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From "Rohith (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-2268) Disallow formatting the RMStateStore when there is an RM running
Date Wed, 01 Apr 2015 07:16:53 GMT

    [ https://issues.apache.org/jira/browse/YARN-2268?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14390122#comment-14390122

Rohith commented on YARN-2268:

Thinking on this jira, getting many questions. 
# How to identify RM is running since RM can be formated from anywhere in the cluster? 
# In HA, for each rm-ids to be checked for serviceState. This would result in time consuming
for each hosts retry would take time. If switch happens in the middle while checking rm-ids,
it would give wrong result that all RM's are in standby.

I think if admin support is there, 1st can be solved easily.

> Disallow formatting the RMStateStore when there is an RM running
> ----------------------------------------------------------------
>                 Key: YARN-2268
>                 URL: https://issues.apache.org/jira/browse/YARN-2268
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: resourcemanager
>    Affects Versions: 2.6.0
>            Reporter: Karthik Kambatla
>            Assignee: Rohith
> YARN-2131 adds a way to format the RMStateStore. However, it can be a problem if we format
the store while an RM is actively using it. It would be nice to fail the format if there is
an RM running and using this store. 

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