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  1. Hadoop HDFS
  2. HDFS-2547

ReplicationTargetChooser has incorrect block placement comments

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Details

    • Bug
    • Status: Closed
    • Trivial
    • Resolution: Fixed
    • 0.20.1
    • 1.1.0
    • namenode
    • None

    Description

      /** 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**.
       */
      

      That should read "second replica". The test cases confirm that this is the behavior, as well as the docs.

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            qwertymaniac Harsh J Assign to me
            qwertymaniac Harsh J
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