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Posted to hdfs-dev@hadoop.apache.org by "Aaron T. Myers (Created) (JIRA)" <ji...@apache.org> on 2012/04/11 23:33:18 UTC

[jira] [Created] (HDFS-3256) HDFS considers blocks under-replicated if topology script is configured with only 1 rack

HDFS considers blocks under-replicated if topology script is configured with only 1 rack
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                 Key: HDFS-3256
                 URL: https://issues.apache.org/jira/browse/HDFS-3256
             Project: Hadoop HDFS
          Issue Type: Bug
    Affects Versions: 2.0.0
            Reporter: Aaron T. Myers
            Assignee: Aaron T. Myers


HDFS treats the mere presence of a topology script being configured as of evidence that there are multiple racks. If there is in fact only a single rack, the NN will try to place the blocks on at least two racks, and thus blocks will be considered to be under-replicated.

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