[
https://issues.apache.org/jira/browse/ZOOKEEPER-1381?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13399453#comment-13399453
]
nkeywal commented on ZOOKEEPER-1381:
------------------------------------
bq. What do you think? Wouldn't that be sufficient for what you've described?
Yep, it's my comment from the 13/Jun/12 09:48, with a reproduction scenario on
'multi'. Instead of just logging (code: "LOG.warn("Dropping packet at server of
type " + si.type);"), the ZK server could raise an error to the client. As it
makes the error easy to analyze from the client application administrator point
of view, so it's an acceptable long term solution.
I don't mind implementing this (in a separate jira then), I'm unclear today on
what I should modify exactly, I will have a look at it and come back with
questions if necessary.
> Add a method to get the zookeeper server version from the client
> ----------------------------------------------------------------
>
> Key: ZOOKEEPER-1381
> URL: https://issues.apache.org/jira/browse/ZOOKEEPER-1381
> Project: ZooKeeper
> Issue Type: Improvement
> Components: c client, documentation, java client, server
> Affects Versions: 3.4.2
> Environment: all
> Reporter: nkeywal
> Priority: Minor
> Labels: newbie
>
> Zookeeper client API is designed to be server version agnostic as much as
> possible, so we can have new clients with old servers (or the opposite). But
> there is today no simple way for a client to know what's the server version.
> This would be very useful in order to;
> - check the compatibility (ex: 'multi' implementation available since 3.4
> while 3.4 clients API supports 3.3 servers as well)
> - have different implementation depending on the server functionalities
> A workaround (proposed by Mahadev Konar) is do "echo stat | nc hostname
> clientport" and parse the output to get the version. The output is, for
> example:
> -----------------------
> Zookeeper version: 3.4.2--1, built on 01/30/2012 17:43 GMT
> Clients:
> /127.0.0.1:54951[0](queued=0,recved=1,sent=0)
> Latency min/avg/max: 0/0/0
> Received: 1
> Sent: 0
> Outstanding: 0
> Zxid: 0x500000001
> Mode: follower
> Node count: 7
> --------------------
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators:
https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira
