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https://issues.apache.org/jira/browse/YARN-5072?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15285178#comment-15285178
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Allen Wittenauer commented on YARN-5072:
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bq. should be able to point to a list of files each of which belongs to one
HDFS cluster
Why? Is there something wrong with making a single file with all of the hosts?
> Support comma separated list of includes and excludes files
> -----------------------------------------------------------
>
> Key: YARN-5072
> URL: https://issues.apache.org/jira/browse/YARN-5072
> Project: Hadoop YARN
> Issue Type: Improvement
> Reporter: Ming Ma
> Assignee: Ming Ma
> Attachments: YARN-5072.patch
>
>
> When a yarn cluster shares the same hosts as the underlying HDFS cluster, we
> have {{yarn.resourcemanager.nodes.include-path}} point to the same file or
> symlink of the {{dfs.hosts}} file used by HDFS to make admin easier.
> If we want to set up a yarn cluster to run on the same hosts of several HDFS
> clusters combined, it means {{yarn.resourcemanager.nodes.include-path}}
> should be able to point to a list of files each of which belongs to one HDFS
> cluster.
> Backward compatibility, it seems ok to continue to reuse
> {{yarn.resourcemanager.nodes.include-path}} as long as it can still take a
> single file.
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