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https://issues.apache.org/jira/browse/HDFS-10359?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15268894#comment-15268894
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Arpit Agarwal commented on HDFS-10359:
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I agree with [~linyiqun]. This could bring down the NameNode or at least make
it very busy for a while. Not in favor of adding it.
> Allow trigger block report from all datanodes
> ---------------------------------------------
>
> Key: HDFS-10359
> URL: https://issues.apache.org/jira/browse/HDFS-10359
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: datanode
> Affects Versions: 2.7.0, 2.6.1
> Reporter: Tao Jie
>
> Since we have HDFS-7278 allows trigger block report from one certain
> datanode. It would be helpful to add a option to this command to trigger
> block report from all datanodes.
> Command maybe like this:
> *hdfs dfsadmin -triggerBlockReport \[-incremental\]
> <datanode_host:ipc_port|all>*
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