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Date: Sun, 18 Sep 2016 08:18:20 +0000 (UTC)
From: "Varun Vasudev (JIRA)" <jira@apache.org>
To: yarn-issues@hadoop.apache.org
Message-ID: <JIRA.13004343.1473695947000.598866.1474186700606@Atlassian.JIRA>
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Subject: [jira] [Commented] (YARN-5637) Changes in NodeManager to support
 Container rollback and commit
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archived-at: Sun, 18 Sep 2016 08:18:22 -0000


    [ https://issues.apache.org/jira/browse/YARN-5637?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15500546#comment-15500546 ] 

Varun Vasudev commented on YARN-5637:
-------------------------------------

Thanks for the patch [~asuresh]! My apologies for the delay in responding. The patch looks mostly good to me. The only question I have to around deleting resources as part of the rollback. Let's say you download a new jar as part of the upgrade. When you do a rollback, this jar will be part of the classpath and this could result in the rollback failing(due to class/function not found issues). Is my understanding wrong?

I wouldn't hold up the patch for fixing this - we should probably do it in a different JIRA.

> Changes in NodeManager to support Container rollback and commit
> ---------------------------------------------------------------
>
>                 Key: YARN-5637
>                 URL: https://issues.apache.org/jira/browse/YARN-5637
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>            Reporter: Arun Suresh
>            Assignee: Arun Suresh
>         Attachments: YARN-5637.001.patch, YARN-5637.002.patch, YARN-5637.003.patch, YARN-5637.004.patch, YARN-5637.005.patch, YARN-5637.006.patch, YARN-5637.007.patch
>
>
> YARN-5620 added support for re-initialization of Containers using a new launch Context.
> This JIRA proposes to use the above feature to support upgrade and subsequent rollback or commit of the upgrade.


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