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https://issues.apache.org/jira/browse/SPARK-11640?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sean Owen resolved SPARK-11640.
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    Resolution: Not A Problem

> shading packages in spark-assembly jar
> --------------------------------------
>
>                 Key: SPARK-11640
>                 URL: https://issues.apache.org/jira/browse/SPARK-11640
>             Project: Spark
>          Issue Type: Wish
>          Components: Build
>            Reporter: PJ Fanning
>
> The spark assembly jar contains classes from many external dependencies like 
> hadoop and bouncycastle.
> I have run into issues trying to use bouncycastle code in a Spark job because 
> the JCE codebase expects the encryption code to be in a signed jar and since 
> the classes are copied into spark-assembly jar and it is not signed, the JCE 
> framework returns an error.
> If the bouncycastle classes in spark-assembly were shaded, then I could 
> deploy the properly signed bcprov jar. The spark code could access the shaded 
> copies of the bouncycastle classes.



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