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Posted to mapreduce-user@hadoop.apache.org by Pedro Costa <ps...@gmail.com> on 2010/11/26 15:07:34 UTC

Can't run randomtextwriter example

Hi,

I'm trying to run the randomtextwriter example, but I gor the following error:

$ bin/hadoop jar hadoop-0.20.2-dev-examples.jar randomtextwriter ~/temp/
Running 10 maps.
Job started: Fri Nov 26 14:05:34 WET 2010
java.io.IOException: No input paths specified in job
        at org.apache.hadoop.mapreduce.lib.input.FileInputFormat.listStatus(FileInputFormat.java:189)
        at org.apache.hadoop.mapreduce.lib.input.FileInputFormat.getSplits(FileInputFormat.java:247)
        at org.apache.hadoop.mapred.JobClient.writeNewSplits(JobClient.java:898)
        at org.apache.hadoop.mapred.JobClient.submitJobInternal(JobClient.java:796)
        at org.apache.hadoop.mapred.JobClient.submitJob(JobClient.java:747)
        at org.apache.hadoop.mapred.JobClient.runJob(JobClient.java:1281)
        at org.apache.hadoop.examples.RandomTextWriter.run(RandomTextWriter.java:238)
        at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65)
        at org.apache.hadoop.examples.RandomTextWriter.main(RandomTextWriter.java:249)
        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.ProgramDriver$ProgramDescription.invoke(ProgramDriver.java:68)
        at org.apache.hadoop.util.ProgramDriver.driver(ProgramDriver.java:139)
        at org.apache.hadoop.examples.ExampleDriver.main(ExampleDriver.java:64)
        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.RunJar.main(RunJar.java:156)

How to run the randomtextwriter example?
-- 
Pedro

Re: Can't run randomtextwriter example

Posted by rahul patodi <pa...@gmail.com>.
you have to specify input path that is a directory where this job write its
output
try this:
*randomtextwriter: "A map/reduce program that writes 10GB of random textual
data per node"

cmd to run:    bin/hadoop jar hadoop-0.20.2-examples.jar randomtextwriter
inputRandom

class name:    randomtextwriter
1st arg:    inputRandom (folder to which output is created*)


-- 
-Thanks and Regards,
Rahul Patodi
Associate Software Engineer,
Impetus Infotech (India) Private Limited,
www.impetus.com
Mob:09907074413

On Fri, Nov 26, 2010 at 7:37 PM, Pedro Costa <ps...@gmail.com> wrote:

> Hi,
>
> I'm trying to run the randomtextwriter example, but I gor the following
> error:
>
> $ bin/hadoop jar hadoop-0.20.2-dev-examples.jar randomtextwriter ~/temp/
> Running 10 maps.
> Job started: Fri Nov 26 14:05:34 WET 2010
> java.io.IOException: No input paths specified in job
>        at
> org.apache.hadoop.mapreduce.lib.input.FileInputFormat.listStatus(FileInputFormat.java:189)
>        at
> org.apache.hadoop.mapreduce.lib.input.FileInputFormat.getSplits(FileInputFormat.java:247)
>        at
> org.apache.hadoop.mapred.JobClient.writeNewSplits(JobClient.java:898)
>        at
> org.apache.hadoop.mapred.JobClient.submitJobInternal(JobClient.java:796)
>        at org.apache.hadoop.mapred.JobClient.submitJob(JobClient.java:747)
>        at org.apache.hadoop.mapred.JobClient.runJob(JobClient.java:1281)
>        at
> org.apache.hadoop.examples.RandomTextWriter.run(RandomTextWriter.java:238)
>        at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65)
>        at
> org.apache.hadoop.examples.RandomTextWriter.main(RandomTextWriter.java:249)
>        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.ProgramDriver$ProgramDescription.invoke(ProgramDriver.java:68)
>        at
> org.apache.hadoop.util.ProgramDriver.driver(ProgramDriver.java:139)
>        at
> org.apache.hadoop.examples.ExampleDriver.main(ExampleDriver.java:64)
>        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.RunJar.main(RunJar.java:156)
>
> How to run the randomtextwriter example?
> --
> Pedro
>