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From "Eli Collins (Updated) (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-2679) Add interface to query current state to HAServiceProtocol
Date Wed, 14 Dec 2011 07:10:31 GMT

     [ https://issues.apache.org/jira/browse/HDFS-2679?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Eli Collins updated HDFS-2679:
------------------------------

    Attachment: hdfs-2679.txt

Patch attached.
                
> Add interface to query current state to HAServiceProtocol 
> ----------------------------------------------------------
>
>                 Key: HDFS-2679
>                 URL: https://issues.apache.org/jira/browse/HDFS-2679
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>    Affects Versions: HA branch (HDFS-1623)
>            Reporter: Eli Collins
>            Assignee: Eli Collins
>         Attachments: hdfs-2679.txt
>
>
> Let's add an interface to HAServiceProtocol to query the current state of a NameNode
for use by the the CLI (HAAdmin) and Web UI (HDFS-2677). This essentially makes the names
"active" and "standby" from ACTIVE_STATE and STANDBY_STATE public interfaces, which IMO seems
reasonable. Unlike the other APIs we should be able to use the interface even when HA is not
enabled (as by default a non-HA NN is active).

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