Github user jerryshao commented on a diff in the pull request:
https://github.com/apache/spark/pull/21474#discussion_r204021872
--- Diff:
core/src/main/scala/org/apache/spark/internal/config/package.scala ---
@@ -429,7 +429,11 @@ package object config {
"external shuffle service, this feature can only be worked when
external shuffle" +
"service is newer than Spark 2.2.")
.bytesConf(ByteUnit.BYTE)
- .createWithDefault(Long.MaxValue)
--- End diff --
I think the original purpose to set to `Long.MaxValue` is to avoid using
this configuration by default, user should set to a proper size to enable this
feature. But anyway I think the current change is also fine.
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