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From Ramaswamy B.A <ramaswam...@persistent.co.in>
Subject Failing to executing the the C++ program - /home/ramaswamy_a/hadoop/src/examples/pipes/impl/wordcount-simple.cc in Hadoop -- Need help
Date Fri, 14 Aug 2009 13:31:47 GMT
Hi All,

I am trying to execute a C++ wordcount-smaple.cc program which is exist
in hadoop package. Built went fine with ant, but execution  failed,
throws the following errors.

[ramaswamy_a@ps259 hadoop]$./bin/hadoop pipes
-program /home/ramaswamy_a/Rama/Hadoop/hadoop/hadoop-0.18.3/build/c
++-examples/Linux-i386-32/bin/pipes-sort  -input input  -output output
09/08/14 18:07:00 INFO jvm.JvmMetrics: Initializing JVM Metrics with
processName=JobTracker, sessionId=
09/08/14 18:07:00 WARN mapred.JobClient: Use GenericOptionsParser for
parsing the arguments. Applications should implement Tool for the same.
09/08/14 18:07:00 WARN mapred.JobClient: No job jar file set.  User
classes may not be found. See JobConf(Class) or JobConf#setJar(String).
09/08/14 18:07:00 INFO mapred.FileInputFormat: Total input paths to
process : 2
09/08/14 18:07:00 INFO mapred.FileInputFormat: Total input paths to
process : 2
09/08/14 18:07:01 INFO mapred.FileInputFormat: Total input paths to
process : 2
09/08/14 18:07:01 INFO mapred.FileInputFormat: Total input paths to
process : 2
09/08/14 18:07:01 INFO mapred.JobClient: Running job: job_local_0001
09/08/14 18:07:01 INFO mapred.MapTask: numReduceTasks: 1
09/08/14 18:07:01 INFO mapred.MapTask: io.sort.mb = 100
09/08/14 18:07:01 INFO mapred.MapTask: data buffer = 79691776/99614720
09/08/14 18:07:01 INFO mapred.MapTask: record buffer = 262144/327680
09/08/14 18:07:02 WARN mapred.LocalJobRunner: job_local_0001
java.lang.NullPointerException
at
org.apache.hadoop.mapred.pipes.Application.<init>(Application.java:80)
at
org.apache.hadoop.mapred.pipes.PipesMapRunner.run(PipesMapRunner.java:57)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:227)
at org.apache.hadoop.mapred.LocalJobRunner
$Job.run(LocalJobRunner.java:157)
Exception in thread "main" java.io.IOException: Job failed!
at org.apache.hadoop.mapred.JobClient.runJob(JobClient.java:1113)
at
org.apache.hadoop.mapred.pipes.Submitter.submitJob(Submitter.java:261)
at org.apache.hadoop.mapred.pipes.Submitter.main(Submitter.java:417)
[ramaswamy_a@ps25 hadoop]$ 

It seems the the JobConf  is not set. 

Please let me know how to set the Jobconf what should be the values for
this.

With my setup  I can run  Java programs.


My Observations:
The
program /home/ramaswamy_a/hadoop/src/examples/pipes/impl/wordcount-simple.cc  is including
the file /home/ramaswamy_a/hadoop/c++/Linux-i386-32/include/hadoop/Pipes.hh.

Pipes.hh contains JobConf which is an abstract class.
Is it needed  to write to our own JobConf  by inheriting the
Pipes.hh:JobConf class?


Please suggest me 

Thanks and Regards
Ramaswamy . B.A 



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