[jira] [Assigned] (TEZ-4170) RootInputInitializerManager could make use of ThreadPool from appContext

["Attila Magyar (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/TEZ-4170?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Attila Magyar reassigned TEZ-4170:
----------------------------------

    Assignee: Attila Magyar

> RootInputInitializerManager could make use of ThreadPool from appContext
> ------------------------------------------------------------------------
>
>                 Key: TEZ-4170
>                 URL: https://issues.apache.org/jira/browse/TEZ-4170
>             Project: Apache Tez
>          Issue Type: Improvement
>            Reporter: Rajesh Balamohan
>            Assignee: Attila Magyar
>            Priority: Major
>         Attachments: Screenshot 2020-05-06 at 6.26.34 AM.png
>
>
> [https://github.com/apache/tez/blob/master/tez-dag/src/main/java/org/apache/tez/dag/app/dag/RootInputInitializerManager.java#L106]
>  
> This could make use of executor from {{appContext}} instead of spinning one for every root input.
>  
> Also, initialization part of InputInitializer could be moved inside this thread. For e.g, in certain cases like HiveSplitGenerator, it ends up with some heavy operations which can be offloaded from blocking central dispatcher thread (e.g unpacking payloads, running kryo deserialization)
>  
> !Screenshot 2020-05-06 at 6.26.34 AM.png|width=972,height=740!
>  
>  



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