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From Patrick Hunt <ph...@apache.org>
Subject Re: getting the server version from a java client
Date Mon, 30 Jan 2012 18:12:27 GMT
+1, that would be a good api addition.

On Mon, Jan 30, 2012 at 10:10 AM, Mahadev Konar <mahadev@hortonworks.com> wrote:
> Keywal,
>  Right now there isnt anyway for the client to tell which version of
> server its talking to. You can probably hack something around the stat
> command:
>
> echo stat | nc hostname clientport to get the version, but other than
> that we dont have such an api. I think its probably worth having such
> an api implemented.
>
> Here is the output of stat on my laptop:
>
> -----------------------
> 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
> --------------------
>
> thanks
> mahadev
>
> On Mon, Jan 30, 2012 at 1:04 AM, N Keywal <nkeywal@gmail.com> wrote:
>> Hello,
>>
>> What's the recommended way for a client to get the version of the server
>> it's connected to?
>>
>> I would like to write a (java) client that uses the "multi" function
>> available since 3.4.x, with a fall-back implementation if the server is a
>> 3.3. Or at the very least to check that the server is a 3.4+ before using
>> "multi".
>>
>> I looked at the java client API but I didn't find a way to get this info.
>>
>> When the client uses "multi" when connected to a 3.3 server, it hangs (I
>> was hoping for something like KeeperException.UnimplementedException, but
>> it's not the case).
>>
>> Thanks in advance for your help,
>>
>> N.
>
>
>
> --
> Mahadev Konar
> Hortonworks Inc.
> http://hortonworks.com/

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