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https://issues.apache.org/jira/browse/SPARK-10997?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Marcelo Vanzin resolved SPARK-10997.
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Resolution: Fixed
Assignee: Marcelo Vanzin
Fix Version/s: 1.6.0
> Netty-based RPC env should support a "client-only" mode.
> --------------------------------------------------------
>
> Key: SPARK-10997
> URL: https://issues.apache.org/jira/browse/SPARK-10997
> Project: Spark
> Issue Type: Improvement
> Components: Spark Core
> Affects Versions: 1.6.0
> Reporter: Marcelo Vanzin
> Assignee: Marcelo Vanzin
> Fix For: 1.6.0
>
>
> The new netty RPC still behaves too much like akka; it requires both client
> (e.g. an executor) and server (e.g. the driver) to listen for incoming
> connections.
> That is not necessary, since sockets are full-duplex and RPCs should be able
> to flow either way on any connection. Also, because the semantics of the
> netty-based RPC don't exactly match akka, you get weird issues like
> SPARK-10987.
> Supporting a client-only mode also reduces the number of ports Spark apps
> need to use.
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