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https://issues.apache.org/jira/browse/HDFS-14431?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17216158#comment-17216158
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Jinglun commented on HDFS-14431:
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Hi [~ayushtkn], the HDFS-15294 only supports using a command to rename a path
to another namespace. To rename across Namespaces there are some future works
to do:
1) Give Router the ability to rename across Namespaces. To implement this we
need let HDFS-15294 run in the Router. One thing needs to be carefully thought
is if one Router crashes, how does the 'balance jobs' failover to other Router.
2) The client-side timeout. Rename across namespaces takes much longer than
normal rename(it uses distcp) and definitely would cause the client rpc timeout.
> RBF: Rename with multiple subclusters should fail if no eligible locations
> --------------------------------------------------------------------------
>
> Key: HDFS-14431
> URL: https://issues.apache.org/jira/browse/HDFS-14431
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Reporter: Íñigo Goiri
> Assignee: Íñigo Goiri
> Priority: Major
> Attachments: HDFS-14431-HDFS-13891.001.patch,
> HDFS-14431-HDFS-13891.002.patch, HDFS-14431-HDFS-13891.003.patch,
> HDFS-14431-HDFS-13891.004.patch, HDFS-14431-HDFS-13891.005.patch,
> HDFS-14431-HDFS-13891.006.patch, HDFS-14431-HDFS-13891.007.patch
>
>
> Currently, the rename will fail with FileNotFoundException which is not clear
> to the user.
> The operation should fail stating the reason is that there are no eligible
> destinations.
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