mengxr commented on issue #24734: [SPARK-27870][SQL][PySpark] Flush each batch for pandas UDF (for improving pandas UDFs pipeline) URL: https://github.com/apache/spark/pull/24734#issuecomment-497104464 @BryanCutler The issue is that without flush the reader side might not even see the data. I think we need a method like async flush here.
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