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https://issues.apache.org/jira/browse/HDFS-16964?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17705763#comment-17705763
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ASF GitHub Bot commented on HDFS-16964:
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zhangshuyan0 commented on PR #5510:
URL: https://github.com/apache/hadoop/pull/5510#issuecomment-1486118554
@Hexiaoqiao Thanks. I've checked it out.
> Improve processing of excess redundancy after failover
> ------------------------------------------------------
>
> Key: HDFS-16964
> URL: https://issues.apache.org/jira/browse/HDFS-16964
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: Shuyan Zhang
> Assignee: Shuyan Zhang
> Priority: Major
> Labels: pull-request-available
>
> After failover, the block with excess redundancy cannot be processed until
> all replicas are not stale, because the stale ones may have been deleted.
> That is to say, we need to wait for the FBRs of all datanodes on which the
> block resides before deleting the redundant replicas. This is unnecessary, we
> can bypass stale replicas when dealing with excess replicas, and delete
> non-stale excess replicas in a more timely manner.
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