I am very new to this field. I am installing hortonworks 2.6 on centos6. Everything is going fine but namenode is not starting. I am attaching picture of namenode errors. Please help
Are all the other services up?
If it's not an HA setup can you run the following command on the NameNode host machine
su -l hdfs -c "/usr/hdp/current/hadoop-hdfs-namenode/../hadoop/sbin/hadoop-daemon.sh start namenode"