On Thu, Mar 4, 2010 at 2:01 PM, Edson Ramiro <erlfi...@gmail.com> wrote: > You don't need DNS. > > You can use the /etc/hosts. > > I'm using it here and it's working well. > > Edson Ramiro > > > On 4 March 2010 14:39, Allen Wittenauer <awittena...@linkedin.com> wrote: > >> >> >> >> On 3/3/10 3:38 PM, "jiang licht" <licht_ji...@yahoo.com> wrote: >> > Here's my question, I have to type my password (not PASSPHRASE for key) >> due to >> > some reverse name resolution problem when I do either SSH MASTER from >> SLAVE or >> > SSH SLAVE from MASTER. Since my system admin told me all ports are open >> > between them, I am wondering will this interactive authentication >> prevents >> > datanode/tasktracker from talking to namenode/jobtracker? >> >> If reverse name resolution isn't working, then you are going to have all >> sorts of problems. DNS needs to be properly configured. [I wish I knew >> where the whole "you don't need reverses configured for dns" thing came >> from >> amongst admins.] >> >> >
Adding an entry to DNS adds the entry to your forward and reverse lookup table, thus fixing/hiding the problem. Host file is not a winning strategy long term for obvious reasons :)
