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From "Hong Zhiguo (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-3965) Add starup timestamp for nodemanager
Date Fri, 24 Jul 2015 09:20:04 GMT

    [ https://issues.apache.org/jira/browse/YARN-3965?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14640195#comment-14640195

Hong Zhiguo commented on YARN-3965:

The polling doesn't need to happen frequently. Only when the operator NM upgrade or NM configuration

> Add starup timestamp for nodemanager
> ------------------------------------
>                 Key: YARN-3965
>                 URL: https://issues.apache.org/jira/browse/YARN-3965
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: nodemanager
>            Reporter: Hong Zhiguo
>            Assignee: Hong Zhiguo
>            Priority: Minor
> We have startup timestamp for RM already, but don't for NM.
> Sometimes cluster operator modified configuration of all nodes and kicked off command
to restart all NMs.  He found out it's hard for him to check whether all NMs are restarted.
 Actually there's always some NMs didn't restart as he expected, which leads to some error
later due to inconsistent configuration.
> If we have startup timestamp for NM,  the operator could easily fetch it via NM webservice
and find out which NM didn't restart, and take mannaul action for it.

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