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From "Hadoop QA (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-8046) Revert ScriptBasedMapping semantics to the existing ones, add DNS mapping diagnostics in progress
Date Fri, 17 Feb 2012 15:55:59 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-8046?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13210344#comment-13210344

Hadoop QA commented on HADOOP-8046:

+1 overall.  Here are the results of testing the latest attachment 
  against trunk revision .

    +1 @author.  The patch does not contain any @author tags.

    +1 tests included.  The patch appears to include 9 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 eclipse:eclipse.  The patch built with eclipse:eclipse.

    +1 findbugs.  The patch does not introduce any new Findbugs (version 1.3.9) warnings.

    +1 release audit.  The applied patch does not increase the total number of release audit

    +1 core tests.  The patch passed unit tests in .

    +1 contrib tests.  The patch passed contrib unit tests.

Test results: https://builds.apache.org/job/PreCommit-HADOOP-Build/611//testReport/
Console output: https://builds.apache.org/job/PreCommit-HADOOP-Build/611//console

This message is automatically generated.
> Revert ScriptBasedMapping semantics to the existing ones, add DNS mapping diagnostics
in progress
> -------------------------------------------------------------------------------------------------
>                 Key: HADOOP-8046
>                 URL: https://issues.apache.org/jira/browse/HADOOP-8046
>             Project: Hadoop Common
>          Issue Type: Bug
>    Affects Versions: 0.23.0, 0.24.0
>            Reporter: Steve Loughran
>            Assignee: Steve Loughran
>            Priority: Minor
>         Attachments: HADOOP-8046.patch, HADOOP-8046.patch
>   Original Estimate: 2h
>  Remaining Estimate: 2h
> HADOOP-7878 still doesn't let the block manager switch to non-scripted topologies because
the static mapping is still getting it wrong -it should just look at the configuration for
a non-null script name, as per the usual {{ScriptBasedMapping}}, so as to keep tests backwards
> In the process, make it possible to debug topologies by
> # {{#toString()}} operations to provide summary information, and for the {{CachedDNSToSwitchMapping}},
to include information on the inner mapping. {{ScriptBasedMapping}} to include the script
> # {{AbstractDNSToSwitchMapping} to offer a method {{getSwitchMap()}} to return a cloned
map of the mapping, or null if this is not known.
> # {{AbstractDNSToSwitchMapping} to offer a method {{dumpTopology()}} to take this switch
map and the toString() and generate a topology dump suitable for humans.
> # Implementing the switch map method for the standard mappings (Cached -> cached map,
Static -> static map, Script -> null).
> These methods are all for debugging, but there is no reason not to use the contents of
{{getSwitchMap()}} in service web pages providing details on the service's current view of
the network topology, as it may differ from the expectations of the script author.
> time: 30m to implement, 1h30 to write more tests and run them.

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