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https://issues.apache.org/jira/browse/HDFS-11146?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16109929#comment-16109929
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Rushabh S Shah commented on HDFS-11146:
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I started reviewing the patch.
I have one high level question.
bq. Yes,it's good idea. we can do this but we should not ask all at once.this
needs to take care.
Even in the latest patch, this will happen, correct ?
After a failover, namenode will ask for block report from all the nodes at once.
This will create a block report storm on namenode.
Correct me if I am wrong.
Sorry for reviewing so late.
> 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
> Attachments: HDFS-11146-002.patch, HDFS-11146-003.patch,
> HDFS-11146.patch
>
>
> 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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