> On Sep 5, 2017, at 6:23 PM, Jian He <j...@hortonworks.com> wrote:
> 
>>      If it doesn’t have all the bells and whistles, then it shouldn’t be on 
>> port 53 by default.
> Sure, I’ll change the default port to not use 53 and document it.
>>      *how* is it getting launched on a privileged port? It sounds like the 
>> expectation is to run “command” as root.   *ALL* of the previous daemons in 
>> Hadoop that needed a privileged port used jsvc.  Why isn’t this one? These 
>> questions matter from a security standpoint.  
> Yes, it is running as “root” to be able to use the privileged port. The DNS 
> server is not yet integrated with the hadoop script. 
> 
>> Check the output.  It’s pretty obviously borked:
> Thanks for pointing out. Missed this when rebasing onto trunk.


        Please correct me if I’m wrong, but the current summary of the branch, 
post these changes, looks like:

                * A bunch of mostly new Java code that may or may not have 
javadocs (post-revert YARN-6877, still working out HADOOP-14835)
                * ~1/3 of the docs are roadmap/TBD
                * ~1/3 of the docs are for an optional DNS daemon that has no 
end user hook to start it
                * ~1/3 of the docs are for a REST API that comes from some 
undefined daemon (apiserver?)
                * Two new, but undocumented, subcommands to yarn
                * There are no docs for admins or users on how to actually 
start or use this completely new/separate/optional feature

        How are outside people (e.g., non-branch committers) supposed to test 
this new feature under these conditions?
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