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From daemeon reiydelle <daeme...@gmail.com>
Subject Re: Does the JobHistoryServer register itself with ZooKeeper?
Date Thu, 17 Nov 2016 02:29:24 GMT
JHS does NOT use ZK for any purpose. HA options of NM and RM do. That is
the ONLY ZK use in Hadoop.


*.......*



*Daemeon C.M. ReiydelleUSA (+1) 415.501.0198London (+44) (0) 20 8144 9872*

On Wed, Nov 16, 2016 at 4:29 PM, Benson Qiu <benson.qiu@salesforce.com>
wrote:

> Hi Ravi,
>
> Nothing gave me the impression that JHS uses ZooKeeper. I couldn't find
> anything about it on Google, so I just wanted to check with the user group.
>
> Thanks a lot for your help!
>
> Regards,
> Benson
>
> On Wed, Nov 16, 2016 at 4:26 PM, Ravi Prakash <ravihadoop@gmail.com>
> wrote:
>
>> Are you talking about the Mapreduce JobHistoryServer? I am not aware of
>> it needing Zookeeper for anything. What gave you that impression?
>>
>> On Wed, Nov 16, 2016 at 11:32 AM, Benson Qiu <benson.qiu@salesforce.com>
>> wrote:
>>
>>> I'm looking for a way to check for connectivity to the JobHistoryServer.
>>>
>>> One way I can think of is to create a Socket connection (in Java code)
>>> to the JobHistoryServer IPC port specified in mapreduce.jobhistory.addres
>>> s.
>>>
>>> If the JHS registers itself with ZooKeeper, is there a way for me to
>>> ping ZooKeeper to check the status of the JHS?
>>>
>>
>>
>

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