Naganarasimha G R commented on YARN-1994:

Hi [~cwelch] & [~arpitagarwal],
I have few doubts for configuring NM_BIND_HOST & NM_ADDRESS as per the existing 
trunk/branch 2 code 
if (bindHost != null && !bindHost.isEmpty()
        && nmAddress != null && !nmAddress.isEmpty()) {
            hostOverride = nmAddress.split(":")[0];
// setup node ID
    InetSocketAddress connectAddress;
    if (delayedRpcServerStart) {
      connectAddress = NetUtils.getConnectAddress(initialAddress);
    } else {
      connectAddress = NetUtils.getConnectAddress(server);
    NodeId nodeId = buildNodeId(connectAddress, hostOverride);
# IIUC  if NM_BIND_HOST is then NM_ADDRESS's host part needs to be used 
for NODE_ID but what if proper IP is configured for NM_BIND_HOST then is it 
correct to take NM_ADDRESS's host part ? Is it assumed that NM_BIND_HOST is 
configured to specific IP then NM_ADDRESS is also configured to the same IP ?
# May be this a layman question why is it required to bind to all/multiple 
interfaces ?

> Expose YARN/MR endpoints on multiple interfaces
> -----------------------------------------------
>                 Key: YARN-1994
>                 URL: https://issues.apache.org/jira/browse/YARN-1994
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: nodemanager, resourcemanager, webapp
>    Affects Versions: 2.4.0
>            Reporter: Arpit Agarwal
>            Assignee: Craig Welch
>             Fix For: 2.6.0
>         Attachments: YARN-1994.0.patch, YARN-1994.1.patch, 
> YARN-1994.11.patch, YARN-1994.11.patch, YARN-1994.12.patch, 
> YARN-1994.13.patch, YARN-1994.14.patch, YARN-1994.15-branch2.patch, 
> YARN-1994.15.patch, YARN-1994.2.patch, YARN-1994.3.patch, YARN-1994.4.patch, 
> YARN-1994.5.patch, YARN-1994.6.patch, YARN-1994.7.patch
> YARN and MapReduce daemons currently do not support specifying a wildcard 
> address for the server endpoints. This prevents the endpoints from being 
> accessible from all interfaces on a multihomed machine.
> Note that if we do specify INADDR_ANY for any of the options, it will break 
> clients as they will attempt to connect to We need a solution that 
> allows specifying a hostname or IP-address for clients while requesting 
> wildcard bind for the servers.
> (List of endpoints is in a comment below)

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