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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
>