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Posted to notifications@accumulo.apache.org by "Keith Turner (JIRA)" <ji...@apache.org> on 2014/01/22 21:37:20 UTC
[jira] [Commented] (ACCUMULO-1832) Create utility for rewriting
uris
[ https://issues.apache.org/jira/browse/ACCUMULO-1832?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13879154#comment-13879154 ]
Keith Turner commented on ACCUMULO-1832:
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I was thinking about how user might use the new HA namenode w/ 1.6. and another use case for this utility occurred to me. The following scenario seems like a possibility.
# User sets up single namnode w/ address http://<dns address>:<port>
# User runs Accumulo 1.6.0 using this namenode.
# User replaces single namenode w/ HA namenode w/ address http://<nameservice id>
# User replaces all instances of http://<dns address>:<port> in Accumulo metadata with http://<nameservice id>
It would be nice if all users just started off w/ HA namenodes, but I suspect the above may not be uncommon. If the user does not do step 4 and things just happen to still work, then they may not find out they need to do it until a namenode failure occurs.
> 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
> Assignee: Eric Newton
> 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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