What is the most idle way for a hadoop cluster's FQDN policy?

MindGlass — Sun, 18 Aug 2019 10:24:14 GMT

Here's hadoop cluster information in CentOS 6.7.

/etc/hosts

10.10.1.10 cm.hdp.com cm

10.10.1.11 nn01.hdp.com nn01

10.10.1.12 nn02.hdp.com nn02

10.10.1.13 yarn.hdp.com yarn

10.10.1.14 dn01.hdp.com dn01

10.10.1.15 dn02.hdp.com dn02

10.10.1.16 dn03.hdp.com dn03

In case of a node, nn01.hdp.com,

I wondering about HOSTNAME's value in '/etc/sysconfig/network'.

Following this link, it is recommend HOSTNAME pattern like that "FQDN".

Why is that HOSTNAME changed to FQDN?

I think, HOSTNAME value is not FQDN but HOSTNAME like this.

HOSTNAME=nn01

Re: What is the most idle way for a hadoop cluster's FQDN policy?

shivkumar82015 — Sat, 25 Mar 2017 22:51:40 GMT

You need to update in /etc/hosts as well.

1) /etc/sysconfig/network :- this used while internode communication

2) /etc/hosts while client connection this is going to use.

We need to set FQDN names on both file, this idle way