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https://issues.apache.org/jira/browse/HADOOP-11676?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14351476#comment-14351476
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Hadoop QA commented on HADOOP-11676:
------------------------------------
{color:red}-1 overall{color}. Here are the results of testing the latest
attachment
http://issues.apache.org/jira/secure/attachment/12703217/HADOOP-11676.patch
against trunk revision 608ebd5.
{color:green}+1 @author{color}. The patch does not contain any @author
tags.
{color:green}+1 tests included{color}. The patch appears to include 1 new
or modified test files.
{color:green}+1 javac{color}. The applied patch does not increase the
total number of javac compiler warnings.
{color:green}+1 javadoc{color}. There were no new javadoc warning messages.
{color:green}+1 eclipse:eclipse{color}. The patch built with
eclipse:eclipse.
{color:green}+1 findbugs{color}. The patch does not introduce any new
Findbugs (version 2.0.3) warnings.
{color:green}+1 release audit{color}. The applied patch does not increase
the total number of release audit warnings.
{color:red}-1 core tests{color}. The patch failed these unit tests in
hadoop-common-project/hadoop-common hadoop-hdfs-project/hadoop-hdfs:
org.apache.hadoop.hdfs.TestRollingUpgrade
org.apache.hadoop.hdfs.server.balancer.TestBalancer
Test results:
https://builds.apache.org/job/PreCommit-HADOOP-Build/5879//testReport/
Console output:
https://builds.apache.org/job/PreCommit-HADOOP-Build/5879//console
This message is automatically generated.
> Add API to NetworkTopology for getting all racks
> ------------------------------------------------
>
> Key: HADOOP-11676
> URL: https://issues.apache.org/jira/browse/HADOOP-11676
> Project: Hadoop Common
> Issue Type: Sub-task
> Reporter: Walter Su
> Assignee: Walter Su
> Attachments: HADOOP-11676.patch
>
>
> The existing two NetworkTopology.chooseRandom(..) API support choosing node
> from scope and choosing outside scope. BlockPlacementPolicyDefault class use
> these two API to choose node from one rack or choose outside one rack.
> We want to implement a new placement policy called
> BlockPlacementPolicyFaultTolerant which tries its best to place replicas to
> most racks. To achieve this, We need to know how many replicas each rack has.
> And first, we need to get all racks.
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