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From "Jian He (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-6413) Decouple Yarn Registry API from ZK
Date Wed, 14 Jun 2017 23:07:00 GMT

    [ https://issues.apache.org/jira/browse/YARN-6413?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16049782#comment-16049782
] 

Jian He commented on YARN-6413:
-------------------------------

e.g. Several places in RegistryCli has been reformatted.
Also, looks like the entire file of RegistryOperationsFactory and RegistryUtils are reformatted.

Typically, we don't introduce large trunks of reformatting-only changes because that makes
the review harder, as people would have to read unnecessary code changes. And it also makes
the history hard to track, when user are trying to find logic changes in history. sometimes
it's also harder to merge back.

> Decouple Yarn Registry API from ZK
> ----------------------------------
>
>                 Key: YARN-6413
>                 URL: https://issues.apache.org/jira/browse/YARN-6413
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: amrmproxy, api, resourcemanager
>            Reporter: Ellen Hui
>            Assignee: Ellen Hui
>         Attachments: 0001-Registry-API-v2.patch, 0001-WIP-Registry-API-v2.patch
>
>
> Right now the Yarn Registry API (defined in the RegistryOperations interface) is a very
thin layer over Zookeeper. This jira proposes changing the interface to abstract away the
implementation details so that we can write a FS-based implementation of the registry service,
which will be used to support AMRMProxy HA.
> The new interface will use register/delete/resolve APIs instead of Zookeeper-specific
operations like mknode. 



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