[jira] [Commented] (TEZ-550) Allow re-launching the child JVM in between dags

["Bikas Saha (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/TEZ-550?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13792094#comment-13792094 ] 

Bikas Saha commented on TEZ-550:
--------------------------------

Options
1) have a different child jvm that launches the real JVM and can kill and re-launch based on AM commands. This works independent of pre-warm.
2) if pre-warm is enabled, then we could release all existing containers and run the pre-warm logic again.

> Allow re-launching the child JVM in between dags
> ------------------------------------------------
>
>                 Key: TEZ-550
>                 URL: https://issues.apache.org/jira/browse/TEZ-550
>             Project: Apache Tez
>          Issue Type: Sub-task
>            Reporter: Bikas Saha
>
> Child JVM may leak memory or threads or statics etc. So it may make sense to use the idle time between dags to re-launch the JVMs.



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