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From "Nikhil S. Ketkar (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-3315) Master-Worker Application on YARN
Date Wed, 04 Apr 2012 19:24:23 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-3315?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13246622#comment-13246622
] 

Nikhil S. Ketkar commented on MAPREDUCE-3315:
---------------------------------------------

I am using org.apache.hadoop.ipc.RPC.getServer(Class protocol, Object instance, String bindAddress,
int port, Configuration conf) to create a RPC server as follows.

{code}
    int linuxEphemeralPortRangeStart = 32768;
    int linuxEphemeralPortRangeEnd = 61000;
    int port = -1;
    for(int i = linuxEphemeralPortRangeStart; i <= linuxEphemeralPortRangeEnd; i++) {
      try {
        server = RPC.getServer(MWProtocol.class, this, hostname, i, conf);
        port = i;
        break;
      } catch (BindException e) {        
      }      
    }
    if (port == -1)
      throw new BindException();
    else {
      server.start();
      return port;      
{code}

Does RPC.getServer also pick a free port if 0 is specified? I tried to dig around but found
not find any information. What code should I be looking at to confirm this?
                
> Master-Worker Application on YARN
> ---------------------------------
>
>                 Key: MAPREDUCE-3315
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-3315
>             Project: Hadoop Map/Reduce
>          Issue Type: New Feature
>            Reporter: Sharad Agarwal
>            Assignee: Sharad Agarwal
>             Fix For: 0.24.0
>
>         Attachments: MAPREDUCE-3315-1.patch, MAPREDUCE-3315-2.patch, MAPREDUCE-3315.patch
>
>
> Currently master worker scenarios are forced fit into Map-Reduce. Now with YARN, these
can be first class and would benefit real/near realtime workloads and be more effective in
using the cluster resources.

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