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From "Junping Du (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HADOOP-8471) Make ReplicaPlacementPolicyDefault extensible for reuse code in subclass
Date Mon, 04 Jun 2012 18:08:24 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-8471?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Junping Du updated HADOOP-8471:
-------------------------------

    Issue Type: Bug  (was: Sub-task)
        Parent:     (was: HADOOP-8468)
    
> 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: Bug
>          Components: ha, io
>    Affects Versions: 1.0.0, 2.0.0-alpha
>            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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