mridulm commented on code in PR #2633:
URL: https://github.com/apache/celeborn/pull/2633#discussion_r1687585359


##########
docs/configuration/network.md:
##########
@@ -42,6 +42,7 @@ license: |
 | celeborn.<role>.rpc.dispatcher.threads | <value of 
celeborn.rpc.dispatcher.threads> | false | Threads number of message 
dispatcher event loop for roles |  |  | 
 | celeborn.io.maxDefaultNettyThreads | 64 | false | Max default netty threads 
| 0.3.2 |  | 
 | celeborn.network.bind.preferIpAddress | true | false | When `true`, prefer 
to use IP address, otherwise FQDN. This configuration only takes effects when 
the bind hostname is not set explicitly, in such case, Celeborn will find the 
first non-loopback address to bind. | 0.3.0 |  | 
+| celeborn.network.bind.wildcardAddress | false | false | When `true`, the 
bind address will be set to a wildcard address, while the advertise address 
will remain as whatever is set by `celeborn.network.bind.preferIpAddress`. This 
is helpful in dual-stack environments, where the service must listen to both 
IPv4 and IPv6 clients. | 0.6.0 |  | 

Review Comment:
   The specific scenario where this becomes relevant is as follows:
   
   If some of the compute infrastructure is IPv4 only, some v6 only and others 
dual stack - the way we can have a single Celeborn infra to cater to all is by:
   a) Set bind.preferip to false - so that advertised address is the host and 
not IP.
   
   b) bind to wild card address
   
   With both in place, the v4 only will resolve the v4 address and connect to 
v4 ip/port.
   Likewise, for v6 only.
   Dual stack compute nodes will use prefer ipv6 Java flag to resolve to either 
v4 or v6.
   
   



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