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https://issues.apache.org/jira/browse/HDFS-1593?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12985858#action_12985858
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Todd Lipcon commented on HDFS-1593:
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I think for this to work correctly with security, the RPC needs to also include
an AccessToken for the destination cluster, and that needs to be passed into
the DataTransfer thread. As is, the accessToken generated is only valid on the
source cluster, so the write will be denied on the destination.
> Allow a datanode to copy a block to a datanode on a foreign HDFS cluster.
> -------------------------------------------------------------------------
>
> Key: HDFS-1593
> URL: https://issues.apache.org/jira/browse/HDFS-1593
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Reporter: dhruba borthakur
> Assignee: dhruba borthakur
> Attachments: copyBlockTrunk1.txt
>
>
> This patch introduces an RPC to the datanode to allow it to copy a block to a
> datanode on a remote HDFS cluster.
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