Grep example does not run with eclipse ..

[Pritam Kanchan <pr...@crlindia.com>]

Hi,

I am new to this group.
I have compiled hadoop-0.15.3 with eclipse on my Fedora system .
*I am able to run the example for grep through command prompt successfully.*
(bin/hadoop jar hadoop-0.15.3-examples.jar grep Wdfs/  Woutput/  hey)

But , it gives me following error while when I try to run through eclipse...
I use run dialog box of eclipse and specify Main class 
(org.apache.hadoop.examples.Grep) and program arguments correctly(Wdfs/  
Woutput/  hey).
Please help....


2008-03-13 11:24:59,639 INFO  jvm.JvmMetrics (JvmMetrics.java:init(67)) 
- Initializing JVM Metrics with processName=JobTracker, sessionId=
2008-03-13 11:24:59,782 INFO  mapred.FileInputFormat 
(FileInputFormat.java:validateInput(153)) - Total input paths to process : 1
2008-03-13 11:24:59,978 WARN  conf.Configuration 
(Configuration.java:loadResource(907)) - 
build/test/mapred/local/localRunner/job_local_1.xml:a attempt to 
override final parameter: hadoop.tmp.dir;  Ignoring.
2008-03-13 11:24:59,982 INFO  mapred.JobClient 
(JobClient.java:runJob(811)) - Running job: job_local_1
2008-03-13 11:25:00,985 INFO  mapred.JobClient 
(JobClient.java:runJob(834)) -  map 0% reduce 0%
2008-03-13 11:25:11,587 INFO  mapred.MapTask (MapTask.java:run(174)) - 
numReduceTasks: 1
2008-03-13 11:25:17,793 WARN  mapred.LocalJobRunner 
(LocalJobRunner.java:run(223)) - job_local_1
java.lang.NullPointerException
    at 
org.apache.hadoop.io.serializer.SerializationFactory.<init>(SerializationFactory.java:52)
    at 
org.apache.hadoop.mapred.MapTask$MapOutputBuffer.<init>(MapTask.java:325)
    at org.apache.hadoop.mapred.MapTask.run(MapTask.java:177)
    at 
org.apache.hadoop.mapred.LocalJobRunner$Job.run(LocalJobRunner.java:150)
Exception in thread "main" java.io.IOException: Job failed!
    at org.apache.hadoop.mapred.JobClient.runJob(JobClient.java:900)
    at org.apache.hadoop.examples.Grep.run(Grep.java:71)
    at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65)
    at org.apache.hadoop.examples.Grep.main(Grep.java:97)

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