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From "Josh Elser (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ACCUMULO-2918) TServers expect zookeeper to have parent nodes created
Date Wed, 18 Jun 2014 18:20:25 GMT

    [ https://issues.apache.org/jira/browse/ACCUMULO-2918?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14036084#comment-14036084
] 

Josh Elser commented on ACCUMULO-2918:
--------------------------------------

bq.  In this case if someone accidentally starts a 1.7.0 tablet server on a 1.6.0 cluster,
it may add this node in zookeeper?

Correct. The master also does the same check because it expects them to exist (when replication
is enabled). The overhead would be 3 unnecessary zk nodes (one parent with two children) that
are empty.

> TServers expect zookeeper to have parent nodes created
> ------------------------------------------------------
>
>                 Key: ACCUMULO-2918
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-2918
>             Project: Accumulo
>          Issue Type: Bug
>          Components: replication
>         Environment: starting up 1.7.0 after replication was commited
>            Reporter: Eric Newton
>            Assignee: Josh Elser
>             Fix For: 1.7.0
>
>
> replication needs some upgrade code to make some nodes in zookeeper
> Here's the error message:
> {noformat}
> KeeperErrorCode = NoNode for /accumulo/2f3173c3-c02f-4e3a-b01c-7f721d4a9f00/replication/tservers/host:9997
> {noformat}



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