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https://issues.apache.org/jira/browse/YARN-1057?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13753992#comment-13753992
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yeshavora commented on YARN-1057:
---------------------------------
Hitesh, the usecase will be when invalid hosts are added in include/exclude
file, Yarn should recognize them and does not add/remove node from cluster.
Yarn should not print below message.
INFO util.HostsFileReader (HostsFileReader.java:readFileToSet(68)) - Adding
invalidhost.net to the list of included hosts from /tmp/yarn.include
Ideally it should say something like "java.net.UnknownHostException:
invalidhost.net"
I believe RM shutdown is not needed as long as It can verify existence of a
host.
> 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
> Assignee: Xuan Gong
> Attachments: YARN-1057.1.patch
>
>
> 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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