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From "yeshavora (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-1057) Add mechanism to check validity of a Node to be Added/Excluded
Date Mon, 12 Aug 2013 16:58:48 GMT

    [ https://issues.apache.org/jira/browse/YARN-1057?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13737030#comment-13737030

yeshavora commented on YARN-1057:

By 'Invalide hostname/node', I mean the incorrect name of the host/node which does not exists.
Currently, Yarn just adds the invalid hostname without checking its existence. Like below.

INFO  util.HostsFileReader (HostsFileReader.java:readFileToSet(68)) - Adding invalidhost.net
to the list of included hosts from Include_Yarn_File  

Yarn should firstly confirms host's existence and then include/exclude them. 
> Add mechanism to check validity of a Node to be Added/Excluded
> --------------------------------------------------------------
>                 Key: YARN-1057
>                 URL: https://issues.apache.org/jira/browse/YARN-1057
>             Project: Hadoop YARN
>          Issue Type: Improvement
>    Affects Versions: 2.1.0-beta
>            Reporter: yeshavora
> Yarn does not complain while passing an invalid hostname like 'invalidhost.com' inside
include/exclude node file. (specified by 'yarn.resourcemanager.nodes.include-path' or 'yarn.resourcemanager.nodes.exclude-path').
> Need to add a mechanism to check the validity of the hostname before including or excluding
from cluster. It should throw an error / exception while adding/removing an invalid node.

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