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Posted to mapreduce-issues@hadoop.apache.org by "Steve Loughran (JIRA)" <ji...@apache.org> on 2011/08/02 18:05:27 UTC

[jira] [Commented] (MAPREDUCE-2750) [MR-279] NodeManager should start its servers on ephemeral ports

    [ https://issues.apache.org/jira/browse/MAPREDUCE-2750?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13076288#comment-13076288 ] 

Steve Loughran commented on MAPREDUCE-2750:
-------------------------------------------

How about making it an option to start on an ephemeral port, as in production it will only complicate firewall setup. 

> [MR-279] NodeManager should start its servers on ephemeral ports 
> -----------------------------------------------------------------
>
>                 Key: MAPREDUCE-2750
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-2750
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: mrv2
>    Affects Versions: 0.23.0
>            Reporter: Vinod Kumar Vavilapalli
>             Fix For: 0.23.0
>
>
> There is absolutely no need for NM to start ContainerManager on a standard port, it should bind to an ephemeral port. Binding on ephemeral ports will help us start multiple NMs on a single node without any issues.
> The same holds for the ResourceLocalizationService's server port and NM Http server's port. 

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