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From "Jongyoul Lee (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-6771) Use classloader inside configuration class to make new classes
Date Wed, 19 Jul 2017 04:57:00 GMT

    [ https://issues.apache.org/jira/browse/YARN-6771?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16092568#comment-16092568

Jongyoul Lee commented on YARN-6771:

Thanks for the reply. I'm developing cluster manager feature in Apache Zeppelin. I've tried
to use Yarn Client to communicate with Yarn cluster. Avoiding conflicts of dependencies, I
wanted to use custom classloader for initializing yarn client in the Zeppelin's server process,
but it failed because this implementation uses system classloader even I set the custom classloader
in the Configuration. I changed my implementation to include hadoop libs into process directly
but I think we need to change it to work correctly.

> Use classloader inside configuration class to make new classes 
> ---------------------------------------------------------------
>                 Key: YARN-6771
>                 URL: https://issues.apache.org/jira/browse/YARN-6771
>             Project: Hadoop YARN
>          Issue Type: Bug
>    Affects Versions: 2.8.1, 3.0.0-alpha4
>            Reporter: Jongyoul Lee
>             Fix For: 2.8.2
>         Attachments: YARN-6771-1.patch, YARN-6771-2.patch, YARN-6771.patch
> While running {{RpcClientFactoryPBImpl.getClient}}, {{RpcClientFactoryPBImpl}} uses {{localConf.getClassByName}}.
But in case of using custom classloader, we have to use {{conf.getClassByName}} because custom
classloader is already stored in {{Configuration}} class.

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