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https://issues.apache.org/jira/browse/HDFS-4152?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13491683#comment-13491683
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Aaron T. Myers commented on HDFS-4152:
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The change looks fine to me, but why make this change on trunk instead of the
HDFS-2802 branch? There doesn't seem to be any motivation to make this change
except to support snapshots.
> Add a new class for the parameter in INode.collectSubtreeBlocksAndClear(..)
> ---------------------------------------------------------------------------
>
> Key: HDFS-4152
> URL: https://issues.apache.org/jira/browse/HDFS-4152
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: name-node
> Affects Versions: 3.0.0
> Reporter: Tsz Wo (Nicholas), SZE
> Assignee: Jing Zhao
> Priority: Minor
> Attachments: HDFS-4152.001.patch
>
>
> INode.collectSubtreeBlocksAndClear(..) currently uses a list to collect
> blocks for deletion. It cannot be extended to support other operation like
> updating the block-map. We propose to add a new class to encapsulate the
> abstraction.
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