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[SPARK-10087] [CORE] Disable spark.shuffle.reduceLocality.enabled by default. #8280

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[SPARK-10087] [CORE] Disable spark.shuffle.reduceLocality.enabled by default. #8280

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2 changes: 1 addition & 1 deletion core/src/main/scala/org/apache/spark/scheduler/DAGScheduler.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -138,7 +138,7 @@ class DAGScheduler(

// Flag to control if reduce tasks are assigned preferred locations
private val shuffleLocalityEnabled =
sc.getConf.getBoolean("spark.shuffle.reduceLocality.enabled", true)
sc.getConf.getBoolean("spark.shuffle.reduceLocality.enabled", false)
// Number of map, reduce tasks above which we do not assign preferred locations
// based on map output sizes. We limit the size of jobs for which assign preferred locations
// as computing the top locations by size becomes expensive.
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