Currently the urls generated by the jobtracker & namenode return either hostnames like bubbles.local or just bubbles. These end up not resolving unless the client machine has specified these in their /etc/hosts file.
When I run the
hostname command on these machines it returns a hostname complete with the domain (E.G bubbles.example.com)
Running a small java test on these machines
InetAddress addr = InetAddress.getLocalHost(); byte ipAddr = addr.getAddress(); String hostname = addr.getHostName(); System.out.println(hostname);
Produces output just like the
Where else could hadoop be grabbing a hostname to use in its jobtracker / namenode UI?
This is occurring in clusters with Hadoop 1.0.3 and 1.0.4-SNAPSHOT from early august. The machines are running CentOS release 5.8 (Final).
The generated URLs I'm referring to are like this