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From "Harsh J (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-402) Display the server version in dfsadmin -report
Date Sun, 01 Jan 2012 05:02:31 GMT

    [ https://issues.apache.org/jira/browse/HDFS-402?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13178119#comment-13178119
] 

Harsh J commented on HDFS-402:
------------------------------

-1 on that patch, its not the 'required' fix for this JIRA.

An easy misleader with that would be that the client running report will print 0.23.1 while
the real server version may just be 0.23.0. This is not what is required.

But FWIW, version is present in the web UI and in metrics today. ("name" : "hadoop:service=NameNode,name=NameNodeInfo"
carries a 'Version' param.)

Also, if the client is incompatible, a better message is thrown (in 0.23+) indicating the
protocol version differences (not version string, however).
                
> Display the server version in dfsadmin -report
> ----------------------------------------------
>
>                 Key: HDFS-402
>                 URL: https://issues.apache.org/jira/browse/HDFS-402
>             Project: Hadoop HDFS
>          Issue Type: Wish
>            Reporter: Jakob Homan
>            Priority: Minor
>              Labels: newbie
>         Attachments: HDFS-402.patch
>
>
> As part of HADOOP-5094, it was requested to include the server version in the dfsadmin
-report, to avoid the need to screen scrape to get this information:
> bq. Please do provide the server version, so there is a quick and non-taxing way of determine
what is the current running version on the namenode.
> Currently there is nothing in the dfs client protocol to query this information.

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