[jira] [Commented] (HDFS-8543) Erasure Coding: processOverReplicatedBlock() handles striped block

[Zhe Zhang (JIRA)]

    [ 
https://issues.apache.org/jira/browse/HDFS-8543?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14581465#comment-14581465
 ] 

Zhe Zhang commented on HDFS-8543:
---------------------------------

Thanks for the update Walter.
{code}
      used.set(index);
      if (used.get(index)) {
{code}
Looks like the {{if}} will always hit {{true}}? Could you add some comments for 
{{used}} and {{duplicated}?

> Erasure Coding: processOverReplicatedBlock() handles striped block
> ------------------------------------------------------------------
>
>                 Key: HDFS-8543
>                 URL: https://issues.apache.org/jira/browse/HDFS-8543
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>            Reporter: Walter Su
>            Assignee: Walter Su
>         Attachments: HDFS-8543-HDFS-7285.01.patch, 
> HDFS-8543-HDFS-7285.02.patch, HDFS-8543-HDFS-7285.03.patch
>
>
> striped block group could be over replicated when: 1.dead DN comes back. 2. 
> Balancer/Mover copies block before deletes it.
> This jira add logic for processOverReplicatedBlock() handling striped block



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