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https://issues.apache.org/jira/browse/TEZ-1372?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14085710#comment-14085710
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Bikas Saha commented on TEZ-1372:
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Plan or action
1) Remove PreWarmContext and startPreWarmContainers. Use Vertex and submitDAG
instead. Using Vertex seems to be the only way to keep it consistent with other
changes in Vertex without replicating them in PreWarmContext.
2) Because of 1), DAG creation moves to client. DAG name can still be used to
identify pre-warm DAG.
3) The current code mentions kill prewarm dag but doesn't do it. Fix that. This
would be in the AM since it knows if the current DAG is the pre-warm DAG or not
and kill it. Alternatively, we could require users to check
TezClient.waitTillReady() before submitting the real DAG which they anyways
should be doing currently. Prefer the latter because it more consistent and
less work. Typically preWarm is used in the fallow time when the application
starts up.
> Fix preWarm to work after recent API changes
> --------------------------------------------
>
> Key: TEZ-1372
> URL: https://issues.apache.org/jira/browse/TEZ-1372
> Project: Apache Tez
> Issue Type: Sub-task
> Affects Versions: 0.5.0
> Reporter: Bikas Saha
> Assignee: Bikas Saha
> Priority: Blocker
>
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