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From "Michael K. Edwards (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ZOOKEEPER-2504) Enforce that server ids are unique in a cluster
Date Thu, 22 Nov 2018 02:39:00 GMT

    [ https://issues.apache.org/jira/browse/ZOOKEEPER-2504?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16695499#comment-16695499
] 

Michael K. Edwards commented on ZOOKEEPER-2504:
-----------------------------------------------

Is this something we can address for 3.5.5?

> Enforce that server ids are unique in a cluster
> -----------------------------------------------
>
>                 Key: ZOOKEEPER-2504
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-2504
>             Project: ZooKeeper
>          Issue Type: Bug
>            Reporter: Dan Benediktson
>            Assignee: Michael Han
>            Priority: Major
>         Attachments: ZOOKEEPER-2504.patch
>
>
> The leader will happily accept connections from learners that have the same server id
(i.e., due to misconfiguration). This can lead to various issues including non-unique session_ids
being generated by these servers.
> The leader can enforce that all learners come in with unique server IDs; if a learner
attempts to connect with an id that is already in use, it should be denied.



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