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From "Markus Weimer (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (REEF-1274) Add validation to YarnConfigurationConstructor
Date Thu, 24 Mar 2016 16:09:25 GMT

    [ https://issues.apache.org/jira/browse/REEF-1274?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15210470#comment-15210470
] 

Markus Weimer commented on REEF-1274:
-------------------------------------

This can certainly be done, but probably in a separate JIRA. Do you want to make this your
inaugural REEF JIRA?

> Add validation to YarnConfigurationConstructor
> ----------------------------------------------
>
>                 Key: REEF-1274
>                 URL: https://issues.apache.org/jira/browse/REEF-1274
>             Project: REEF
>          Issue Type: New Feature
>          Components: REEF-Runtime-YARN
>            Reporter: Markus Weimer
>
> A frequent problem REEF applications encounter is a broken or unavailable YARN Configuration
of the cluster. REEF can help with the diagnose of such issues as we always load / instantiate
the YARN Configuration via {{o..r.runtime.yarn.util.YarnConfigurationConstructor}}. In that
class, we can validate the YARN configuration and report WARNINGs into the log if something
is odd. For example:
>   * Is the RM IP set and reachable?
>   * Is the classpath set and non-empty? If not, are the environment variables set?
>   * Can a `FileSystem` instance be created using that configuration?
> There are probably more tests we can perform as we hear from our users.



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