I've installed Hadoop 1.0.0 on Ubuntu. I am running Ubuntu 10.04 in Virtual Box. I am running single node (all on my virtual box).
I can't get the examples to run. Once it hits the map reduce stage it just hangs. HDFS seems fine (the jobs create directories/files OK I think). See output below (console and web output on port 50030). I can even navigate to the job but it doesn't run! I am new to Hadoop/Mapreduce and just want to get the examples running before I start diving in. It took me a while to get the configuration working to this point but now I am really stuck. I assume this is a resource issue (because of running on VirtualBox I don't have scads of disk or memory). I also read that there were issues with ubuntu with having IPV6turned on but don't want to make changes there unless I can verify that is the issue. Sorry if this is a newbie question but I would love to dig into Hadoop and my laptop with Virtual box is the most convenient place to do it. Hope I can get some help here! THanks in advance! Bob Console output: hdfs@bob-laptop:~$ hadoop jar /usr/share/hadoop/hadoop-examples-1.0.1.jar pi 10 100 Number of Maps = 10 Samples per Map = 100 Wrote input for Map #0 Wrote input for Map #1 Wrote input for Map #2 Wrote input for Map #3 Wrote input for Map #4 Wrote input for Map #5 Wrote input for Map #6 Wrote input for Map #7 Wrote input for Map #8 Wrote input for Map #9 Starting Job 12/03/16 11:12:12 INFO mapred.FileInputFormat: Total input paths to process : 10 12/03/16 11:12:19 INFO mapred.JobClient: Running job: job_201203161018_0001 12/03/16 11:12:20 INFO mapred.JobClient: map 0% reduce 0% Here is what the web interface on port 50030 tells me: Hadoop Job Queue Scheduling Information on localhost State : running Scheduling Information : Queue configuration Capacity Percentage: 100.0% User Limit: 100% Priority Supported: NO ------------- Map tasks Capacity: 0 slots Used capacity: 0 (0.0% of Capacity) Running tasks: 0 ------------- Reduce tasks Capacity: 0 slots Used capacity: 0 (0.0% of Capacity) Running tasks: 0 ------------- Job info Number of Waiting Jobs: 0 Number of Initializing Jobs: 1 Number of users who have submitted jobs: 1 -- View this message in context: http://old.nabble.com/Hadoop-1.0.0---stuck-at-map-reduce-tp33519086p33519086.html Sent from the Hadoop core-user mailing list archive at Nabble.com.
