[jira] [Created] (ZOOKEEPER-1633) Introduce a protocol version to connection initiation messaage

["Alexander Shraer (JIRA)" <ji...@apache.org>]

Alexander Shraer created ZOOKEEPER-1633:
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             Summary: Introduce a protocol version to connection initiation messaage
                 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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