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https://issues.apache.org/jira/browse/HADOOP-7878?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13168342#comment-13168342
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Hudson commented on HADOOP-7878:
--------------------------------
Integrated in Hadoop-Hdfs-0.23-Build #106 (See
[https://builds.apache.org/job/Hadoop-Hdfs-0.23-Build/106/])
HADOOP-7878 Regression: HADOOP-7777 switch changes break HDFS tests when
the isSingleSwitch() predicate is used
stevel : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1213264
Files :
*
/hadoop/common/branches/branch-0.23/hadoop-common-project/hadoop-common/CHANGES.txt
*
/hadoop/common/branches/branch-0.23/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/net/StaticMapping.java
*
/hadoop/common/branches/branch-0.23/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/net/TestStaticMapping.java
> Regression HADOOP-7777 switch changes break HDFS tests when the
> isSingleSwitch() predicate is used
> --------------------------------------------------------------------------------------------------
>
> Key: HADOOP-7878
> URL: https://issues.apache.org/jira/browse/HADOOP-7878
> Project: Hadoop Common
> Issue Type: Bug
> Components: util
> Affects Versions: 0.23.0, 0.24.0
> Reporter: Steve Loughran
> Assignee: Steve Loughran
> Priority: Minor
> Labels: regression
> Fix For: 0.24.0, 0.23.1
>
> Attachments: HADOOP-7878.patch, HADOOP-7878.patch
>
> Original Estimate: 0.5h
> Remaining Estimate: 0.5h
>
> This doesn't show up until you apply the HDFS-2492 patch, but the attempt to
> make the {{StaticMapping}} topology clever by deciding if it is single rack
> or multi rack based on its rack->node mapping breaks the HDFS
> {{TestBlocksWithNotEnoughRacks}} test. Why? Because the racks go in after the
> switch topology is cached by the {{BlockManager}}, which assumes the system
> is always single-switch.
> Fix: default to assuming multi-switch; remove the intelligence, add a setter
> for anyone who really wants to simulate single-switch racks.
> Test: verify that a newly created simple mapping is multi switch
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