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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-8914) Document HA support in the HDFS HdfsDesign.md
Date Mon, 23 Nov 2015 01:11:11 GMT

    [ https://issues.apache.org/jira/browse/HDFS-8914?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15021311#comment-15021311
] 

Hudson commented on HDFS-8914:
------------------------------

FAILURE: Integrated in Hadoop-Mapreduce-trunk #2637 (See [https://builds.apache.org/job/Hadoop-Mapreduce-trunk/2637/])
HDFS-8914. Document HA support in the HDFS HdfsDesign.md. Contributed by (wheat9: rev 0c7340f377f6663052be097ef58d60eee25f7334)
* hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
* hadoop-hdfs-project/hadoop-hdfs/src/site/markdown/HdfsDesign.md


> 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
>            Priority: Trivial
>             Fix For: 2.8.0
>
>         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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