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From David Scarlatti <d_scarla...@yahoo.es>
Subject Building Mahout
Date Thu, 13 Sep 2012 10:29:03 GMT
Hi, I'm installing Mahout, following this steps (
http://cloudblog.8kmiles.com/2012/01/31/apache-mahout-installation-on-hadoop-cluster/
):

user1@ubuntu-server:~$ apt-get install maven2

 user1@ubuntu-server:~$ cd /opt

 user1@ubuntu-server:~$ svn co http://svn.apache.org/repos/asf/mahout/trunk

 user1@ubuntu-server:~$ mv trunk mahout_trunk

 user1@ubuntu-server:~$ ln -s mahout_trunk/ mahout

 user1@ubuntu-server:~$ cd mahout

 user1@ubuntu-server:~$ mvn install


I get this result:

Results :

Failed tests:
testCanopyEuclideanMRJobNoClustering(org.apache.mahout.clustering.meanshift.TestMeanShift):
count expected:<3> but was:<4>

Tests run: 676, Failures: 1, Errors: 0, Skipped: 0

[INFO]
------------------------------------------------------------------------
[ERROR] BUILD FAILURE
[INFO]
------------------------------------------------------------------------
[INFO] There are test failures.

Please refer to /opt/mahout_trunk/core/target/surefire-reports for the
individual test results.
[INFO]
------------------------------------------------------------------------
[INFO] For more information, run Maven with the -e switch
[INFO]
------------------------------------------------------------------------
[INFO] Total time: 51 minutes 43 seconds
[INFO] Finished at: Thu Sep 13 12:27:34 CEST 2012
[INFO] Final Memory: 50M/399M
[INFO]
------------------------------------------------------------------------





It seems it is know (same web page says: P.S.: Sometimes some tests fail
while building mahout from source. In such cases use – user1@ubuntu-server:~$
mvn -DskipTests install)

I'd like  to understand what exactly the test run are... are they optional?

An installation with -DskipTests is the same than the "clean" one?

Are any documentation available explaining the installation a bit...?

Thanks in advance.

-- 
-----
David.

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