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https://issues.apache.org/jira/browse/HDFS-2547?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Harsh J updated HDFS-2547:
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Status: Patch Available (was: Reopened)
> ReplicationTargetChooser has incorrect block placement comments
> ---------------------------------------------------------------
>
> Key: HDFS-2547
> URL: https://issues.apache.org/jira/browse/HDFS-2547
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: name-node
> Affects Versions: 0.20.1
> Reporter: Harsh J
> Assignee: Harsh J
> Priority: Trivial
> Fix For: 0.20.206.0
>
> Attachments: HDFS-2547.patch, HDFS-2547.patch
>
>
> {code}
> /** The class is responsible for choosing the desired number of targets
> * for placing block replicas.
> * The replica placement strategy is that if the writer is on a datanode,
> * the 1st replica is placed on the local machine,
> * otherwise a random datanode. The 2nd replica is placed on a datanode
> * that is on a different rack. The 3rd replica is placed on a datanode
> * which is on the same rack as the **first replca**.
> */
> {code}
> That should read "second replica". The test cases confirm that this is the
> behavior, as well as the docs.
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