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Date: Sat, 23 Jan 2016 02:35:40 +0000 (UTC)
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Subject: [jira] [Commented] (YARN-4496) Improve HA ResourceManager Failover
 detection on the client
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    [ https://issues.apache.org/jira/browse/YARN-4496?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15113495#comment-15113495 ] 

Hudson commented on YARN-4496:
------------------------------

FAILURE: Integrated in Hadoop-trunk-Commit #9172 (See [https://builds.apache.org/job/Hadoop-trunk-Commit/9172/])
YARN-4496. Improve HA ResourceManager Failover detection on the client. (xgong: rev 618bfd6ac2a5b62d39e9bed80f75362bafc0ef28)
* hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-tests/src/test/java/org/apache/hadoop/yarn/server/MiniYARNCluster.java
* hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/test/java/org/apache/hadoop/yarn/server/nodemanager/TestNodeStatusUpdater.java
* hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/client/ConfiguredRMFailoverProxyProvider.java
* hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/client/RequestHedgingRMFailoverProxyProvider.java
* hadoop-yarn-project/CHANGES.txt
* hadoop-yarn-project/hadoop-yarn/hadoop-yarn-client/src/test/java/org/apache/hadoop/yarn/client/TestHedgingRequestRMFailoverProxyProvider.java
* hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/client/RMProxy.java


> Improve HA ResourceManager Failover detection on the client
> -----------------------------------------------------------
>
>                 Key: YARN-4496
>                 URL: https://issues.apache.org/jira/browse/YARN-4496
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: client, resourcemanager
>            Reporter: Arun Suresh
>            Assignee: Jian He
>             Fix For: 2.9.0
>
>         Attachments: YARN-4496.1.patch, YARN-4496.2.patch, YARN-4496.3.patch, YARN-4496.4.patch, YARN-4496.5.patch, YARN-4496.6.patch
>
>
> HDFS deployments can currently use the {{RequestHedgingProxyProvider}} to improve Namenode failover detection in the client. It does this by concurrently trying all namenodes and picks the namenode that returns the fastest with a successful response as the active node.
> It would be useful to have a similar ProxyProvider for the Yarn RM (it can possibly be done by converging some the class hierarchies to use the same ProxyProvider)
> This would especially be useful for large YARN deployments with multiple standby RMs where clients will be able to pick the active RM without having to traverse a list of configured RMs. 


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