summaryzb commented on code in PR #50489:
URL: https://github.com/apache/spark/pull/50489#discussion_r2032446270


##########
core/src/main/scala/org/apache/spark/serializer/SerializationDebugger.scala:
##########
@@ -110,11 +112,11 @@ private[spark] object SerializationDebugger extends 
Logging {
             val elem = s"externalizable object (class ${e.getClass.getName}, 
$e)"
             visitExternalizable(e, elem :: stack)
 
-          case s: Object with java.io.Serializable =>
+          case s: Object with java.io.Serializable if Utils.isTesting =>
             val str = try {
               String.valueOf(s)

Review Comment:
   Follow suggestion



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