zhengruifeng commented on code in PR #38613: URL: https://github.com/apache/spark/pull/38613#discussion_r1019833916
########## connector/connect/src/main/scala/org/apache/spark/sql/connect/service/SparkConnectStreamHandler.scala: ########## @@ -184,9 +158,30 @@ class SparkConnectStreamHandler(responseObserver: StreamObserver[Response]) exte responseObserver.onNext(response.build()) numSent += 1 } + } + + // Store collection results for worst case of 1 to N-1 partitions + val results = new Array[Array[Batch]](numPartitions - 1) + var lastIndex = -1 // index of last partition written - currentPartitionId += 1 + // Handler to eagerly write partitions in order + val resultHandler = (partitionId: Int, partition: Array[Batch]) => { + // If result is from next partition in order + if (partitionId - 1 == lastIndex) { + writeBatches(partition) + lastIndex += 1 + // Write stored partitions that come next in order + while (lastIndex < results.length && results(lastIndex) != null) { + writeBatches(results(lastIndex)) + results(lastIndex) = null + lastIndex += 1 + } + } else { + // Store partitions received out of order + results(partitionId - 1) = partition + } } + spark.sparkContext.runJob(batches, (iter: Iterator[Batch]) => iter.toArray, resultHandler) Review Comment: +1 for match the implementations -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org For additional commands, e-mail: reviews-h...@spark.apache.org