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From "Todd Lipcon (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-1623) High Availability Framework for HDFS NN
Date Mon, 25 Jul 2011 16:00:14 GMT

    [ https://issues.apache.org/jira/browse/HDFS-1623?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13070567#comment-13070567
] 

Todd Lipcon commented on HDFS-1623:
-----------------------------------

Yang: the delivery of the "disconnected" event from ZK is asynchronous. So, there is a small
window of time when the old NN still "thinks" it owns the znode while the new node may have
taken over.

> High Availability Framework for HDFS NN
> ---------------------------------------
>
>                 Key: HDFS-1623
>                 URL: https://issues.apache.org/jira/browse/HDFS-1623
>             Project: Hadoop HDFS
>          Issue Type: New Feature
>            Reporter: Sanjay Radia
>            Assignee: Sanjay Radia
>         Attachments: HDFS-High-Availability.pdf, NameNode HA_v2.pdf, NameNode HA_v2_1.pdf,
Namenode HA Framework.pdf
>
>


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