> -reducer /home/yyy/Dropbox/Private/xxx/Projects/task_week_22/reducer.py
>>
>>
>> Thanks~
>>
>> On Fri, May 24, 2013 at 10:12 PM, Adamantios Corais <
>> [EMAIL PROTECTED]> wrote:
>>
>>> I tried this nice example:
>>> http://www.michael-noll.com/tutorials/writing-an-hadoop-mapreduce-program-in-python/
>>>
>>> The python scripts work pretty fine from my laptop (through terminal),
>>> but they don't when I execute them on the CDH3 (Pseudo-Distributed Mode).
>>>
>>> Any ideas?
>>>
>>> hadoop jar
>>> /home/yyy/Dropbox/Private/xxx/Projects/task_week_22/hadoop-streaming-1.1.2.jar
>>> \
>>> -input /user/yyy/20417-8.txt \
>>> -output /user/yyy/output \
>>> -file /usr/bin/python
>>> /home/yyy/Dropbox/Private/xxx/Projects/task_week_22/mapper.py \
>>> -mapper /usr/bin/python
>>> /home/yyy/Dropbox/Private/xxx/Projects/task_week_22/mapper.py \
>>> -file /home/yyy/Dropbox/Private/xxx/Projects/task_week_22/reducer.py \
>>> -reducer /home/yyy/Dropbox/Private/xxx/Projects/task_week_22/reducer.py
>>>
>>> -----------------------
>>>
>>> 2013-05-24 18:21:12,232 INFO org.apache.hadoop.util.NativeCodeLoader:
>>> Loaded the native-hadoop library
>>> 2013-05-24 18:21:12,569 INFO
>>> org.apache.hadoop.filecache.TrackerDistributedCacheManager: Creating
>>> symlink:
>>> /var/lib/hadoop-0.20/cache/mapred/mapred/local/taskTracker/yyy/jobcache/job_201305160832_0020/jars/job.jar
>>> <-
>>> /var/lib/hadoop-0.20/cache/mapred/mapred/local/taskTracker/yyy/jobcache/job_201305160832_0020/attempt_201305160832_0020_m_000000_0/work/job.jar
>>> 2013-05-24 18:21:12,586 INFO
>>> org.apache.hadoop.filecache.TrackerDistributedCacheManager: Creating
>>> symlink:
>>> /var/lib/hadoop-0.20/cache/mapred/mapred/local/taskTracker/yyy/jobcache/job_201305160832_0020/jars/.job.jar.crc
>>> <-
>>> /var/lib/hadoop-0.20/cache/mapred/mapred/local/taskTracker/yyy/jobcache/job_201305160832_0020/attempt_201305160832_0020_m_000000_0/work/.job.jar.crc
>>> 2013-05-24 18:21:12,717 INFO org.apache.hadoop.metrics.jvm.JvmMetrics:
>>> Initializing JVM Metrics with processName=MAP, sessionId>>> 2013-05-24 18:21:13,062 INFO org.apache.hadoop.util.ProcessTree: setsid
>>> exited with exit code 0
>>> 2013-05-24 18:21:13,087 INFO org.apache.hadoop.mapred.Task:  Using
>>> ResourceCalculatorPlugin :
>>> org.apache.hadoop.util.LinuxResourceCalculatorPlugin@1358f03
>>> 2013-05-24 18:21:13,452 WARN
>>> org.apache.hadoop.io.compress.snappy.LoadSnappy: Snappy native library is
>>> available
>>> 2013-05-24 18:21:13,452 INFO
>>> org.apache.hadoop.io.compress.snappy.LoadSnappy: Snappy native library
>>> loaded
>>> 2013-05-24 18:21:13,464 INFO org.apache.hadoop.mapred.MapTask:
>>> numReduceTasks: 1
>>> 2013-05-24 18:21:13,477 INFO org.apache.hadoop.mapred.MapTask: