Github user dongjoon-hyun commented on a diff in the pull request:
https://github.com/apache/spark/pull/18555#discussion_r126315844
--- Diff:
core/src/main/scala/org/apache/spark/internal/config/package.scala ---
@@ -183,32 +254,42 @@ package object config {
.createOptional
private[spark] val PYSPARK_DRIVER_PYTHON =
ConfigBuilder("spark.pyspark.driver.python")
+ .doc("Python binary executable to use for PySpark in driver.")
.stringConf
.createOptional
private[spark] val PYSPARK_PYTHON = ConfigBuilder("spark.pyspark.python")
+ .doc("Python binary executable to use for PySpark in both driver and
executors.")
.stringConf
.createOptional
// To limit memory usage, we only track information for a fixed number
of tasks
private[spark] val UI_RETAINED_TASKS =
ConfigBuilder("spark.ui.retainedTasks")
+ .doc("How many tasks the Spark UI and status APIs remember before
garbage collecting.")
.intConf
+ .checkValue(_ > 0, "Number of Tasks event queue must not be negative")
--- End diff --
Since `_ > 0`, we should avoid 0, too.
`must not be negative` => `must be positive`.
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