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https://issues.apache.org/jira/browse/HDFS-2166?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Uma Maheswara Rao G resolved HDFS-2166.
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Resolution: Duplicate
This is also addressed by HDFS-1971
> Datanodes should send block reports to both Active and Standby Namenodes.
> -------------------------------------------------------------------------
>
> Key: HDFS-2166
> URL: https://issues.apache.org/jira/browse/HDFS-2166
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: datanode, hdfs-client, namenode
> Reporter: Justin Joseph
>
> Datanode should send the Block Reports and Block Received commands to both
> Active and Standby Namenodes. It substantially reduces the time for Standby
> to take over as Active and enhances the service availability.
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