Github user vanzin commented on the issue: https://github.com/apache/spark/pull/15669 If I understand the issue here, the problem is not `--files` but setting `spark.files` through `--conf` (or the config file). The former is translated into `spark.yarn.dist.files` by `SparkSubmit` but it seems the latter isn't, and to me that's the bug. So basically what Tom and Mridul have said. I think the correct fix would be in either `SparkSubmit.scala` or YARN's `Client.scala` - probably the latter to keep the YARN-specific stuff in one place.
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