Shuyi Zhang created YARN-11391:
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             Summary: Support using DNS to resolve yarn services to IP addresses
                 Key: YARN-11391
                 URL: https://issues.apache.org/jira/browse/YARN-11391
             Project: Hadoop YARN
          Issue Type: New Feature
            Reporter: Shuyi Zhang


We have been using A-record (hostname) for discovering YARN control planes(RM, 
JHS) from both the server and client sides. The components discover each other 
using hostnames (DNS A-records) which are preconfigured in YARN configurations 
(mapred-site.xml and yarn-site.xml). However, the hard-coded address mapping is 
prohibitive to perform appropriate failure recovery and node replacement. Any 
host replacement, adding, or removing requires client integration, which is a 
quite painful process. 

It is essential to find a solution where the discovery configuration of 
different components in the cluster stays intact and is able to resolve with 
the latest hostname/records. 



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