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From "Keith Turner (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ACCUMULO-1832) Create utility for rewriting uris
Date Sat, 02 Nov 2013 17:03:18 GMT

    [ https://issues.apache.org/jira/browse/ACCUMULO-1832?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13812071#comment-13812071
] 

Keith Turner commented on ACCUMULO-1832:
----------------------------------------

The changes made in ACCUMULO-118 make Accumulo use fully qualified urls all the time.  It
does not matter multiple namenodes are being used.   If your namenode fails and you bring
back up another node, then Accumulo will not work.  W/o this utility, it seems like the only
easy option for a user would be to change DNS to point to the new node.  In some cases a different
set of administrators will control DNS, so this slows down recovering a system. Before this
change an admin could change the Hadoop or Accumulo config to point to the new namenode and
push the configs out. 

> Create utility for rewriting uris
> ---------------------------------
>
>                 Key: ACCUMULO-1832
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-1832
>             Project: Accumulo
>          Issue Type: Sub-task
>          Components: master, tserver
>            Reporter: Keith Turner
>            Priority: Blocker
>             Fix For: 1.6.0
>
>
> When a users namenode dies and they restore it on another node Accumulo will not work
since it stores fully qualified uris internally.  Need to a provide a utility to rewrite these
URIs.
> The utility  could rewrite paths in zookeeper, bring root table online and rewrite paths,
bring metadata table online and rewrite, and then allow user tablets to come online.



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