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From Adamantios Corais <adamantios.cor...@gmail.com>
Subject Re: Error while using the Hadoop Streaming
Date Fri, 24 May 2013 18:01:07 GMT
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
<jeetuyadav200890@gmail.com>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 <
> adamantios.corais@gmail.com> 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: io.sort.mb
>> = 100
>> 2013-05-24 18:21:13,635 INFO org.apache.hadoop.mapred.MapTask: data
>> buffer = 79691776/99614720
>> 2013-05-24 18:21:13,635 INFO org.apache.hadoop.mapred.MapTask: record
>> buffer = 262144/327680
>> 2013-05-24 18:21:13,724 INFO org.mortbay.log: Logging to
>> org.slf4j.impl.Log4jLoggerAdapter(org.mortbay.log) via
>> org.mortbay.log.Slf4jLog
>> 2013-05-24 18:21:13,733 INFO org.apache.hadoop.streaming.PipeMapRed:
>> PipeMapRed exec [mapper.py]
>> 2013-05-24 18:21:13,783 ERROR org.apache.hadoop.streaming.PipeMapRed:
>> configuration exception
>> java.io.IOException: Cannot run program "mapper.py": java.io.IOException:
>> error=2, No such file or directory
>>     at java.lang.ProcessBuilder.start(ProcessBuilder.java:460)
>>     at
>> org.apache.hadoop.streaming.PipeMapRed.configure(PipeMapRed.java:214)
>>     at
>> org.apache.hadoop.streaming.PipeMapper.configure(PipeMapper.java:66)
>>     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>>     at
>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>>     at
>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>>     at java.lang.reflect.Method.invoke(Method.java:597)
>>     at
>> org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:88)
>>     at
>> org.apache.hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:64)
>>     at
>> org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:117)
>>     at org.apache.hadoop.mapred.MapRunner.configure(MapRunner.java:34)
>>     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>>     at
>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>>     at
>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>>     at java.lang.reflect.Method.invoke(Method.java:597)
>>     at
>> org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:88)
>>     at
>> org.apache.hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:64)
>>     at
>> org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:117)
>>     at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:387)
>>     at org.apache.hadoop.mapred.MapTask.run(MapTask.java:325)
>>     at org.apache.hadoop.mapred.Child$4.run(Child.java:266)
>>     at java.security.AccessController.doPrivileged(Native Method)
>>     at javax.security.auth.Subject.doAs(Subject.java:396)
>>     at
>> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1278)
>>     at org.apache.hadoop.mapred.Child.main(Child.java:260)
>> Caused by: java.io.IOException: java.io.IOException: error=2, No such
>> file or directory
>>     at java.lang.UNIXProcess.<init>(UNIXProcess.java:148)
>>     at java.lang.ProcessImpl.start(ProcessImpl.java:65)
>>     at java.lang.ProcessBuilder.start(ProcessBuilder.java:453)
>>     ... 24 more
>> 2013-05-24 18:21:13,869 INFO org.apache.hadoop.mapred.TaskLogsTruncater:
>> Initializing logs' truncater with mapRetainSize=-1 and reduceRetainSize=-1
>> 2013-05-24 18:21:13,871 WARN org.apache.hadoop.mapred.Child: Error
>> running child
>> java.lang.RuntimeException: Error in configuring object
>>     at
>> org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:93)
>>     at
>> org.apache.hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:64)
>>     at
>> org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:117)
>>     at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:387)
>>     at org.apache.hadoop.mapred.MapTask.run(MapTask.java:325)
>>     at org.apache.hadoop.mapred.Child$4.run(Child.java:266)
>>     at java.security.AccessController.doPrivileged(Native Method)
>>     at javax.security.auth.Subject.doAs(Subject.java:396)
>>     at
>> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1278)
>>     at org.apache.hadoop.mapred.Child.main(Child.java:260)
>> Caused by: java.lang.reflect.InvocationTargetException
>>     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>>     at
>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>>     at
>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>>     at java.lang.reflect.Method.invoke(Method.java:597)
>>     at
>> org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:88)
>>     ... 9 more
>> Caused by: java.lang.RuntimeException: Error in configuring object
>>     at
>> org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:93)
>>     at
>> org.apache.hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:64)
>>     at
>> org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:117)
>>     at org.apache.hadoop.mapred.MapRunner.configure(MapRunner.java:34)
>>     ... 14 more
>> Caused by: java.lang.reflect.InvocationTargetException
>>     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>>     at
>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>>     at
>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>>     at java.lang.reflect.Method.invoke(Method.java:597)
>>     at
>> org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:88)
>>     ... 17 more
>> Caused by: java.lang.RuntimeException: configuration exception
>>     at
>> org.apache.hadoop.streaming.PipeMapRed.configure(PipeMapRed.java:230)
>>     at
>> org.apache.hadoop.streaming.PipeMapper.configure(PipeMapper.java:66)
>>     ... 22 more
>> Caused by: java.io.IOException: Cannot run program "mapper.py":
>> java.io.IOException: error=2, No such file or directory
>>     at java.lang.ProcessBuilder.start(ProcessBuilder.java:460)
>>     at
>> org.apache.hadoop.streaming.PipeMapRed.configure(PipeMapRed.java:214)
>>     ... 23 more
>> Caused by: java.io.IOException: java.io.IOException: error=2, No such
>> file or directory
>>     at java.lang.UNIXProcess.<init>(UNIXProcess.java:148)
>>     at java.lang.ProcessImpl.start(ProcessImpl.java:65)
>>     at java.lang.ProcessBuilder.start(ProcessBuilder.java:453)
>>     ... 24 more
>> 2013-05-24 18:21:13,879 INFO org.apache.hadoop.mapred.Task: Runnning
>> cleanup for the task
>>
>
>

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