dongjoon-hyun commented on a change in pull request #25787: [SPARK-29081][CORE]
Replace calls to SerializationUtils.clone on properties with a faster
implementation
URL: https://github.com/apache/spark/pull/25787#discussion_r324415225
##########
File path: core/src/main/scala/org/apache/spark/SparkContext.scala
##########
@@ -346,7 +346,7 @@ class SparkContext(config: SparkConf) extends Logging {
override protected def childValue(parent: Properties): Properties = {
// Note: make a clone such that changes in the parent properties aren't
reflected in
// the those of the children threads, which has confusing semantics
(SPARK-10563).
- SerializationUtils.clone(parent)
Review comment:
Please remove the unused import together in this PR.
```
import org.apache.commons.lang3.SerializationUtils
```
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