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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-1914) HDFS should have a NamenodeProtocol to allow secondary namenodes and rebalancing processes to communicate with a primary namenode
Date Mon, 01 Oct 2007 20:39:50 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-1914?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12531627
] 

Hadoop QA commented on HADOOP-1914:
-----------------------------------

-1 overall.  Here are the results of testing the latest attachment 
http://issues.apache.org/jira/secure/attachment/12366861/namenodeProtocol2.patch
against trunk revision r581028.

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

    javadoc -1.  The javadoc tool appears to have generated  messages.

    javac +1.  The applied patch does not generate any new compiler warnings.

    findbugs +1.  The patch does not introduce any new Findbugs warnings.

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

    contrib tests -1.  The patch failed contrib unit tests.

Test results: http://lucene.zones.apache.org:8080/hudson/job/Hadoop-Patch/859/testReport/
Findbugs warnings: http://lucene.zones.apache.org:8080/hudson/job/Hadoop-Patch/859/artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Checkstyle results: http://lucene.zones.apache.org:8080/hudson/job/Hadoop-Patch/859/artifact/trunk/build/test/checkstyle-errors.html
Console output: http://lucene.zones.apache.org:8080/hudson/job/Hadoop-Patch/859/console

This message is automatically generated.

> HDFS should have a NamenodeProtocol to allow  secondary namenodes and rebalancing processes
to communicate with a primary namenode
> ----------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: HADOOP-1914
>                 URL: https://issues.apache.org/jira/browse/HADOOP-1914
>             Project: Hadoop
>          Issue Type: New Feature
>          Components: dfs
>    Affects Versions: 0.14.1
>            Reporter: Hairong Kuang
>            Assignee: Hairong Kuang
>             Fix For: 0.15.0
>
>         Attachments: namenodeProtocol.patch, namenodeProtocol1.patch, namenodeProtocol2.patch
>
>
> For the security purpose, it is nice to have a NamenodeProtocol to allow secondary namenodes
and rebalacing processes to communicate with a primary namenode. In the first version the
NamenodeProtocol is going to support one RPC:
>    BlockLocations[] getBlocks(DatanodeID datanode, long size);
> This RPC allows a rebalancing process to fetch a partial blocks map from a namenode.
It returns a list of blocks on the given datanode and its locations, whose total size is the
given size.

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