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From "alan wootton (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-214) ClusterTestDFS fails
Date Fri, 12 May 2006 19:50:08 GMT
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:       localhost0       localhost1       localhost2       localhost3       localhost4       localhost5       localhost6       localhost7       localhost8       localhost9       localhost10       localhost11       localhost12       localhost13       localhost14       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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