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https://issues.apache.org/jira/browse/HDFS-2679?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Todd Lipcon resolved HDFS-2679.
-------------------------------
Resolution: Fixed
Fix Version/s: HA branch (HDFS-1623)
Hadoop Flags: Reviewed
> 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
> Fix For: HA branch (HDFS-1623)
>
> Attachments: hdfs-2679.txt, hdfs-2679.txt, hdfs-2679.txt,
> hdfs-2679.txt, 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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