sokui commented on PR #3835:
URL: https://github.com/apache/ozone/pull/3835#issuecomment-1279823072

   Hi @xBis7 ,  we should not deprecate dfs.datanode.use.datanode.hostname and 
always make it as false. This flag is also used by the users who deploy ozone 
to ip changing environment such as k8s. In those environments, the ip of the 
ozone components can be changed, and thus we should use the hostname for 
communication. 
   
   This PR is to make the datanodes to be adaptive to k8s environments by 
letting it use hostname. Please check it out. Thanks. 
https://github.com/apache/ozone/pull/3186


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