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From "Alexandre de Assis Bento Lima" <as...@cos.ufrj.br>
Subject Hadoop on Eclipse
Date Tue, 04 Oct 2011 05:08:05 GMT
Hi,

I'm following the steps suggested by the wiki page:

EclipseEnvironment - Hadoop Wiki (http://wiki.apache.org/hadoop/EclipseEnvironment)

in order to have an Eclipse project for Hadoop. I'm exactly trying to execute the
following command:

mvn eclipse:eclipse -DdownloadSources=true -DdownloadJavadocs=true

But I always get the following error:

[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 12.657s
[INFO] Finished at: Tue Oct 04 02:04:11 BRT 2011
[INFO] Final Memory: 31M/282M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal on project hadoop-yarn-common: Could not resolve
dependencies for project org.apache.hadoop:hadoop-yarn-common:jar:0.24.0-SNAPSHOT:
Failed to collect dependencies for [log4j:log4j:jar:1.2.12 (compile),
org.apache.hadoop:hadoop-yarn-api:jar:0.24.0-SNAPSHOT (compile),
org.apache.avro:avro:jar:1.5.3 (compile), com.google.protobuf:protobuf-java:jar:2.4.0a
(compile), org.apache.hadoop:hadoop-common:jar:0.24.0-SNAPSHOT (compile),
org.apache.hadoop:hadoop-annotations:jar:0.24.0-SNAPSHOT (compile),
junit:junit:jar:4.8.2 (compile), org.mockito:mockito-all:jar:1.8.5 (test),
org.apache.hadoop:hadoop-common:jar:tests:0.24.0-SNAPSHOT (test),
org.apache.hadoop:hadoop-hdfs:jar:0.24.0-SNAPSHOT (runtime),
com.google.inject.extensions:guice-servlet:jar:2.0 (compile),
org.jboss.netty:netty:jar:3.2.3.Final (compile), org.slf4j:slf4j-api:jar:1.6.1
(compile), org.slf4j:slf4j-log4j12:jar:1.6.1 (compile)]: Failed to read artifact
descriptor for org.apache.hadoop:hadoop-yarn-api:jar:0.24.0-SNAPSHOT: Failure to find
org.apache.hadoop:hadoop-yarn:pom:${yarn.version} in
http://repository.jboss.org/nexus/content/groups/public/ was cached in the local
repository, resolution will not be reattempted until the update interval of
repository.jboss.org has elapsed or updates are forced -> [Help 1]

Then, I try 

mvn -X eclipse:eclipse -DdownloadSources=true -DdownloadJavadocs=true

and get

[DEBUG] =======================================================================
[INFO] 
[INFO] >>> maven-eclipse-plugin:2.8:eclipse (default-cli) @ hadoop-yarn-common >>>
[DEBUG] Could not find metadata
org.apache.hadoop:hadoop-yarn-api:0.24.0-SNAPSHOT/maven-metadata.xml in local
(/home/assis/.m2/repository)
[DEBUG] Using connector WagonRepositoryConnector with priority 0 for
http://repository.apache.org/snapshots
Downloading:
http://repository.apache.org/snapshots/org/apache/hadoop/hadoop-yarn-api/0.24.0-SNAPSHOT/maven-metadata.xml
Downloaded:
http://repository.apache.org/snapshots/org/apache/hadoop/hadoop-yarn-api/0.24.0-SNAPSHOT/maven-metadata.xml
(785 B at 1.0 KB/sec)
[DEBUG] Reading resolution tracking file
/home/assis/.m2/repository/org/apache/hadoop/hadoop-yarn-api/0.24.0-SNAPSHOT/resolver-status.properties
[DEBUG] Writing resolution tracking file
/home/assis/.m2/repository/org/apache/hadoop/hadoop-yarn-api/0.24.0-SNAPSHOT/resolver-status.properties
[INFO] ------------------------------------------------------------------------
[INFO] Reactor Summary:
[INFO] 
[INFO] Apache Hadoop Project POM ......................... SUCCESS [1.626s]
[INFO] Apache Hadoop Annotations ......................... SUCCESS [0.289s]
[INFO] Apache Hadoop Project Dist POM .................... SUCCESS [0.255s]
[INFO] Apache Hadoop Assemblies .......................... SUCCESS [0.207s]
[INFO] Apache Hadoop Auth ................................ SUCCESS [0.557s]
[INFO] Apache Hadoop Auth Examples ....................... SUCCESS [0.384s]
[INFO] Apache Hadoop Common .............................. SUCCESS [1.912s]
[INFO] Apache Hadoop Common Project ...................... SUCCESS [0.083s]
[INFO] Apache Hadoop HDFS ................................ SUCCESS [3.209s]
[INFO] Apache Hadoop HDFS Project ........................ SUCCESS [0.160s]
[INFO] hadoop-yarn-api ................................... SUCCESS [2.273s]
[INFO] hadoop-yarn-common ................................ FAILURE [0.926s]

I check the local repository and realize that there's no maven-metadata.xml file there.
So, I download it myself, try again, and the same things happen.
Can anyone help me, please? I'm using Ubuntu 11.04 with jdk1.7.0, maven 3.0.3 and
protobuf 2.4.1.

Thanks in advance!

Alexandre A. B. Lima.
-----------------------------------------------
COPPE / Computer Science
Federal University of Rio de Janeiro
Rio de Janeiro, Brazil.
+55-21-2562-8690


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