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From "Patrick Hunt (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ZOOKEEPER-1502) Prevent multiple zookeeper servers from using the same data directory
Date Wed, 01 Aug 2012 00:34:34 GMT

    [ https://issues.apache.org/jira/browse/ZOOKEEPER-1502?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13426244#comment-13426244

Patrick Hunt commented on ZOOKEEPER-1502:

Thanks Jacob. So java FileLock would suffice here then?
> Prevent multiple zookeeper servers from using the same data directory
> ---------------------------------------------------------------------
>                 Key: ZOOKEEPER-1502
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-1502
>             Project: ZooKeeper
>          Issue Type: Improvement
>          Components: server
>    Affects Versions: 3.4.3
>            Reporter: Will Johnson
> We recently ran into an issue where two zookeepers servers which were a part of two separate
quorums were configured to use the same data directory.  Interestingly, the zookeeper servers
did not seem to complain and both seemed to work fine until one of them was restarted.  Once
that happened all sort of chaos ensued.  I understand that this is a misconfiguration should
zookeeper complain about this or do users need to protect themselves in some external fashion?
 Is a simple file lock enough or are there other things I should take into consideration if
it’s up to me to handle?  

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