cloud-fan commented on code in PR #37855:
URL: https://github.com/apache/spark/pull/37855#discussion_r975989551
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sql/core/src/main/scala/org/apache/spark/sql/execution/exchange/ShuffleExchangeExec.scala:
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@@ -299,7 +300,8 @@ object ShuffleExchangeExec {
def getPartitionKeyExtractor(): InternalRow => Any = newPartitioning match
{
case RoundRobinPartitioning(numPartitions) =>
// Distributes elements evenly across output partitions, starting from
a random partition.
- var position = new
Random(TaskContext.get().partitionId()).nextInt(numPartitions)
Review Comment:
Sorry I may miss something. The original code should already produce
different starting positions for different mapper tasks?
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