Github user dongjoon-hyun commented on a diff in the pull request:
https://github.com/apache/spark/pull/18555#discussion_r126315874
--- Diff:
core/src/main/scala/org/apache/spark/internal/config/package.scala ---
@@ -327,6 +421,8 @@ package object config {
.doc("The blocks of a shuffle request will be fetched to disk when
size of the request is " +
"above this threshold. This is to avoid a giant request takes too
much memory.")
.bytesConf(ByteUnit.BYTE)
+ .checkValue(_ > 0,
+ "Size of the request is above this threshold event queue must not
be negative")
--- End diff --
ditto. `positive`.
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