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https://issues.apache.org/jira/browse/HDFS-8914?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Vinod Kumar Vavilapalli resolved HDFS-8914.
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Resolution: Fixed
Closing this again.
> Document HA support in the HDFS HdfsDesign.md
> ---------------------------------------------
>
> Key: HDFS-8914
> URL: https://issues.apache.org/jira/browse/HDFS-8914
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: documentation
> Affects Versions: 2.7.1
> Environment: Documentation page in live
> Reporter: Ravindra Babu
> Assignee: Lars Francke
> Fix For: 2.8.0, 2.7.3
>
> Attachments: HDFS-8914.1.patch, HDFS-8914.2.patch
>
>
> Please refer to these two links and correct one of them.
> http://hadoop.apache.org/docs/r2.7.1/hadoop-project-dist/hadoop-hdfs/HdfsDesign.html
> The NameNode machine is a single point of failure for an HDFS cluster. If the
> NameNode machine fails, manual intervention is necessary. Currently,
> automatic restart and failover of the NameNode software to another machine is
> not supported.
> http://hadoop.apache.org/docs/r2.7.1/hadoop-project-dist/hadoop-hdfs/HDFSHighAvailabilityWithQJM.html
> The HDFS High Availability feature addresses the above problems by providing
> the option of running two redundant NameNodes in the same cluster in an
> Active/Passive configuration with a hot standby. This allows a fast failover
> to a new NameNode in the case that a machine crashes, or a graceful
> administrator-initiated failover for the purpose of planned maintenance.
> Please update hdfsDesign article with same facts to avoid confusion in
> Reader's mind..
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