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From "Tom White (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-1028) Add FailoverProxyProvider like capability to RMProxy
Date Wed, 11 Dec 2013 15:24:16 GMT

    [ https://issues.apache.org/jira/browse/YARN-1028?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13845471#comment-13845471
] 

Tom White commented on YARN-1028:
---------------------------------

It looks like the behaviour in this patch differs from the way failover is implemented for
HDFS HA, where it is controlled by dfs.client.failover settings (e.g. dfs.client.failover.max.attempts
is configured explicitly rather than being calculated from the IPC settings). Would having
the corresponding settings for RM HA make sense? (E.g. from a configuration consistency and
well-tested code path point of view.)

Why do you need both YarnFailoverProxyProvider and ConfiguredFailoverProxyProvider? The latter
should be sufficient; it might also be called RMFailoverProxyProvider.

> Add FailoverProxyProvider like capability to RMProxy
> ----------------------------------------------------
>
>                 Key: YARN-1028
>                 URL: https://issues.apache.org/jira/browse/YARN-1028
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>            Reporter: Bikas Saha
>            Assignee: Karthik Kambatla
>         Attachments: yarn-1028-1.patch, yarn-1028-2.patch, yarn-1028-3.patch, yarn-1028-4.patch,
yarn-1028-5.patch, yarn-1028-draft-cumulative.patch
>
>
> RMProxy layer currently abstracts RM discovery and implements it by looking up service
information from configuration. Motivated by HDFS and using existing classes from Common,
we can add failover proxy providers that may provide RM discovery in extensible ways.



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