Github user vanzin commented on a diff in the pull request:
https://github.com/apache/spark/pull/7438#discussion_r34817673
--- Diff: python/pyspark/context.py ---
@@ -152,6 +152,11 @@ def _do_init(self, master, appName, sparkHome,
pyFiles, environment, batchSize,
self.master = self._conf.get("spark.master")
self.appName = self._conf.get("spark.app.name")
self.sparkHome = self._conf.get("spark.home", None)
+
+ # Let YARN know it's a pyspark app, so it distributes needed
libraries.
--- End diff --
Hmm, I kinda dislike having more coupling like this, but I can't see a
better solution without making assumptions like "all code goes through
spark-submit at some point", so I guess this will have to do.
Minor, but this should probably go into `_initialize_context` instead,
since if there's already a `jsc` initialized, this code won't have any effect.
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