I also have gotten the Mahout in Action book recently and am stuck on
the first example. I downloaded the 0.6 distribution and downloaded and
built the MiA code. When I attempt to run the class from the command
line, I get this error:
java mia.recommender.ch02.RecommenderIntro
Exception in thread "main" java.lang.NoClassDefFoundError:
org/apache/mahout/cf/taste/model/DataModel
Caused by: java.lang.ClassNotFoundException:
org.apache.mahout.cf.taste.model.DataModel
at java.net.URLClassLoader$1.run(URLClassLoader.java:217)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
at java.lang.ClassLoader.loadClass(ClassLoader.java:321)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:294)
at java.lang.ClassLoader.loadClass(ClassLoader.java:266)
Could not find the main class: mia.recommender.ch02.RecommenderIntro.
Program will exit.
Am I missing a jar somewhere, or am I running with the wrong Mahout version?
When I change into the MiA directed and attempt to run it with Maven, I
get this error:
mvn pom.xml
[INFO] Scanning for projects...
[INFO]
[INFO]
------------------------------------------------------------------------
[INFO] Building Mahout in Action Examples 0.1
[INFO]
------------------------------------------------------------------------
[INFO]
------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO]
------------------------------------------------------------------------
[INFO] Total time: 0.642s
[INFO] Finished at: Sun Jun 17 06:22:08 EDT 2012
[INFO] Final Memory: 2M/15M
[INFO]
------------------------------------------------------------------------
[ERROR] Unknown lifecycle phase "pom.xml". You must specify a valid
lifecycle phase or a goal in the format <plugin-prefix>:<goal> or
<plugin-group-id>:<plugin-artifact-id>[:<plugin-version>]:<goal>.
Available lifecycle phases are: validate, initialize, generate-sources,
process-sources, generate-resources, process-resources, compile,
process-classes, generate-test-sources, process-test-sources,
generate-test-resources, process-test-resources, test-compile,
process-test-classes, test, prepare-package, package,
pre-integration-test, integration-test, post-integration-test, verify,
install, deploy, pre-clean, clean, post-clean, pre-site, site,
post-site, site-deploy. -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the
-e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions,
please read the following articles:
[ERROR] [Help 1]
http://cwiki.apache.org/confluence/display/MAVEN/LifecyclePhaseNotFoundException
I am new to Maven to it may be that I don't know how to run Maven
correctly. Also, when I downloaded the trunk version from svn I was
not able to get it to build (it seemed to be missing a few jar files
but I forget which ones), but that's a different issue. Right now I am
trying to figure out how to run the first examples in some version of
Mahout. If anybody knows how to run the examples I would greatly
appreciate the assistance.
thanks,
Paul
On 06/13/2012 12:20 PM, Sean Owen wrote:
(Since you also asked in the publisher's forum, and it pertains to the
book, I will answer there rather than on the general Mahout mailing list.)
On Wed, Jun 13, 2012 at 2:25 PM, Yaprak Ayazoglu
<[email protected]>wrote:
Hi,
I'm following "Mahout in Action" book to learn Mahout. I'm trying to run
the example codes in this book. I downloaded the codes and run
"RecommenderIntro.java" (a code at chapter 2 - ch2).
After running this code I get the following error:
Exception in thread "main" java.io.FileNotFoundException: intro.csv
at
org.apache.mahout.cf.taste.impl.model.file.FileDataModel.<init>(FileDataModel.java:160)
at
org.apache.mahout.cf.taste.impl.model.file.FileDataModel.<init>(FileDataModel.java:146)
at mia.recommender.ch02.RecommenderIntro.main(RecommenderIntro.java:26)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:120)
Can you help me to solve this problem?
Thanks.
--
Yaprak
