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From "Tsz Wo (Nicholas), SZE (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-5848) Add rolling upgrade infomation to heartbeat response
Date Thu, 30 Jan 2014 09:00:24 GMT

    [ https://issues.apache.org/jira/browse/HDFS-5848?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13886424#comment-13886424
] 

Tsz Wo (Nicholas), SZE commented on HDFS-5848:
----------------------------------------------

Sure, the latest patch added a field in HeartbeatResponse instead of adding a new DatanodeCommand.

> Add rolling upgrade infomation to heartbeat response
> ----------------------------------------------------
>
>                 Key: HDFS-5848
>                 URL: https://issues.apache.org/jira/browse/HDFS-5848
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: namenode
>            Reporter: Tsz Wo (Nicholas), SZE
>            Assignee: Tsz Wo (Nicholas), SZE
>         Attachments: h5848_20130130.patch, h5848_20130130b.patch
>
>
> When rolling upgrade is in progress, NN should inform datanodes via heartbeat responses
so that datanode should create hardlinks when deleting blocks.  We only change heartbeat response
here.  The datanode change will be done in a separated JIRA.



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