[
https://issues.apache.org/jira/browse/HDFS-3256?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13252870#comment-13252870
]
Hudson commented on HDFS-3256:
------------------------------
Integrated in Hadoop-Common-trunk-Commit #2067 (See
[https://builds.apache.org/job/Hadoop-Common-trunk-Commit/2067/])
HDFS-3256. HDFS considers blocks under-replicated if topology script is
configured with only 1 rack. Contributed by Aaron T. Myers. (Revision 1325531)
Result = SUCCESS
atm : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1325531
Files :
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockManager.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/DatanodeManager.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/blockmanagement/TestBlockManager.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/blockmanagement/TestBlocksWithNotEnoughRacks.java
> 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
> Fix For: 2.0.0
>
> Attachments: HDFS-3256.patch, HDFS-3256.patch, HDFS-3256.patch,
> HDFS-3256.patch, HDFS-3256.patch, 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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