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https://issues.apache.org/jira/browse/HDFS-3256?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Aaron T. Myers updated HDFS-3256:
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Description: HDFS treats the mere presence of a topology script being
configured as 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. (was: 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.)
> HDFS considers blocks under-replicated if topology script is configured with
> only 1 rack
> ----------------------------------------------------------------------------------------
>
> 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
> Attachments: HDFS-3256.patch
>
>
> HDFS treats the mere presence of a topology script being configured as
> 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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