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From "Eric Newton (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ACCUMULO-1572) single node zookeeper failure kills connected accumulo servers
Date Fri, 30 Aug 2013 14:59:52 GMT

    [ https://issues.apache.org/jira/browse/ACCUMULO-1572?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13754760#comment-13754760
] 

Eric Newton commented on ACCUMULO-1572:
---------------------------------------

[~kturner] I don't know why the change wasn't applied to the 1.4 branch.

>From observation, it looks like the loggers still go down when a zookeeper node goes down,
even with this fix.  The other servers stay up if they are able to reconnect in a timely fashion.

So this is still not fixed in 1.4.


                
> single node zookeeper failure kills connected accumulo servers
> --------------------------------------------------------------
>
>                 Key: ACCUMULO-1572
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-1572
>             Project: Accumulo
>          Issue Type: Bug
>          Components: master, tserver
>    Affects Versions: 1.5.0
>            Reporter: Eric Newton
>            Assignee: Eric Newton
>            Priority: Blocker
>             Fix For: 1.4.5, 1.5.1, 1.6.0
>
>
> Drew Thornton writes on the user mailing list:
> {quote}
> If one zookeeper node is shutdown/fails/whatever and the rest of the ensemble stays up,
the tablet servers attached as clients to the shutdown node immediately fail. If one of the
clients happens to be the master, the cluster goes down.
> Accumulo does not seem to be failing over to the remaining zookeeper nodes, and this
causes me to restart the individual tablet servers again.
> The zookeeper ensemble is very stable and has plenty of bandwidth/memory/processing,
so taking one node down out of five doesn't crash the zookeepers, just the tablet servers...
> {quote}

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