Hi Alessio, In fact, this is the specific error that I am getting
Command mvn -Phadoop_yarn -Dhadoop.version=2.6.0 -DskipTests package [INFO] Scanning for projects... Downloading: http://repo1.maven.org/maven2/org/apache/apache/13/apache-13.pom 4/14 KB ^M8/14 KB ^M12/14 KB ^M14/14 KB ^M ^MDownloaded: http://repo1.maven.org/maven2/org/apache/apache/13/apache-13.pom (14 KB at 55.2 KB/sec) [ERROR] [ERROR] Some problems were encountered while processing the POMs: [ERROR] 'dependencies.dependency.version' for org.apache.hadoop:hadoop-common:jar is missing. @ line 1277, column 21 [ERROR] 'dependencies.dependency.version' for org.apache.hadoop:hadoop-mapreduce-client-common:jar is missing. @ line 1281, column 21 [ERROR] 'dependencies.dependency.version' for org.apache.hadoop:hadoop-mapreduce-client-core:jar is missing. @ line 1285, column 21 @ [ERROR] The build could not read 1 project -> [Help 1] [ERROR] [ERROR] The project org.apache.giraph:giraph-parent:1.2.0 (/home/saiganes/giraph-1.2.0/
