Github user vanzin commented on the issue: https://github.com/apache/spark/pull/20192 > users with custom docker images can override the classpath by I wrote this in a comment above, but there needs to be a proper definition of how to customize these docker images. There needs to be a contract between the submission code, the entry point, and how stuff is laid out inside the image, and I don't see that specified anywhere. However that's done, I also would suggest that env variables be avoided.
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