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https://issues.apache.org/jira/browse/HADOOP-8471?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Junping Du updated HADOOP-8471:
-------------------------------
Status: Patch Available (was: Open)
This patch change interface of BlockPlacementPolicyDefault a bit which is
marked as @InterfaceAudience.Private.
> Make ReplicaPlacementPolicyDefault extensible for reuse code in subclass
> ------------------------------------------------------------------------
>
> Key: HADOOP-8471
> URL: https://issues.apache.org/jira/browse/HADOOP-8471
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: ha, io
> Affects Versions: 2.0.0-alpha, 1.0.0
> Reporter: Junping Du
> Assignee: Junping Du
> Attachments: Hadoop-8471-BlockPlacementDefault-extensible.patch
>
>
> ReplicaPlacementPolicy is already a pluggable component in Hadoop. A user
> specified ReplicaPlacementPolicy can be specified in the hdfs-site.xml
> configuration under the key "dfs.block.replicator.classname". However, to
> make it possible to reuse code in ReplicaPlacementPolicyDefault a few of its
> methods were changed from private to protected. ReplicaPlacementPolicy and
> BlockPlacementPolicyDefault are currently annotated with
> @InterfaceAudience.Private.
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