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From "Suresh Srinivas (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HDFS-1669) Federation: Datanode servlets need information about the namenode to service the request
Date Tue, 01 Mar 2011 04:35:36 GMT

    [ https://issues.apache.org/jira/browse/HDFS-1669?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13000714#comment-13000714
] 

Suresh Srinivas commented on HDFS-1669:
---------------------------------------

With patch TestHftpFileSystem and TestFiHftp passes. Here is the testpatch result:
     [exec] -1 overall.  
     [exec] 
     [exec]     +1 @author.  The patch does not contain any @author tags.
     [exec] 
     [exec]     +1 tests included.  The patch appears to include 6 new or modified tests.
     [exec] 
     [exec]     -1 javadoc.  The javadoc tool appears to have generated 1 warning messages.
     [exec] 
     [exec]     +1 javac.  The applied patch does not increase the total number of javac compiler
warnings.
     [exec] 
     [exec]     +1 findbugs.  The patch does not introduce any new Findbugs warnings.
     [exec] 
     [exec]     +1 release audit.  The applied patch does not increase the total number of
release audit warnings.
     [exec] 
     [exec]     +1 system tests framework.  The patch passed system tests framework compile.


The javadoc warning is unrelated to the patch.

> Federation: Datanode servlets need information about the namenode to service the request
> ----------------------------------------------------------------------------------------
>
>                 Key: HDFS-1669
>                 URL: https://issues.apache.org/jira/browse/HDFS-1669
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: data-node, name-node
>    Affects Versions: Federation Branch
>            Reporter: Suresh Srinivas
>            Assignee: Suresh Srinivas
>             Fix For: Federation Branch
>
>         Attachments: HDFS-1669.patch
>
>
> Prior to federation datanode had only one namenode. In servlets hosted on datanode, a
DFSClient was created to the only namenode to serve the request. However with federation datanode
has multiple namenodes. When a request is redirected to a datanode, it does not know which
namenode to use for servicing the request.
> This results in TestHftpFileSystem failure.

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