Github user guoxiaolongzte commented on the issue:
https://github.com/apache/spark/pull/17220
In spark 1.4.1, you delete the parameter of 'hash'.I think it should be
deleted.In the spark website indicated in the documents, should not keep this
logic in the code.
*********************************1.4.1*************************************
val shortShuffleMgrNames = Map(
"hash" -> "org.apache.spark.shuffle.hash.HashShuffleManager",
"sort" -> "org.apache.spark.shuffle.sort.SortShuffleManager",
"tungsten-sort" ->
"org.apache.spark.shuffle.unsafe.UnsafeShuffleManager")
*********************************1.4.1*************************************
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