Best practices for deploying the Hadoop plug-in
Consider the following when you deploy Hadoop plug-in and configure NetBackup for Hadoop:
Use consistent conventions for hostnames of backup hosts, media servers, and master server. For example, if you are using the hostname as hadoop.veritas.com (FQDN format) use the same everywhere.
Add the entries of all the NameNodes and DataNodes to the
/etc/hostsfile on all the backup hosts. You must add the hostname in FQDN format.Or
Add the appropriate DNS entries in the
/etc/resolve.conffile.Always specify the NameNode and DataNodes in FQDN format.
Ping all the nodes (use FQDN) from the backup hosts.
Hostname and port of the NameNode must be same as you have specified with the http address parameter in the
core-site.xmlof the Hadoop cluster.