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From "Sean Busbey (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ACCUMULO-1771) Instance id and version info only stored on one hdfs instance
Date Wed, 18 Dec 2013 21:46:07 GMT

    [ https://issues.apache.org/jira/browse/ACCUMULO-1771?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13852192#comment-13852192
] 

Sean Busbey commented on ACCUMULO-1771:
---------------------------------------

[~kturner], I believe Mike is talking about the [HDFS Federation built into Hadoop|http://hadoop.apache.org/docs/r2.2.0/hadoop-project-dist/hadoop-hdfs/Federation.html]

Under that, I believe only a single NameNode would be responsible for the part of the namespace
that defines the instance id and version information.

> Instance id and version info only stored on one hdfs instance
> -------------------------------------------------------------
>
>                 Key: ACCUMULO-1771
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-1771
>             Project: Accumulo
>          Issue Type: Sub-task
>          Components: master, tserver
>            Reporter: Keith Turner
>            Priority: Critical
>             Fix For: 1.6.0
>
>
> When instance.volumes contains multiple uris only the first one is initialized with the
data version and instance id.   If the user changes the order of the uris in the config, it
seems like Accumulo will stop working correctly.



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