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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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Description: 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 server id.
The third message is 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 the second long to find the server id, and then 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 (was: 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)
> 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 server id.
> The third message is 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 the second long to find the server id, and then 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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