Hi Sujit, Please also tell us which version/distribution of Hadoop is this?
On Tue, Mar 6, 2012 at 11:27 PM, Sujit Dhamale <[email protected]> wrote: > Hi, > > I am new to Hadoop., i install Hadoop as per > http://www.michael-noll.com/tutorials/running-hadoop-on-ubuntu-linux-single-node-cluster/<http://www.michael-noll.com/tutorials/running-hadoop-on-ubuntu-linux-single-node-cluste> > > > while running Word cont example i am getting *NullPointerException > > *can some one please look in to this issue ?* > > *Thanks in Advance* !!! > > * > > > duser@sujit:~/Desktop/hadoop$ bin/hadoop dfs -ls /user/hduser/data > Found 3 items > -rw-r--r-- 1 hduser supergroup 674566 2012-03-06 23:04 > /user/hduser/data/pg20417.txt > -rw-r--r-- 1 hduser supergroup 1573150 2012-03-06 23:04 > /user/hduser/data/pg4300.txt > -rw-r--r-- 1 hduser supergroup 1423801 2012-03-06 23:04 > /user/hduser/data/pg5000.txt > > hduser@sujit:~/Desktop/hadoop$ bin/hadoop jar hadoop*examples*.jar > wordcount /user/hduser/data /user/hduser/gutenberg-outputd > > 12/03/06 23:14:33 INFO input.FileInputFormat: Total input paths to process > : 3 > 12/03/06 23:14:33 INFO mapred.JobClient: Running job: job_201203062221_0002 > 12/03/06 23:14:34 INFO mapred.JobClient: map 0% reduce 0% > 12/03/06 23:14:49 INFO mapred.JobClient: map 66% reduce 0% > 12/03/06 23:14:55 INFO mapred.JobClient: map 100% reduce 0% > 12/03/06 23:14:58 INFO mapred.JobClient: Task Id : > attempt_201203062221_0002_r_000000_0, Status : FAILED > Error: java.lang.NullPointerException > at > java.util.concurrent.ConcurrentHashMap.get(ConcurrentHashMap.java:768) > at > org.apache.hadoop.mapred.ReduceTask$ReduceCopier$GetMapEventsThread.getMapCompletionEvents(ReduceTask.java:2900) > at > org.apache.hadoop.mapred.ReduceTask$ReduceCopier$GetMapEventsThread.run(ReduceTask.java:2820) > > 12/03/06 23:15:07 INFO mapred.JobClient: Task Id : > attempt_201203062221_0002_r_000000_1, Status : FAILED > Error: java.lang.NullPointerException > at > java.util.concurrent.ConcurrentHashMap.get(ConcurrentHashMap.java:768) > at > org.apache.hadoop.mapred.ReduceTask$ReduceCopier$GetMapEventsThread.getMapCompletionEvents(ReduceTask.java:2900) > at > org.apache.hadoop.mapred.ReduceTask$ReduceCopier$GetMapEventsThread.run(ReduceTask.java:2820) > > 12/03/06 23:15:16 INFO mapred.JobClient: Task Id : > attempt_201203062221_0002_r_000000_2, Status : FAILED > Error: java.lang.NullPointerException > at > java.util.concurrent.ConcurrentHashMap.get(ConcurrentHashMap.java:768) > at > org.apache.hadoop.mapred.ReduceTask$ReduceCopier$GetMapEventsThread.getMapCompletionEvents(ReduceTask.java:2900) > at > org.apache.hadoop.mapred.ReduceTask$ReduceCopier$GetMapEventsThread.run(ReduceTask.java:2820) > > 12/03/06 23:15:31 INFO mapred.JobClient: Job complete: job_201203062221_0002 > 12/03/06 23:15:31 INFO mapred.JobClient: Counters: 20 > 12/03/06 23:15:31 INFO mapred.JobClient: Job Counters > 12/03/06 23:15:31 INFO mapred.JobClient: Launched reduce tasks=4 > 12/03/06 23:15:31 INFO mapred.JobClient: SLOTS_MILLIS_MAPS=22084 > 12/03/06 23:15:31 INFO mapred.JobClient: Total time spent by all > reduces waiting after reserving slots (ms)=0 > 12/03/06 23:15:31 INFO mapred.JobClient: Total time spent by all maps > waiting after reserving slots (ms)=0 > 12/03/06 23:15:31 INFO mapred.JobClient: Launched map tasks=3 > 12/03/06 23:15:31 INFO mapred.JobClient: Data-local map tasks=3 > 12/03/06 23:15:31 INFO mapred.JobClient: Failed reduce tasks=1 > 12/03/06 23:15:31 INFO mapred.JobClient: SLOTS_MILLIS_REDUCES=16799 > 12/03/06 23:15:31 INFO mapred.JobClient: FileSystemCounters > 12/03/06 23:15:31 INFO mapred.JobClient: FILE_BYTES_READ=740520 > 12/03/06 23:15:31 INFO mapred.JobClient: HDFS_BYTES_READ=3671863 > 12/03/06 23:15:31 INFO mapred.JobClient: FILE_BYTES_WRITTEN=2278287 > 12/03/06 23:15:31 INFO mapred.JobClient: File Input Format Counters > 12/03/06 23:15:31 INFO mapred.JobClient: Bytes Read=3671517 > 12/03/06 23:15:31 INFO mapred.JobClient: Map-Reduce Framework > 12/03/06 23:15:31 INFO mapred.JobClient: Map output materialized > bytes=1474341 > 12/03/06 23:15:31 INFO mapred.JobClient: Combine output records=102322 > 12/03/06 23:15:31 INFO mapred.JobClient: Map input records=77932 > 12/03/06 23:15:31 INFO mapred.JobClient: Spilled Records=153640 > 12/03/06 23:15:31 INFO mapred.JobClient: Map output bytes=6076095 > 12/03/06 23:15:31 INFO mapred.JobClient: Combine input records=629172 > 12/03/06 23:15:31 INFO mapred.JobClient: Map output records=629172 > 12/03/06 23:15:31 INFO mapred.JobClient: SPLIT_RAW_BYTES=346 > hduser@sujit:~/Desktop/hadoop$ -- Harsh J
