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https://issues.apache.org/jira/browse/SPARK-11140?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14980526#comment-14980526
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Jacek Lewandowski commented on SPARK-11140:
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[~vanzin] it would be better to use SSL key-pair than Digest-MD5 for encryption
- it is pretty outdated and currently marked as historic in RFC 6331
(https://tools.ietf.org/html/rfc6331).
Anyway, I like the idea of moving file server to RPC and I know it will open
more ways to configure authentication and encryption.
> Replace file server in driver with RPC-based alternative
> --------------------------------------------------------
>
> Key: SPARK-11140
> URL: https://issues.apache.org/jira/browse/SPARK-11140
> Project: Spark
> Issue Type: Sub-task
> Components: Spark Core
> Reporter: Marcelo Vanzin
>
> As part of making configuring encryption easy in Spark, it would be better to
> use the existing RPC channel between driver and executors to transfer files
> and jars added to the application.
> This would remove the need to start the HTTP server currently used for that
> purpose, which needs to be configured to use SSL if encryption is wanted. SSL
> is kinda hard to configure correctly in a multi-user, distributed environment.
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