If someone could deploy a build to a public maven repository it would
really help zk client development and adoption when integrating with
external maven-ized projects, since adding such a dependency is
trivial in maven.
.. Adam
On Wed, Nov 5, 2008 at 12:28 PM, Patrick Hunt <[EMAIL PROTECTED]> wr
On Wed, Jan 7, 2009 at 12:46 PM, Kevin Burton wrote:
> On Wed, Jan 7, 2009 at 9:25 AM, Benjamin Reed wrote:
>
>> This is the behavior we had when we first implemented the API, and in every
>> case where people used the information there was a bug. it is virtually
>> impossible to use correctly. I
It feels like we need a flowchart, state-chart, or something, so we
can all talk about the same thing. Then people could suggest
abstractions that would essentially put a box around sections of the
diagram. However I feel woefully inadequate at the former :(.
.. Adam
On Thu, Jan 8, 2009 at 4:20 P
t; From: adam.ros...@gmail.com [mailto:adam.ros...@gmail.com] On Behalf Of Adam
> Rosien
> Sent: Thursday, January 08, 2009 8:06 PM
> To: zookeeper-user@hadoop.apache.org
> Subject: Re: Updated NodeWatcher...
>
> It feels like we need a flowchart, state-chart, or something, so
Re: ZOOKEEPER-80:
(I'm waiting for my password reset to the ASF JIRA so I thought I'd
comment here in the mean time...)
Maven has a nice directory layout structure that takes into account
multiple languages, e.g., src/main/java, src/main/c, etc.
I really dislike the terms recipes and contrib for
I've written a blog post about using ZooKeeper for group membership at KaChing:
http://bit.ly/6yraP6
http://eng.kaching.com/2010/01/actually-implementing-group-management.html
Any comments or feedback is welcome.
.. Adam
the design choices
> they made (which were fine, just not well documented and therefor easy for
> users to miss). In particular (again, at the time, may be addressed by now)
> watch notifications could be lost during disconnected/expired sessions, and
> the user would not be made aware
ot;) would help solve. That too can be
a black hole :(. I need more practical experience to find the right
balance.
.. Adam
On Mon, Jan 11, 2010 at 10:20 AM, Patrick Hunt wrote:
> Adam Rosien wrote:
>>
>> Re "off the shelf", my title of "Actually Implementing"
user would not be made aware of this.
>
> 3) excellent point/suggestion on the "rogue" service
>
> Patrick
>
> Adam Rosien wrote:
>>
>> I've written a blog post about using ZooKeeper for group membership at
>> KaChing:
>>
>> http://bit.ly/6yraP6
>> http://eng.kaching.com/2010/01/actually-implementing-group-management.html
>>
>> Any comments or feedback is welcome.
>>
>> .. Adam
>
I have a related question: what's the behavior of a cluster of 3 when
one is down? I've tried it and a leader is elected, but are there any
other caveats for this situation?
.. Adam
On Tue, Jan 12, 2010 at 2:40 PM, Patrick Hunt wrote:
> 12 servers? That's alot, if you dont' mind my asking why so
to keep going. In general, if fewer than half your
> nodes have failed, ZK will keep on keeping on.
>
> The main concern with a cluster of 2/3 machines is that a single further
> failure will bring down the whole cluster.
>
> Henry
>
> 2010/1/12 Adam Rosien
>
>> I
On a related note, it was initially confusing to me that the server
returned 'imok' when it wasn't part of the quorum. I realize the
internal checks are probably in separate areas of the code, but if
others feel similarly I could file an improvement in JIRA.
.. Adam
On Wed, Jan 13, 2010 at 11:19
ying the servers werent able to elect a leader?
>
> mahadev
>
>
> On 1/13/10 11:52 AM, "Adam Rosien" wrote:
>
>> On a related note, it was initially confusing to me that the server
>> returned 'imok' when it wasn't part of the quorum. I re
http://hadoop.apache.org/zookeeper/docs/r3.3.0/recipes.html#sc_recoverableSharedLocks
uses the heading "recoverable" locks, but the text refers to
"revocable".
.. Adam
of issue. Thanks!
