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From "Zhijie Shen (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (YARN-2879) Compatibility validation between YARN 2.2/2.4 and 2.6
Date Fri, 01 May 2015 19:09:06 GMT

     [ https://issues.apache.org/jira/browse/YARN-2879?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Zhijie Shen resolved YARN-2879.
-------------------------------
    Resolution: Not A Problem

Close this validation jira. There's still one MR compatibility issue which is already filed.
We can deal with it separately.

> Compatibility validation between YARN 2.2/2.4 and 2.6
> -----------------------------------------------------
>
>                 Key: YARN-2879
>                 URL: https://issues.apache.org/jira/browse/YARN-2879
>             Project: Hadoop YARN
>          Issue Type: Bug
>            Reporter: Zhijie Shen
>            Assignee: Zhijie Shen
>
> Recently, I did some simple backward compatibility experiments. Bascially, I've taken
the following 2 steps:
> 1. Deploy the application (MR and DistributedShell) that is compiled against *old* YARN
API (2.2/2.4) on *new* YARN cluster (2.6). The application is submitted via *new* Hadoop (2.6)
client.
> 2. Deploy the application (MR and DistributedShell) that is compiled against *old* YARN
API (2.2/2.4) on *new* YARN cluster (2.6). The application is submitted via *old* Hadoop (2.2/2.4)
client that comes with the app.
> I've tried these 2 steps on both insecure and secure cluster. Here's a short summary:
> || || || DS 2.2 || DS 2.4 || MR 2.2 + Shuffle and RT 2.2 || MR 2.2 + Shuffle and RT 2.6
|| MR 2.4 + Shuffle and RT 2.4 || MR 2.4 + Shuffle and RT 2.6 ||
> | Insecure | New Client | OK | OK | Client Incompatible | Client Incompatible | OK |
OK |
> | Insecure | Old Client | OK | OK | AM Incompatible | Client Incompatible | OK | OK |
> | Secure | New Client | OK | OK | Client Incompatible | Client Incompatible | OK | OK
|
> | Secure | Old Client | OK | OK | AM Incompatible | Client Incompatible | OK | OK |
> Note that I've tried to run NM with both old and new version of shuffle handler plus
the runtime libs.
> In general, the compatibility looks good overall. There're a few issues that are related
to MR, but they seem to be not the YARN issue. I'll post the individual problem in the follow-up
comments.



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