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https://issues.apache.org/jira/browse/SPARK-3883?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14165986#comment-14165986
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Jacek Lewandowski commented on SPARK-3883:
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https://github.com/apache/spark/pull/2739
> Provide SSL support for Akka and HttpServer based connections
> -------------------------------------------------------------
>
> Key: SPARK-3883
> URL: https://issues.apache.org/jira/browse/SPARK-3883
> Project: Spark
> Issue Type: Improvement
> Components: Spark Core
> Reporter: Jacek Lewandowski
>
> Spark uses at least 4 logical communication channels:
> 1. Control messages - Akka based
> 2. JARs and other files - Jetty based (HttpServer)
> 3. Computation results - Java NIO based
> 4. Web UI - Jetty based
> The aim of this feature is to enable SSL for (1) and (2).
> Why:
> Spark configuration is sent through (1). Spark configuration may contain
> sensitive information like credentials for accessing external data sources or
> streams. Application JAR files (2) may include the application logic and
> therefore they may include information about the structure of the external
> data sources, and credentials as well.
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