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From Mithun Mathew <mithm...@gmail.com>
Subject Re: Does Start All follow the service order ?
Date Thu, 31 Mar 2016 04:28:10 GMT
This means that the service (we'll call it serviceX) cannot be installed
without YARN.

I guess requiredServices is responsible for this behavior:
On the Add Service page, un-check all services. Check serviceX and click
Next - This would complain YARN has to be checked too, if it has not
already been installed.

On Wed, Mar 30, 2016 at 7:08 PM, Jeff Zhang <zjffdu@gmail.com> wrote:

> Thanks Mithun,  I thought the order was specified in metainfo.xml as
> following
>
> <requiredServices>
>   <service>YARN</service>
> </requiredServices>
>
>
>
>
> On Thu, Mar 31, 2016 at 10:05 AM, Mithun Mathew <mithmatt@gmail.com>
> wrote:
>
>> To my understanding, Start All Services would start the individual
>> components according to the dependencies mentioned in
>> role_command_order.json
>> You can find this file under every stack. Here's the role_command_order.json
>> for HDP 2.3
>> <https://github.com/apache/ambari/blob/trunk/ambari-server/src/main/resources/stacks/HDP/2.3/role_command_order.json>
>>
>> If you want to force a start order for the component, you might have to
>> look into adding an entry to the above file for that stack.
>>
>> Also note that if a service is already started state, Start All Services
>> would not restart it (at least this was how it was, the last time I
>> checked).
>>
>> On Wed, Mar 30, 2016 at 6:43 PM, Jeff Zhang <zjffdu@gmail.com> wrote:
>>
>>>
>>> Here's the service starting order I see when I click Start All:
>>>
>>> Spark actually depends on Hive/Yarn/HDFS, but it's strange that I
>>> NodeManager/HiveServer2 start after Spark HistoryServer and there's no
>>> NameNode/DataNode start.
>>>
>>>
>>>  YARN Client Install <http://localhost:8080/#>
>>>  ZooKeeper Client Install <http://localhost:8080/#>
>>>  Atlas Metadata Server Start <http://localhost:8080/#>
>>>  MySQL Server Start <http://localhost:8080/#>
>>>  Ranger Admin Start <http://localhost:8080/#>
>>>  Zeppelin Notebook Start <http://localhost:8080/#>
>>>  Ranger Usersync Start <http://localhost:8080/#>
>>>  App Timeline Server Start <http://localhost:8080/#>
>>>  History Server Start <http://localhost:8080/#>
>>>  Hive Metastore Start <http://localhost:8080/#>
>>>  ResourceManager Start <http://localhost:8080/#>
>>>  Spark History Server Start <http://localhost:8080/#>
>>>  ZooKeeper Server Start <http://localhost:8080/#>
>>>  NodeManager Start <http://localhost:8080/#>
>>>  HiveServer2 Start <http://localhost:8080/#>
>>>  Oozie Server Start <http://localhost:8080/#>
>>>  Flume Start <http://localhost:8080/#>
>>>  WebHCat Server Start <http://localhost:8080/#>
>>>
>>> --
>>> Best Regards
>>>
>>> Jeff Zhang
>>>
>>
>>
>>
>> --
>> *Mithun Mathew* (Matt)
>>
>>    - www.linkedin.com/in/mithunmatt/
>>
>>
>
>
> --
> Best Regards
>
> Jeff Zhang
>



-- 
*Mithun Mathew* (Matt)

   - www.linkedin.com/in/mithunmatt/

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