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From N Keywal <nkey...@gmail.com>
Subject Re: getting the server version from a java client
Date Mon, 30 Jan 2012 21:32:25 GMT
Let's start with the JIRA ;-)
It's ZOOKEEPER-1381

On Mon, Jan 30, 2012 at 10:03 PM, Mahadev Konar <mahadev@hortonworks.com>wrote:

> Yes please. Prefer a patch with it :) but again thats not necessary!
>
>
> On Mon, Jan 30, 2012 at 12:36 PM, N Keywal <nkeywal@gmail.com> wrote:
> > Hi,
> >
> > Thanks for your answers. The workaround is quite smart (thanks again!),
> but
> > on the long term, I would definitively prefer a simple API call. It would
> > be less environment dependent as well.
> >
> > Do you want me to create a JIRA for it?
> >
> > Cheers,
> >
> > N.
> >
> > On Mon, Jan 30, 2012 at 7:12 PM, Patrick Hunt <phunt@apache.org> wrote:
> >
> >> +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/
> >>
>
>
>
> --
> Mahadev Konar
> Hortonworks Inc.
> http://hortonworks.com/
>

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