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https://issues.apache.org/jira/browse/HADOOP-15774?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16623736#comment-16623736
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Billie Rinaldi commented on HADOOP-15774:
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bq. Would it make sense to make the registry a standalone service instead of
running in the RM?
There isn't really anything running in the RM. The registry is more of a
convention about how things are stored in ZooKeeper under /registry. The
Registry DNS server that hosts DNS records based on registry data runs as a
separate daemon.
bq. Being part of the YARN may bring some weird dependencies
I think it would be possible to refactor the
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-registry module and move it to
hadoop common if there are HDFS/YARN dependency issues.
> Discovery of HA servers
> -----------------------
>
> Key: HADOOP-15774
> URL: https://issues.apache.org/jira/browse/HADOOP-15774
> Project: Hadoop Common
> Issue Type: New Feature
> Reporter: Íñigo Goiri
> Priority: Major
> Attachments: Discovery Service.pdf
>
>
> Currently, Hadoop relies on configuration files to specify the servers.
> This requires maintaining these configuration files and propagating the
> changes.
> Hadoop should have a framework to provide discovery.
> For example, in HDFS, we could define the Namenodes in a shared location and
> the DNs would use the framework to find the Namenodes.
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