How to Install Hadoop on Mac OS X El Capitan. This tutorial contains step by step instructions for installing hadoop 2.x on Mac OS X El Capitan. These instructions should work on other Mac OS X versions such as Yosemite and Sierra. Download hadoop 2.7.3 binary zip file from this link (200MB). Extract the contents of the zip to a folder of. How to setup Hadoop on Mac OS X 10.9 Mavericks. Hadoop is an open-source Apache project that enables processing of extremely large datasets in a distributed. Thank you for the writeup. Very helpful! > hadoop nodename -format Exception in thread “main” java.lang.NoClassDefFoundError: nodename Caused by: java.lang.ClassNotFoundException: nodename at java.net.URLClassLoader$1.run(URLClassLoader.java:202) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:190) at java.lang.ClassLoader.loadClass(ClassLoader.java:306) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301) at java.lang.ClassLoader.loadClass(ClassLoader.java:247) Perhaps you meant: > hadoop namenode -format. New error occuring now Number of Maps = 10 Samples per Map = 100 12/07/18 21:10:38 INFO ipc.Client: Retrying connect to server: localhost/127.0.0.1:8020. Bluetooth driver for mac. Already tried 0 time(s). 12/07/18 21:10:39 INFO ipc.Client: Retrying connect to server: localhost/127.0.0.1:8020. Already tried 1 time(s). 12/07/18 21:10:40 INFO ipc.Client: Retrying connect to server: localhost/127.0.0.1:8020. Already tried 2 time(s). 12/07/18 21:10:41 INFO ipc.Client: Retrying connect to server: localhost/127.0.0.1:8020. Already tried 3 time(s). 12/07/18 21:10:42 INFO ipc.Client: Retrying connect to server: localhost/127.0.0.1:8020. Already tried 4 time(s). 12/07/18 21:10:43 INFO ipc.Client: Retrying connect to server: localhost/127.0.0.1:8020. Already tried 5 time(s). 12/07/18 21:10:44 INFO ipc.Client: Retrying connect to server: localhost/127.0.0.1:8020. Already tried 6 time(s). 12/07/18 21:10:45 INFO ipc.Client: Retrying connect to server: localhost/127.0.0.1:8020. Already tried 7 time(s). 12/07/18 21:10:46 INFO ipc.Client: Retrying connect to server: localhost/127.0.0.1:8020. Already tried 8 time(s). 12/07/18 21:10:47 INFO ipc.Client: Retrying connect to server: localhost/127.0.0.1:8020. Already tried 9 time(s). I am using Mac OS 10.8. Could you tell me what is going wrong. When trying out the tutorial the map seems to work, but it cannot compute the reduce. Hello again Ritesh Agrawal! I would like to know who hadoop work with the other exemple in hadoop-exemple.jar. There is several example to be use as a test. I found the WordCount test but i would like to know how to execute it with the right syntax: First I need a.txt with some letter in double triple etc. Is there any command to let hadoop knows or do I just need to do something like this: hadoop jar /usr/local/~/hadoop-example-1.1.0.jar worldcount? 10 100 /usr/~/toto.txt Is there any documentation where I can find some help with the example? Thanks for your help, Kevin. Thanks very useful but I am trying to install hadoop 1.1.2 but I am getting the following error. The following two commands seem to work ok: ~ $ hadoop namenode -format ~ $ /usr/local/Cellar/hadoop/1.1.2/bin/start-all.sh As you can see other commands seem to work ok ~ $ ps ax| grep hadoop| wc -l 5 However the example fails miserably ideas? ~ $ hadoop jar /usr/local/Cellar/hadoop/1.1.2/libexec/hadoop-examples-1.1.2.jar pi 10 100 Number of Maps = 10 Samples per Map = 100 2013-05-27 15:05:30.221 java[] Unable to load realm info from SCDynamicStore 13/05/27 15:05:30 WARN hdfs.DFSClient: DataStreamer Exception: org.apache.hadoop.ipc.RemoteException: java.io.IOException: File /user/sergep/PiEstimator_TMP_3_141592654/in/part0 could only be replicated to 0 nodes, instead of 1 at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getAdditionalBlock(FSNamesystem.java:1639). I am running 1.1.2 and undid the step 2.* and I got the “Unable to load realm info from SCDynamicStore” error while executing hadoop namenode -format. But the command formatted. “/usr/local/Cellar/hadoop/1.1.2/bin/start-all.sh” starts hadoop, and “hadoop jar /usr/local/Cellar/hadoop/1.1.2/libexec/hadoop-examples-1.1.2.jar pi 10 10” throws the “Unable to load realm info from SCDynamicStore” error, but completes. However I think the results are incorrect. The last 2 lines of the output are: Job Finished in 2.517 seconds Estimated value of Pi is 3. The pi value seems way off.
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