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From "Alexander Shraer (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ZOOKEEPER-1790) Deal with special ObserverId in QuorumCnxManager.receiveConnection
Date Sat, 02 Nov 2013 17:21:18 GMT

    [ https://issues.apache.org/jira/browse/ZOOKEEPER-1790?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13812078#comment-13812078

Alexander Shraer commented on ZOOKEEPER-1790:

The problem described in this JIRA turned out not be a problem as I mention in the first comment.

[~thawan], I'm actually not sure if -1 would work or not - there aren't any tests for this
in 3.4 or 3.5. I can't think of anything specific 
that changed that would prevent it from working, but I may be wrong. As you pointed out you
wouldn't be able to dynamically change
the parameters of such observers.

> Deal with special ObserverId in QuorumCnxManager.receiveConnection
> ------------------------------------------------------------------
>                 Key: ZOOKEEPER-1790
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-1790
>             Project: ZooKeeper
>          Issue Type: Bug
>          Components: server
>    Affects Versions: 3.4.6, 3.5.0
>            Reporter: Alexander Shraer
>            Assignee: Alexander Shraer
>             Fix For: 3.4.6, 3.5.0
> QuorumCnxManager.receiveConnection assumes that a negative sid means that this is a 3.5.0
server, which has a different communication protocol. This doesn't account for the fact that
ObserverId = -1 is a special id that may be used by observers and is also negative. 
> This requires a fix to trunk and a separate fix to 3.4 branch, where this function is
different (see ZOOKEEPER-1633)

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