Github user dtrott commented on a diff in the pull request:

    https://github.com/apache/curator/pull/2#discussion_r10436396
  
    --- Diff: 
curator-x-discovery/src/main/java/org/apache/curator/x/discovery/details/ServiceDiscoveryImpl.java
 ---
    @@ -146,7 +146,10 @@ public void close() throws IOException
         @Override
         public void registerService(ServiceInstance<T> service) throws 
Exception
         {
    -        services.put(service.getId(), service);
    --- End diff --
    
    My thinking here was that a permanent service should extend beyond the 
scope of the client used to register it (either directly or via the rest 
service) - what is the definition of "permanent" otherwise, therefore details 
of the service would be lost (not in memory) when the client was restarted 
anyway.
    
    To avoid two different modes (registering client verses later client) I 
decided that no client should keep a record of it.
    The alternative would have been to have all clients (watch zookeeper and) 
load permanent registrations from Zookeeper.
    
    From a design perspective I see this alternative as perfectly reasonable 
too, its just its a bunch more work and still represents a change in current 
functionality.
    
    What are your thoughts?


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