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https://issues.apache.org/jira/browse/YARN-8333?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16496567#comment-16496567
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Hudson commented on YARN-8333:
------------------------------
FAILURE: Integrated in Jenkins build Hadoop-trunk-Commit #14323 (See
[https://builds.apache.org/job/Hadoop-trunk-Commit/14323/])
YARN-8333. Load balance YARN services using RegistryDNS multiple A (billie: rev
6bc92e304fe05e80f13830104d1fd2c59da8344b)
* (edit)
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-registry/src/main/java/org/apache/hadoop/registry/server/dns/ContainerServiceRecordProcessor.java
* (edit)
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-registry/src/test/java/org/apache/hadoop/registry/server/dns/TestRegistryDNS.java
* (edit)
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-site/src/site/markdown/yarn-service/ServiceDiscovery.md
* (edit)
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-registry/src/main/java/org/apache/hadoop/registry/server/dns/BaseServiceRecordProcessor.java
> Load balance YARN services using RegistryDNS multiple A records
> ---------------------------------------------------------------
>
> Key: YARN-8333
> URL: https://issues.apache.org/jira/browse/YARN-8333
> Project: Hadoop YARN
> Issue Type: Improvement
> Components: yarn-native-services
> Affects Versions: 3.1.0
> Reporter: Eric Yang
> Assignee: Eric Yang
> Priority: Major
> Attachments: YARN-8333.001.patch, YARN-8333.002.patch,
> YARN-8333.003.patch
>
>
> For scaling stateless containers, it would be great to support DNS round
> robin for fault tolerance and load balancing. The current DNS record format
> for RegistryDNS is
> [container-instance].[application-name].[username].[domain]. For example:
> {code}
> appcatalog-0.appname.hbase.ycluster. IN A 123.123.123.120
> appcatalog-1.appname.hbase.ycluster. IN A 123.123.123.121
> appcatalog-2.appname.hbase.ycluster. IN A 123.123.123.122
> appcatalog-3.appname.hbase.ycluster. IN A 123.123.123.123
> {code}
> It would be nice to add multi-A record that contains all IP addresses of the
> same component in addition to the instance based records. For example:
> {code}
> appcatalog.appname.hbase.ycluster. IN A 123.123.123.120
> appcatalog.appname.hbase.ycluster. IN A 123.123.123.121
> appcatalog.appname.hbase.ycluster. IN A 123.123.123.122
> appcatalog.appname.hbase.ycluster. IN A 123.123.123.123
> {code}
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