Databases
StackOverflow2013
Postsdbo
PORunning the Python Code on Hadoop Failed
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PORunning the Python Code on Hadoop Failed
    primarykey
    data
    text
    <p>I have tried to follow the instructions on this page: <a href="http://www.michael-noll.com/tutorials/writing-an-hadoop-mapreduce-program-in-python/" rel="noreferrer">http://www.michael-noll.com/tutorials/writing-an-hadoop-mapreduce-program-in-python/</a></p> <pre><code>$bin/hadoop jar contrib/streaming/hadoop-streaming-1.0.4.jar -input /user/root/wordcountpythontxt -output /user/root/wordcountpythontxt-output -mapper /user/root/wordcountpython/mapper.py -reducer /user/root/wordcountpython/reducer.py -file /user/root/mapper.py -file /user/root/reducer.py </code></pre> <p>It says</p> <pre><code>File: /user/root/mapper.py does not exist, or is not readable. Streaming Command Fail </code></pre> <p>When i browsed through the url:jobdetails.jsp/</p> <p>i found lot of exception</p> <pre><code>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:432) at org.apache.hadoop.mapred.MapTask.run(MapTask.java:372) at org.apache.hadoop.mapred.Child$4.run(Child.java:255) 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:1121) at org.apache.hadoop.mapred.Child.main(Child.java:249) 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 "/user/root/wordcountpython/mapper.py": 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: error=2, No such file or directory at java.lang.UNIXProcess.forkAndExec(Native Method) at java.lang.UNIXProcess.&lt;init&gt;(UNIXProcess.java:53) at java.lang.ProcessImpl.start(ProcessImpl.java:91) at java.lang.ProcessBuilder.start(ProcessBuilder.java:453) ... 24 more </code></pre> <p>i am not able to fix it out pls help me to run the python pgm.</p>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USUnmesha SreeVeni
    1. USUnmesha SreeVeni
    plurals
    1. PL
      singulars
      1. LTLinked
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    2. PO
      singulars
      1. PTAnswer
    3. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. PORunning the Python Code on Hadoop Failed
      1. This table or related slice is empty.
      1. VTUpMod
    1. This table or related slice is empty.
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload