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From Mithun Mathew <mithm...@gmail.com>
Subject Re: Does Start All follow the service order ?
Date Thu, 31 Mar 2016 02:05:34 GMT
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/

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