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From "Kai Zheng (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-11535) TableMapping related tests failed due to 'correct' resolving for test hostname
Date Tue, 03 Feb 2015 12:17:34 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-11535?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14303163#comment-14303163

Kai Zheng commented on HADOOP-11535:

Hi Steve, thanks for your response.
bq. the IETF mandates that these hostnames must never resolve
Would you clarify which hostnames not to resolve ? Does "a.b.c" be such one ? Which IETF spec
states this ? 
I'd like to investigate a bit further, because it always resolves in my company dev environment,
which fails the tests.

> TableMapping related tests failed due to 'correct' resolving for test hostname
> ------------------------------------------------------------------------------
>                 Key: HADOOP-11535
>                 URL: https://issues.apache.org/jira/browse/HADOOP-11535
>             Project: Hadoop Common
>          Issue Type: Test
>            Reporter: Kai Zheng
>            Assignee: Kai Zheng
>            Priority: Minor
> When mvn test in my environment, it reported the following.
> {noformat}
> Failed tests: 
>   TestTableMapping.testClearingCachedMappings:144 expected:</[rack1]> but was:</[default-rack]>
>   TestTableMapping.testTableCaching:79 expected:</[rack1]> but was:</[default-rack]>
>   TestTableMapping.testResolve:56 expected:</[rack1]> but was:</[default-rack]>
> {noformat}
> It's caused by the good resolving for the 'bad test' hostname 'a.b.c' as follows.
> {noformat}
> [drankye@zkdesk hadoop-common-project]$ ping a.b.c
> PING a.b.c ( 56(84) bytes of data.
> {noformat}
> I understand it may happen in just my local environment, and document this just in case
others also meet this. We may use even worse hostname than 'a.b.c' to avoid such situation.

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