[GitHub] [spark] BryanCutler commented on issue #24734: [SPARK-27870][SQL][PySpark] Flush each batch for pandas UDF (for improving pandas UDFs pipeline)

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BryanCutler 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-497109494
 
 
   >@BryanCutler The issue is that without flush the reader side might not even see the data
   
   You mean the reader in Python? Could you explain a little more about how that would happen?  The way it looks to me is that Scala continuously writes data and is only blocked when the write buffer is full, meaning Python will always have data to read and a flush would not help.

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