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https://issues.apache.org/jira/browse/ZOOKEEPER-1633?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Alexander Shraer updated ZOOKEEPER-1633:
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    Summary: Introduce a protocol version to connection initiation message  
(was: Introduce a protocol version to connection initiation messaage)
    
> Introduce a protocol version to connection initiation message
> -------------------------------------------------------------
>
>                 Key: ZOOKEEPER-1633
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-1633
>             Project: ZooKeeper
>          Issue Type: Bug
>          Components: server
>            Reporter: Alexander Shraer
>            Assignee: Alexander Shraer
>             Fix For: 3.4.6
>
>
> Currently the first message a server sends to another server is just its id 
> (long). This is in QuorumCnxManager.java. This makes changes to the 
> information passed during this initial connection very difficult. This patch 
> will change the first message to be a protocol number (e.g., a negative 
> number that can't be a server id). The second message will be the number of 
> bytes in the remainder of the message. A 3.4 server will read the first long 
> as before, but if this is a negative number it will read and remove the 
> remainder of the message from the stream. This will not affect 3.4 since the 
> information sent in 3.4 is always a server id. It will provide the necessary 
> flexibility for future releases as well as an upgrade path from 3.4

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