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Posted to common-dev@hadoop.apache.org by "Doug Cutting (JIRA)" <ji...@apache.org> on 2006/05/12 22:10:09 UTC
[jira] Commented: (HADOOP-214) ClusterTestDFS fails
[ http://issues.apache.org/jira/browse/HADOOP-214?page=comments#action_12383263 ]
Doug Cutting commented on HADOOP-214:
-------------------------------------
Having to change the hosts file for a test is not great.
Perhaps we could instead just alter Java to resolve hostnames differently while testing?
http://forum.java.sun.com/thread.jspa?threadID=729300
> 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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