Hi, I;m new to hadoop and i downloaded hadoop-0.12.3 from apahce website and installed it to a server with RedHat EL4. I followed the instruction from wiki page: 1. formatted the namenod,. 2. use hadoop dfs -put to put a txt file to dfs(It's the LICENSE.txt in hadoop root directory). 3. use hadoop dfs -ls , and the file is listed correctly. 4. try ./hadoop jar ../hadoop-0.12.3-examples.jar grep /user/hadoop/ /user/hadoop/out apache, everything works fine and i got the result.
Next i tried to Starting up a larger cluster, set the ssh and scp a copy to another server, formatted the namenode again, started hadoop using start-all.sh. Then i tried the example again, but it seems will not finish and just hanging there: [EMAIL PROTECTED] bin]$ ./start-all.sh starting namenode, logging to /home/hadoop/hadoop-0.12.3/bin/../logs/hadoop- hadoop-namenode-linux5.out localhost: starting datanode, logging to /home/hadoop/hadoop-0.12.3 /bin/../logs/hadoop-hadoop-datanode-linux5.out 172.16.201.6: starting datanode, logging to /home/hadoop/hadoop-0.12.3 /bin/../logs/hadoop-hadoop-datanode-linux6.out localhost: starting secondarynamenode, logging to /home/hadoop/hadoop-0.12.3 /bin/../logs/hadoop-hadoop-secondarynamenode-linux5.out starting jobtracker, logging to /home/hadoop/hadoop-0.12.3 /bin/../logs/hadoop-hadoop-jobtracker-linux5.out 172.16.201.6: starting tasktracker, logging to /home/hadoop/hadoop-0.12.3 /bin/../logs/hadoop-hadoop-tasktracker-linux6.out localhost: starting tasktracker, logging to /home/hadoop/hadoop-0.12.3 /bin/../logs/hadoop-hadoop-tasktracker-linux5.out [EMAIL PROTECTED] bin]$ ./hadoop jar ../hadoop-0.12.3-examples.jar grep /user/hadoop/ /user/hadoop/out apache 07/05/11 18:34:49 INFO mapred.InputFormatBase: Total input paths to process : 1 07/05/11 18:34:49 INFO mapred.JobClient: Running job: job_0002 07/05/11 18:34:50 INFO mapred.JobClient: map 0% reduce 0% 07/05/11 18:34:56 INFO mapred.JobClient: map 50% reduce 0% 07/05/11 18:34:57 INFO mapred.JobClient: map 100% reduce 0% 07/05/11 18:35:05 INFO mapred.JobClient: map 100% reduce 8% 07/05/11 18:35:06 INFO mapred.JobClient: map 100% reduce 16% the reduce task just processed to 16%. So i waited about an hour the job is still here, could some one help me find out what i did wrong? Thanks, Yiqing