> https://issues.apache.org/jira/browse/ZOOKEEPER
>
> Patrick
>
> On 04/22/2010 11:30 AM, Adam Rosien wrote:
>>
>>
>> http://hadoop.apache.org/zookeeper/docs/r3.3.0/recipes.html#sc_recoverableSharedLocks
>> uses the heading "recoverable" locks, but the text refers to
>> "revocable".
>>
>> .. Adam
>
I got in actually. I'll file the issue. Grr.
On Thu, Apr 22, 2010 at 1:26 PM, Adam Rosien wrote:
> I would, but the Apache JIRA has been f***ed since the breakin and I
> can't reset my password. Would you mind adding it for me?
>
> .. Adam
>
> On Thu, Apr 22, 20
Created https://issues.apache.org/jira/browse/ZOOKEEPER-751
On Thu, Apr 22, 2010 at 1:33 PM, Adam Rosien wrote:
> I got in actually. I'll file the issue. Grr.
>
> On Thu, Apr 22, 2010 at 1:26 PM, Adam Rosien wrote:
>> I would, but the Apache JIRA has been f***ed since the br
gt; On 4/22/10 1:37 PM, "Patrick Hunt" wrote:
>
>> No problem.
>> https://issues.apache.org/jira/browse/ZOOKEEPER-752
>>
>> I've seen alot of traffic on infrastruct...@apache, you might try there,
>> I'm sure they could help you out.
>>
>
My sequence number is lower. Do I win? :)
On Thu, Apr 22, 2010 at 4:44 PM, Adam Rosien wrote:
> Good one! I'm the only one in my office who regularly makes zk jokes.
>
> On Thu, Apr 22, 2010 at 1:40 PM, Mahadev Konar wrote:
>> I think we should be using zookeeper l
I use zkclient in my work at kaChing and I have mixed feelings about
it. On one hand it makes "easy things easy" which is great, but on the
other hand I very few ideas what assumptions it makes "under the
hood". I also dislike some of the design choices such as unchecked
exceptions, but that's neit
rt of well documented contrib module which lays out the
> assumptions/design of it. It could very well be useful for others. Its just
> that folks havent had much time to focus on these areas as yet.
>
> Thanks
> mahadev
>
>
> On 5/4/10 2:58 PM, "Adam Rosien" wrot
Hi Abmar, cool project!
I wrote an implementation of the Phi Accrual Detector which I would be
happy to donate. It has the nice property that its parameters are
based on expectation odds rather than something more arbitrary like #
retries.
You can steal it at http://github.com/arosien/failure. It
I use it at my job at kaChing. Generally it is just fine for the job,
doing what you'd expect.
My criticisms are that it is very thin on documentation (javadoc),
which may have been improved, and I don't like how it makes every zk
exception into a RuntimeException.
But I'm thumbs up.
.. Adam
On
Thomas -
I like the ideas of your proposal, it seems very natural to use
Callable/Future for zk operations rather than something with more
opaque semantics (does this method block? etc.). Let's discuss this
more, I'd be more than happy to help out.
We're still using 3.2.1 so I'll probably have to
What happens during a network partition and different clients are
incrementing "different" counters, and then the partition goes away?
Won't (potentially) the same sequence value be given out to two
clients?
.. Adam
On Thu, Aug 5, 2010 at 5:38 PM, Jonathan Holloway
wrote:
> Hi Ted,
>
> Thanks fo
appen.
>
> In a network partition, the side without a quorum can't update the file
> version.
>
> On Wed, Aug 11, 2010 at 3:11 PM, Adam Rosien wrote:
>
>> What happens during a network partition and different clients are
>> incrementing "different" counter
http://hadoop.apache.org/zookeeper/docs/r3.3.1/zookeeperAdmin.html#sc_dataFileManagement
says that one can copy the contents of the data directory and use it
on another machine. The example states the other instance is not in
the server list; what would happen if one did copy it to an offline
membe
Uhh, I'm not sure what you mean, but if anyone's curious I wrote the
system that we use at kaChing to do continuous deployment with zk as
the discovery and coordination layers, and I'd be happy to talk about
how it works, etc. Pretty basic stuff.
BTW it's Pascal-Louis Perez, CTO of kaChing.
.. Ad
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