Hi Tim, Sorry that you couldn't get the installation going, let us know how the next attempt goes. Thanks, Ted. ...
Sorry that you couldn't get the installation going, let us know how the next attempt goes.
First, some context. While attempting an installation of a Hadoop cluster using Ambari, I struggled with getting SSH to stop blocking the communication of the cluster. Even though I got that sorted, I figured I had so irreparably screwed up the installation that I wanted to start over and I used this advice to reset the cluster: http://hortonworks.com/community/forums/topic/delete-cluster/
Now, I got a nearly flawless installation except the NameNode service refused to start. Attempting to start the NameNode through Ambari, I get the following error:
err: /Stage/Hdp-hadoop::Namenode/Hdp-hadoop::Namenode::Create_app_directories[create_app_directories]/Hdp-hadoop::Hdfs::Directory[/mapred]/Hdp-hadoop::Exec-hadoop[fs -mkdir /mapred]/Hdp::Exec[hadoop --config /etc/hadoop/conf fs -mkdir /mapred]/Exec[hadoop --config /etc/hadoop/conf fs -mkdir /mapred]/returns: change from notrun to 0 failed: hadoop --config /etc/hadoop/conf fs -mkdir /mapred returned 255 instead of one of  at /var/lib/ambari-agent/puppet/modules/hdp/manifests/init.pp:340