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https://issues.apache.org/jira/browse/HADOOP-6397?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12806214#action_12806214
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Hadoop QA commented on HADOOP-6397:
-----------------------------------
+1 overall. Here are the results of testing the latest attachment
http://issues.apache.org/jira/secure/attachment/12431738/HADOOP-6397-v2.patch
against trunk revision 904339.
+1 @author. The patch does not contain any @author tags.
+1 tests included. The patch appears to include 3 new or modified tests.
+1 javadoc. The javadoc tool did not generate any warning messages.
+1 javac. The applied patch does not increase the total number of javac
compiler warnings.
+1 findbugs. The patch does not introduce any new Findbugs warnings.
+1 release audit. The applied patch does not increase the total number of
release audit warnings.
+1 core tests. The patch passed core unit tests.
+1 contrib tests. The patch passed contrib unit tests.
Test results:
http://hudson.zones.apache.org/hudson/job/Hadoop-Patch-h4.grid.sp2.yahoo.net/298/testReport/
Findbugs warnings:
http://hudson.zones.apache.org/hudson/job/Hadoop-Patch-h4.grid.sp2.yahoo.net/298/artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Checkstyle results:
http://hudson.zones.apache.org/hudson/job/Hadoop-Patch-h4.grid.sp2.yahoo.net/298/artifact/trunk/build/test/checkstyle-errors.html
Console output:
http://hudson.zones.apache.org/hudson/job/Hadoop-Patch-h4.grid.sp2.yahoo.net/298/console
This message is automatically generated.
> topology script called with host names instead of IP addresses
> --------------------------------------------------------------
>
> Key: HADOOP-6397
> URL: https://issues.apache.org/jira/browse/HADOOP-6397
> Project: Hadoop Common
> Issue Type: Bug
> Components: util
> Affects Versions: 0.22.0
> Reporter: Christian Kunz
> Attachments: HADOOP-6397-v2.patch, HADOOP-6397.patch
>
>
> According to the 'Hadoop Rack Awareness' section on
> http://hadoop.apache.org/common/docs/r0.20.0/cluster_setup.html the
> script/program topology.script.file.name can assume that names are passed in
> as IP addresses.
> This seems to work for hdfs, but the rack-awareness of the JobTracker does
> not always work, depending on the hostnames of the cluster, because of a bug
> in the method normalizeHostName of org.apache.hadoop.net.NetUtils.java:
> It returns the host name as-is when it decides that the string passed-in is
> already an IP but actually it checks whether the string starts with a valid
> hex character!
> There is no need to check at all, because InetAddress.getByName is smart
> enough to not do a dns lookup when the name is an IP address.
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