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From chao chu <chuchao...@gmail.com>
Subject Re: Real world usage of the recipe LeaderLatch
Date Wed, 26 Jun 2013 15:56:45 GMT
Thanks, I will take a look at it.


On Wed, Jun 26, 2013 at 11:52 PM, Eric Tschetter <echeddar@gmail.com> wrote:

> ChuChao,
>
> We use it in the Druid project (http://www.github.com/metamx/druid/)
>
> You can see its use in the class com.metamx.druid.master.DruidMaster
>
> The class has a bunch of other stuff in it as well that is not specific to
> the LeaderLatch, but you can just ignore that and see how it handles the
> latch.
>
> --Eric
>
>
> On Wednesday, June 26, 2013, chao chu wrote:
>
>> Thanks a lot for your reply. Could you please name a few open source
>> projects that used LeaderLatch if you are aware of any? I'd like to take a
>> look at the code.
>>
>> btw, What about issues reported in the links I mentioned? are they actual
>> bugs or just used in an unexpected way?
>>
>>
>>
>> On Wed, Jun 26, 2013 at 7:29 AM, Jordan Zimmerman <
>> jordan@jordanzimmerman.com> wrote:
>>
>>> Curator is being used at major companies (i.e. Netflix, eBay, etc.).
>>> Bugs are quickly fixed when reported. In particular, LeaderLatch is widely
>>> used.
>>>
>>> -JZ
>>>
>>>
>>> On Jun 25, 2013, at 11:03 AM, chao chu <chuchao333@gmail.com> wrote:
>>>
>>> Hi,
>>>
>>> I have been trying to use the LeaderLatch to implement Leader Election
>>> in my project and had written some scripts to simulate the situations when
>>> the zk ensemble become unstable due to network problems. It worked well and
>>> as expected so far.
>>>
>>> However, by digging into both zookeeper-users and curator-users mailing
>>> lists, there are indeed some bugs/edge cases reported, like
>>> LeaderLatch bug causing extra znodes appearing in Zookeeper<https://groups.google.com/forum/?fromgroups#!searchin/curator-users/LeaderLatch/curator-users/to8ViZp6p-E/xYbKbzqkZQYJ>
>>>  and multiple participants thought they are leader<https://listserv.netflix.com/pipermail/curator-users/2012-October/000201.html>
which
>>> worried me about the reliability of this.
>>>
>>> So, my question is that: are there any real world projects are using
>>> this recipe which have proved the quality of it, or are there any other
>>> known edge cases or open issues?
>>>
>>>
>>> Thanks & Regards,
>>>
>>> --
>>> ChuChao
>>>
>>>
>>>
>>
>>
>> --
>> ChuChao
>>
>


-- 
ChuChao

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