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https://issues.apache.org/jira/browse/HADOOP-4865?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12656727#action_12656727
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Raghu Angadi commented on HADOOP-4865:
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> I would just make 'verifyFirstBlock()' to look at the manual list first.
Or if this needs to happen asap, we also should make sure that it is not
throttled (by adding another flag in the lines of 'REMOTE_READ') and run it in
a its own thread.
> 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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