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From "Vinod Kumar Vavilapalli (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-4271) Make the NodeManager's health checker service pluggable
Date Sun, 26 Jun 2016 20:28:52 GMT

    [ https://issues.apache.org/jira/browse/YARN-4271?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15350226#comment-15350226
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Vinod Kumar Vavilapalli commented on YARN-4271:
-----------------------------------------------

Just caught up with this.

I am not sure if we even now understand the original need / use-case.

bq.     make the NodeHealthCheckerService more smarter instead of a boolean healthy/unhealthy
state.
bq. We were just looking into YARN-3503 and looks that will suffice for (2) presently.
Can you describe what was the original need for 'smarter' service, what it means and how it
is satisfied with YARN-3503? Trying to understand what is better built into the platform and
what is better left up to the higher layers by using things like JMX.

> 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: Sub-task
>          Components: nodemanager
>            Reporter: Subru Krishnan
>            Assignee: Raghav Mohan
>            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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