A hbase cluster with three nodes is now configured.
configuration in the hosts file:

10.3.0.173      node1
10.3.0.172      node2
10.3.0.174      node3

at the beginning, the java client queried the data and reported an error:
Caused by: java.net.UnknownHostException: can not resolve node1,60020,1543906659360 ,
because the client machine (local win10) does not have a hosts file configured .
add the above hosts mapping to the client machine, and then you can access the data normally and query the data.

question:
this is a bit troublesome, and the corresponding hosts mapping should be configured on the machine where the client is located.
from the error message, you can see the general process:

1. (java), ip: 10.3.0.173  node1 -->
2. java node1 -->
3. ,  node1 
   hosts, , .

my confusion is: why does the cluster return the domain name to the client instead of returning IP, directly so that the client does not need to configure hosts mapping, but can access it according to IP?