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https://issues.apache.org/jira/browse/HADOOP-4865?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12656754#action_12656754
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Konstantin Shvachko commented on HADOOP-4865:
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If {{DatanodeProtocol}} changes then its {{versionID}} should be incremented.
> Trigger block scans for datanode
> --------------------------------
>
> Key: HADOOP-4865
> URL: https://issues.apache.org/jira/browse/HADOOP-4865
> Project: Hadoop Core
> Issue Type: New Feature
> Components: dfs
> Reporter: Brian Bockelman
> Attachments: manual_block_scan.patch
>
>
> Provide a mechanism to trigger block scans in a datanode upon request.
> Support interfaces for commands sent by the namenode and through the HTTP
> interface.
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