The Hadoop version isn't the issue as it's a ClassNotFoundException for a Mahout dependency for sure.
Hmm I do think maybe the pom change is relevant. The original error concerns some plugin, org.eclipse.m2e, but that is not present in the project poms. are you sure you have the latest files from SVN, no possiblity of other files, no other modifications? This plugin does indeed not exist, but I don't see any use of it when I build. That seems to be the source of the issue. On Wed, Jan 18, 2012 at 1:55 PM, Martin Wignall < martin.wign...@autotrader.co.uk> wrote: > Thanks for your response Sean. Only other thing I can think of is I had to > amend my pom.xml - I removed > > <plugin> > <groupId>org.eclipse.m2e</groupId> > <artifactId>lifecycle-mapping</artifactId> > <version>1.0.0</version> > <configuration> > <lifecycleMappingMetadata> > <pluginExecutions> > <pluginExecution> > <pluginExecutionFilter> > <groupId>org.apache.maven.plugins</groupId> > <artifactId>maven-dependency-plugin</artifactId> > <versionRange>[2.0,)</versionRange> > <goals> > <goal>copy-dependencies</goal> > </goals> > </pluginExecutionFilter> > <action> > <ignore /> > </action> > </pluginExecution> > </pluginExecutions> > </lifecycleMappingMetadata> > </configuration> > </plugin> > > from <plugins>, because > > mvn clean package > > did not work from the command line. I got the following error: > > mvn clean package > [INFO] Scanning for projects... > [INFO] > ------------------------------------------------------------------------ > [INFO] Building Mahout Core > [INFO] task-segment: [clean, package] > [INFO] > ------------------------------------------------------------------------ > Downloading: > http://repo1.maven.org/maven2/org/eclipse/m2e/lifecycle-mapping/1.0.0/lifecycle-mapping-1.0.0.pom > [INFO] Unable to find resource > 'org.eclipse.m2e:lifecycle-mapping:pom:1.0.0' in repository central ( > http://repo1.maven.org/maven2) > Downloading: > http://repo1.maven.org/maven2/org/eclipse/m2e/lifecycle-mapping/1.0.0/lifecycle-mapping-1.0.0.pom > [INFO] Unable to find resource > 'org.eclipse.m2e:lifecycle-mapping:pom:1.0.0' in repository central ( > http://repo1.maven.org/maven2) > [INFO] > ------------------------------------------------------------------------ > [ERROR] BUILD ERROR > [INFO] > ------------------------------------------------------------------------ > [INFO] Error building POM (may not be this project's POM). > > > Project ID: org.eclipse.m2e:lifecycle-mapping > > Reason: POM 'org.eclipse.m2e:lifecycle-mapping' not found in repository: > Unable to download the artifact from any repository > > org.eclipse.m2e:lifecycle-mapping:pom:1.0.0 > > from the specified remote repositories: > apache.snapshots (http://repository.apache.org/snapshots), > central (http://repo1.maven.org/maven2) > > for project org.eclipse.m2e:lifecycle-mapping > > > The above change to my pom.xml fixed the problem and allowed me to > package. I don’t imagine that this is related. Do you? (Just trying to rule > it out) > > > > In answer to your questions, I’m on maven version 2.2.1, and Ubuntu 11.10 > > mvn --version > Apache Maven 2.2.1 (rdebian-6) > Java version: 1.6.0_23 > Java home: /usr/lib/jvm/java-6-openjdk/jre > Default locale: en_GB, platform encoding: UTF-8 > OS name: "linux" version: "3.0.0-14-generic-pae" arch: "i386" Family: > "unix" > > > And in terms of my mahout structure, I just downloaded trunk: > > martin@ubuntu:~/mahout/trunk$ ll > total 168 > drwxrwxr-x 14 martin martin 4096 2012-01-09 16:53 ./ > drwxrwxr-x 3 martin martin 4096 2012-01-06 16:10 ../ > drwxrwxr-x 3 martin martin 4096 2012-01-06 16:11 bin/ > drwxrwxr-x 6 martin martin 4096 2012-01-09 15:54 buildtools/ > -rw-rw-r-- 1 martin martin 14653 2012-01-09 17:48 .classpath > drwxrwxr-x 8 martin martin 4096 2012-01-18 12:24 core/ > drwxrwxr-x 5 martin martin 4096 2012-01-09 15:54 distribution/ > -rw-rw-r-- 1 martin martin 2320 2012-01-06 16:11 doap_Mahout.rdf > drwxrwxr-x 7 martin martin 4096 2012-01-09 15:54 examples/ > -rw-rw-r-- 1 martin martin 345 2012-01-06 16:11 .gitignore > drwxrwxr-x 8 martin martin 4096 2012-01-09 15:54 integration/ > -rw-rw-r-- 1 martin martin 39588 2012-01-06 16:10 LICENSE.txt > drwxrwxr-x 7 martin martin 4096 2012-01-09 16:01 math/ > drwxrwxr-x 5 martin martin 4096 2012-01-10 11:22 mw-play/ > -rw-rw-r-- 1 martin martin 1888 2012-01-06 16:10 NOTICE.txt > -rw-rw-r-- 1 martin martin 32289 2012-01-06 16:11 pom.xml > -rw-rw-r-- 1 martin martin 535 2012-01-09 16:41 .project > -rw-rw-r-- 1 martin martin 1655 2012-01-09 16:00 .project~ > -rw-rw-r-- 1 martin martin 1200 2012-01-06 16:11 README.txt > drwxrwxr-x 2 martin martin 4096 2012-01-09 15:58 .settings/ > drwxrwxr-x 5 martin martin 4096 2012-01-06 16:10 src/ > drwxrwxr-x 6 martin martin 4096 2012-01-06 16:10 .svn/ > drwxrwxr-x 3 martin martin 4096 2012-01-06 16:10 target/ > > > > Only other thing I can think of is I have hadoop version > hadoop-0.20.205.0. (I say that because the error I see is when running > hadoop after all… > > hadoop jar target/mahout-core-0.6-SNAPSHOT.jar > org.apache.mahout.cf.taste.hadoop.item.RecommenderJob > -Dmapred.input.dir=input/input.txt > -Dmapred.output.dir=output --usersFile input/users.txt --booleanData > > gives > > Exception in thread "main" java.lang.NoClassDefFoundError: > org/apache/commons/cli2/Option > at java.lang.Class.forName0(Native Method) > at java.lang.Class.forName(Class.java:264) > at org.apache.hadoop.util.RunJar.main(RunJar.java:149) > Caused by: java.lang.ClassNotFoundException: org.apache.commons.cli2.Option > 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 java.lang.ClassLoader.loadClass(ClassLoader.java:266) > ... 3 more > ) > > > Anything in my above setup look incorrect? > > Thanks, > > Martin Wignall > Application Architect > Trader Media Digital > Redwood House > Woodlands Business Park > Newton-le-Willows > WA12 0HE > 01925 296 245 > 07525 405 281 > martin.wign...@autotrader.co.uk > > > -----Original Message----- > From: Sean Owen [mailto:sro...@gmail.com] > Sent: 18 January 2012 13:04 > To: user@mahout.apache.org > Subject: Re: error running a RecommenderJob > > The exact same comment generates the job file for me... I see a lot more > output though, as it does the work of packaging the job file. > > I wonder if it's a Maven version thing (I use 3.0.3 on OS X 10.7) or, do > you have all the other files in the project, above core/? I'd expect it to > just outright fail if either of those were at issue though. > > Run package from the project root? wild guess. That shouldn't be needed. > > On Wed, Jan 18, 2012 at 12:51 PM, Martin Wignall < > martin.wign...@autotrader.co.uk<mailto:martin.wign...@autotrader.co.uk>> > wrote: > > > Thanks Sean. Any idea why: > > > > mvn -DskipTests clean package > > > > (or > > mvn -DskipTests package > > ) > > > > might not have created the .job file? Is there something else I need to > do? > > > > > > > ________________________________________ > > > This e-mail is sent on behalf of Trader Media Group Limited, Registered > Office: Auto Trader House, Cutbush Park Industrial Estate, Danehill, Lower > Earley, Reading, Berkshire, RG6 4UT(Registered in England No. 4768833). > This email and any files transmitted with it are confidential and may be > legally privileged, and intended solely for the use of the individual or > entity to whom they are addressed. If you have received this email in error > please notify the sender. This email message has been swept for the > presence of computer viruses. > >
