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https://issues.apache.org/jira/browse/HDFS-12893?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16279405#comment-16279405
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Íñigo Goiri commented on HDFS-12893:
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Thanks [~virajith], I would change
{{ProvidedStorageMap#getDatanodeDescriptor()}} to something a little more
descriptive and move out the logic to check the regular DN case.
I would also include a javadoc there.
> [READ] Support replication of Provided blocks with non-default topologies.
> --------------------------------------------------------------------------
>
> Key: HDFS-12893
> URL: https://issues.apache.org/jira/browse/HDFS-12893
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Reporter: Virajith Jalaparti
> Assignee: Virajith Jalaparti
> Attachments: HDFS-12893-HDFS-9806.001.patch
>
>
> {{chooseSourceDatanodes}} returns the {{ProvidedDatanodeDescriptor}} as the
> source of Provided blocks. As this isn't a physical datanode and doesn't
> exist the topology, {{ReplicationWork.chooseTargets}} might fail depending on
> the chosen {{BlockPlacementPolicy}} implementation. This JIRA aims to fix
> this issue.
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