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From "Todd Lipcon (Updated) (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-2612) HA: handle refreshNameNodes in federated HA clusters
Date Wed, 30 Nov 2011 23:29:41 GMT

     [ https://issues.apache.org/jira/browse/HDFS-2612?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Todd Lipcon updated HDFS-2612:

    Attachment: hdfs-2612.txt

Attached patch applies on top of HDFS-1971. I broke out BlockPoolManager to a new file so
I could easily add true unit tests against mocks. I ran all of the tests that call refreshNameNodes
or call MiniDFSCluster.addNameNode, and they passed.

I elected not to support changing the set of NNs within a namespace - you can only add or
remove namespaces. Converting a namespace from non-HA to HA will require a restart. But I
think that's fine for a first implementation, and we can always add that feature later if
need be.
> HA: handle refreshNameNodes in federated HA clusters
> ----------------------------------------------------
>                 Key: HDFS-2612
>                 URL: https://issues.apache.org/jira/browse/HDFS-2612
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: data-node, ha
>    Affects Versions: HA branch (HDFS-1623)
>            Reporter: Todd Lipcon
>            Assignee: Todd Lipcon
>         Attachments: hdfs-2612.txt
> For expediency in HDFS-1971 we've commented out the {{refreshNameNodes}} function temporarily
on branch. Need to fix that code to handle refresh with HA.

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