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https://issues.apache.org/jira/browse/YARN-5467?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15423736#comment-15423736
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Subru Krishnan commented on YARN-5467:
--------------------------------------

[~giovanni.fumarola], the latest patch LGTM. I just have one request, can you 
use slf4j instead of log4j for the Logger especially since these are new 
classes. Thanks. 

> InputValidator for the FederationStateStore internal APIs
> ---------------------------------------------------------
>
>                 Key: YARN-5467
>                 URL: https://issues.apache.org/jira/browse/YARN-5467
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: nodemanager, resourcemanager
>            Reporter: Subru Krishnan
>            Assignee: Giovanni Matteo Fumarola
>         Attachments: YARN-5467-YARN-2915.v0.patch, 
> YARN-5467-YARN-2915.v1.patch, YARN-5467-YARN-2915.v2.patch, 
> YARN-5467-YARN-2915.v3.patch, YARN-5467-YARN-2915.v4.patch, 
> YARN-5467-YARN-2915.v5.patch, YARN-5467-YARN-2915.v6.patch
>
>
> We need to check for mandatory fields, well formed-ness (for address fields) 
> etc of input params to FederationStateStore. This is common across all Store 
> implementations and can be used as a _fail-fast_ mechanism on the client side.



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