[jira] [Commented] (HBASE-5713) Introduce throttling during Instant schema change process to throttle opening/closing regions.

["Subbu M Iyer (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HBASE-5713?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13294717#comment-13294717 ] 

Subbu M Iyer commented on HBASE-5713:
-------------------------------------

Ted:

Attached a latest patch. 

1. Reduced the throttle time to 100ms.
2. Addressed your comments.

All unit tests passed.

As a next step, we need to get this tested in a production grade cluster and hope Lars can help us with that.

thanks 
                
> Introduce throttling during Instant schema change process to throttle opening/closing regions. 
> -----------------------------------------------------------------------------------------------
>
>                 Key: HBASE-5713
>                 URL: https://issues.apache.org/jira/browse/HBASE-5713
>             Project: HBase
>          Issue Type: Bug
>          Components: client, master, regionserver, shell
>            Reporter: Subbu M Iyer
>            Assignee: Subbu M Iyer
>            Priority: Minor
>         Attachments: 5713.txt, patch-v4.patch
>
>
> There is a potential for region open/close stampede during instant schema change process as the process attempts to close/open impacted regions in rapid succession. We need to introduce some kind of throttling to eliminate the race condition.

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