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Date: Fri, 6 Jan 2012 15:18:39 +0000 (UTC)
From: "Robert Joseph Evans (Commented) (JIRA)" <jira@apache.org>
To: hdfs-issues@hadoop.apache.org
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Subject: [jira] [Commented] (HDFS-2760) HDFS notification
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    [ https://issues.apache.org/jira/browse/HDFS-2760?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13181382#comment-13181382 ] 

Robert Joseph Evans commented on HDFS-2760:
-------------------------------------------

We are looking at adding in SubPub notification support to HADOOP.  To MapReduce for job end notification, and to HDFS for these types of events. The work is still very preliminary HADOOP-7821, but I think this is a duplicate of HDFS-1742, which is a subtask of HADOOP-7821 to add in these type of events.  If HADOOP-1742 would fit your needs then please dupe this JIRA to it. 
                
> HDFS notification 
> ------------------
>
>                 Key: HDFS-2760
>                 URL: https://issues.apache.org/jira/browse/HDFS-2760
>             Project: Hadoop HDFS
>          Issue Type: New Feature
>    Affects Versions: 0.20.2
>            Reporter: Denny Ye
>            Priority: Minor
>              Labels: HDFS
>
> Client would like to receive the interested namespace operation at HDFS, likes 'rename', 'block allocation' and so on. NameNode should support the changing notification to client with appropriate way. 
> In my opinion, I suggest the notification should be applied between NameNode RPC server and actual NameNode object (it's proxy for NameNode object).

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