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From "Brahma Reddy Battula (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-11146) Excess replicas will not be deleted until all storages's FBR received after failover
Date Thu, 17 Nov 2016 15:48:58 GMT

    [ https://issues.apache.org/jira/browse/HDFS-11146?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15674031#comment-15674031
] 

Brahma Reddy Battula commented on HDFS-11146:
---------------------------------------------

[~kihwal] thanks for taking look.

bq.NN could tell datanodes to send FBR in a heartbeat response.

Yes,it's good idea. we can do this but we should not ask all at once.this needs to take care.

> Excess replicas will not be deleted until all storages's FBR received after failover
> ------------------------------------------------------------------------------------
>
>                 Key: HDFS-11146
>                 URL: https://issues.apache.org/jira/browse/HDFS-11146
>             Project: Hadoop HDFS
>          Issue Type: Bug
>            Reporter: Brahma Reddy Battula
>            Assignee: Brahma Reddy Battula
>
> Excess replicas will not be deleted until all storages's FBR received after failover.
> Thinking following soultion can help.
>  *Solution:* 
> I think after failover, As DNs aware of failover ,so they can send another block report
(FBR) irrespective of interval.May be some shuffle can be done, similar to initial delay.



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