srowen commented on issue #20356: [SPARK-23185][SQL] Make the configuration "spark.default.parallelism" can be changed on each SQL session to decrease empty files URL: https://github.com/apache/spark/pull/20356#issuecomment-446350850 Yeah this isn't the right fix. It's 'default' parallelism after all. This would potentially increase the number of output files in other situations, and also create empty files, like when there are fewer rows than default parallelism.
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