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https://issues.apache.org/jira/browse/YARN-4271?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14975633#comment-14975633
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Akihiro Suda commented on YARN-4271:
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There has been already [External Health 
Script|https://github.com/apache/hadoop/blob/ea6b183a1a649ad2874050ade8856286728c654c/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-site/src/site/markdown/NodeManager.md#external-health-script],
 which is very pluggable.
Does it work for you?


> Make the NodeManager's health checker service pluggable
> -------------------------------------------------------
>
>                 Key: YARN-4271
>                 URL: https://issues.apache.org/jira/browse/YARN-4271
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: nodemanager
>            Reporter: Subru Krishnan
>            Priority: Minor
>
> This JIRA proposes making the NodeHealthCheckerService in the NM pluggable as 
> in cloud environments like Azure we want to tap into the provided health 
> checkers for disk and other service signal statuses. The idea is to extend 
> the existing NodeHealthCheckerService and hook in custom implementation to 
> evaluate if the node is healthy or not.



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