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From "Ellen Hui (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (YARN-6413) Decouple Yarn Registry API from ZK
Date Wed, 09 Aug 2017 23:59:00 GMT

     [ https://issues.apache.org/jira/browse/YARN-6413?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Ellen Hui updated YARN-6413:
    Attachment: 0004-Registry-API-api-stubbed.patch

Hi [~jianhe], I've added some stubs, and a ServiceRecordKey implementation that just wraps
the ZK path for the ZK implementation to use. The client can use it however they want, though
I think it should be standardized one way or another.

My thought is this: the ZK implementation will implement RegistryOperations, RegistryStoreProtocol,
and RegistryListenerProtocol. The RegistryOperations methods will be stubbed out, so anything
that relies on them will still compile, and yarn-native-services will compile. After yarn-native-services
moves over to to actually use the new APIs, RegistryOperations can then be fully deprecated.

I want to confirm with you that the methods in RegistryStoreProtocol and RegistryListenerProtocol,
if I implement them and remove RegistryOperations entirely, will be ok for yarn-native-services.

> 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, 0002-Registry-API-v2.patch, 0003-Registry-API-api-only.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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