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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-5338) Add a conf to disable hostname check in DN registration
Date Thu, 10 Oct 2013 04:28:42 GMT

    [ https://issues.apache.org/jira/browse/HDFS-5338?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13791181#comment-13791181
] 

Hadoop QA commented on HDFS-5338:
---------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12607722/h5338_20131009.patch
  against trunk revision .

    {color:green}+1 @author{color}.  The patch does not contain any @author tags.

    {color:red}-1 tests included{color}.  The patch doesn't appear to include any new or modified
tests.
                        Please justify why no new tests are needed for this patch.
                        Also please list what manual steps were performed to verify this patch.

    {color:green}+1 javac{color}.  The applied patch does not increase the total number of
javac compiler warnings.

    {color:green}+1 javadoc{color}.  The javadoc tool did not generate any 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
1.3.9) warnings.

    {color:green}+1 release audit{color}.  The applied patch does not increase the total number
of release audit warnings.

    {color:green}+1 core tests{color}.  The patch passed unit tests in hadoop-hdfs-project/hadoop-hdfs.

    {color:green}+1 contrib tests{color}.  The patch passed contrib unit tests.

Test results: https://builds.apache.org/job/PreCommit-HDFS-Build/5161//testReport/
Console output: https://builds.apache.org/job/PreCommit-HDFS-Build/5161//console

This message is automatically generated.

> Add a conf to disable hostname check in DN registration
> -------------------------------------------------------
>
>                 Key: HDFS-5338
>                 URL: https://issues.apache.org/jira/browse/HDFS-5338
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: namenode
>            Reporter: Tsz Wo (Nicholas), SZE
>            Assignee: Tsz Wo (Nicholas), SZE
>         Attachments: h5338_20131009.patch
>
>
> During DN registration, if the ip and the hostname in the DN InetAddress are different,
the DN will be disallowed to register, where the DN InetAddress was obtained from the socket.
 It is a performance improvement added by HDFS-3990 to avoid unnecessary DNS resolutions.
> We propose to add a conf property for disabling the check.  Otherwise, clusters without
reverse DNS lookup support does not work.



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