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From "alan wootton (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-214) ClusterTestDFS fails
Date Fri, 12 May 2006 21:14:09 GMT
    [ http://issues.apache.org/jira/browse/HADOOP-214?page=comments#action_12383289 ] 

alan wootton commented on HADOOP-214:
-------------------------------------

Well, THAT looks like a nice trick (hacking the name resolver in java). I'll have to try it.
That would eliminate the need to change the hosts file.

Remember, these are long tests that nobody is currently running anyway. Running them is a
deliberate act and you only need to change your hosts file once. 



> ClusterTestDFS fails
> --------------------
>
>          Key: HADOOP-214
>          URL: http://issues.apache.org/jira/browse/HADOOP-214
>      Project: Hadoop
>         Type: Bug

>   Components: dfs
>     Versions: 0.2.1
>  Environment: local workstation (windows) 
>     Reporter: alan wootton
>  Attachments: fix_clustertestdfs.patch
>
> The dfs unit tests, from the ant target 'cluster' have been failing. (ClusterTestDFSNamespaceLogging,
ClusterTestDFS). I don't know if anyone but me cares about these tests, but I do. I would
like to write better tests for dns. I think we all need that.
> They have been partially broken since  "test.dfs.same.host.targets.allowed" went away
and replication ceased for these tests. 
> They got really broken when NameNode stopped automatically formatting itself .
> Since they seem to be ignored, I took the liberty of changing how they work.
> The main thing is, you must put this into your hosts file:
> 127.0.0.1       localhost0
> 127.0.0.1       localhost1
> 127.0.0.1       localhost2
> 127.0.0.1       localhost3
> 127.0.0.1       localhost4
> 127.0.0.1       localhost5
> 127.0.0.1       localhost6
> 127.0.0.1       localhost7
> 127.0.0.1       localhost8
> 127.0.0.1       localhost9
> 127.0.0.1       localhost10
> 127.0.0.1       localhost11
> 127.0.0.1       localhost12
> 127.0.0.1       localhost13
> 127.0.0.1       localhost14
> 127.0.0.1       localhost15
> This way you can start DataNodes, and TaskTrackers (up to 16 of them) with unique hostnames.
> Also, I changed all the places that used to call InetAddress.getLocalHost().getHostName()
to get it from a new method in Configuration (this issue is the same as http://issues.apache.org/jira/browse/HADOOP-197
).

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