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https://issues.apache.org/jira/browse/HDFS-7278?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14180775#comment-14180775
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Aaron T. Myers commented on HDFS-7278:
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I think it's a good tool to have in our toolbox to work around possible bugs in
NN replica accounting. If an operator suspects such an issue, they might be
tempted to restart a DN, or all of the DNs in a cluster, in order to trigger
full block reports. It'd be much lighter weight if instead the operator could
just manually trigger a full BR instead of having to restart the DN and
therefore need to scan all the DN data dirs, etc.
> Add a command that allows sysadmins to manually trigger full block reports
> from a DN
> ------------------------------------------------------------------------------------
>
> Key: HDFS-7278
> URL: https://issues.apache.org/jira/browse/HDFS-7278
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: datanode
> Affects Versions: 2.6.0
> Reporter: Colin Patrick McCabe
> Assignee: Colin Patrick McCabe
> Attachments: HDFS-7278.002.patch
>
>
> We should add a command that allows sysadmins to manually trigger full block
> reports from a DN.
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