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[SPARK-32824][Core] Improve the error message when the user forgets the .amount in a resource config #29685

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[SPARK-32824][Core] Improve the error message when the user forgets the .amount in a resource config #29685

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1fd826b
[SPARK-32824] Improve the error message when the user forgets the
tgravescs Sep 8, 2020
db665a1
Change to reuse index
tgravescs Sep 8, 2020
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7 changes: 6 additions & 1 deletion core/src/main/scala/org/apache/spark/resource/ResourceUtils.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -149,7 +149,12 @@ private[spark] object ResourceUtils extends Logging {

def listResourceIds(sparkConf: SparkConf, componentName: String): Seq[ResourceID] = {
sparkConf.getAllWithPrefix(s"$componentName.$RESOURCE_PREFIX.").map { case (key, _) =>
key.substring(0, key.indexOf('.'))
val index = key.indexOf('.')
if (index < 0) {
throw new SparkException(s"You must specify an amount config for resource: $key " +
s"config: $componentName.$RESOURCE_PREFIX.$key")
}
key.substring(0, index)
}.distinct.map(name => new ResourceID(componentName, name))
}

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