dongjoon-hyun commented on code in PR #50729:
URL: https://github.com/apache/spark/pull/50729#discussion_r2062502038


##########
common/utils/src/main/scala/org/apache/spark/internal/config/ConfigBuilder.scala:
##########
@@ -74,29 +69,68 @@ private object ConfigHelpers {
     v.map(stringConverter).mkString(",")
   }
 
-  def timeFromString(str: String, unit: TimeUnit): Long = 
JavaUtils.timeStringAs(str, unit)
+  def timeFromString(str: String, unit: TimeUnit, key: String): Long = {
+    try {
+      JavaUtils.timeStringAs(str, unit)
+    } catch {
+      case _: NumberFormatException => throw configTypeMismatchError(key, str, 
s"time in $unit")
+    }
+  }
 
   def timeToString(v: Long, unit: TimeUnit): String = 
s"${TimeUnit.MILLISECONDS.convert(v, unit)}ms"
 
-  def byteFromString(str: String, unit: ByteUnit): Long = {
-    val (input, multiplier) =
-      if (str.length() > 0 && str.charAt(0) == '-') {
-        (str.substring(1), -1)
-      } else {
-        (str, 1)
-      }
-    multiplier * JavaUtils.byteStringAs(input, unit)
+  def byteFromString(str: String, unit: ByteUnit, key: String): Long = {
+    try {
+      val (input, multiplier) =
+        if (str.nonEmpty && str.charAt(0) == '-') {
+          (str.substring(1), -1)
+        } else {
+          (str, 1)
+        }
+      multiplier * JavaUtils.byteStringAs(input, unit)
+    } catch {
+      case _: NumberFormatException =>
+        throw configTypeMismatchError(key, str, s"bytes in $unit")
+    }
   }
 
   def byteToString(v: Long, unit: ByteUnit): String = s"${unit.convertTo(v, 
ByteUnit.BYTE)}b"
 
   def regexFromString(str: String, key: String): Regex = {
     try str.r catch {
-      case e: PatternSyntaxException =>
-        throw new IllegalArgumentException(s"$key should be a regex, but was 
$str", e)
+      case _: PatternSyntaxException => throw configTypeMismatchError(key, 
str, "regex")
     }
   }
 
+  def configTypeMismatchError(
+      key: String, value: String, configType: String): 
SparkIllegalArgumentException = {
+     new SparkIllegalArgumentException(

Review Comment:
   indentation?



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