dongjoon-hyun commented on code in PR #41709:
URL: https://github.com/apache/spark/pull/41709#discussion_r1241335351


##########
core/src/main/scala/org/apache/spark/util/Utils.scala:
##########
@@ -2287,6 +2287,23 @@ private[spark] object Utils extends Logging with 
SparkClassUtils {
     }.map(threadInfoToThreadStackTrace)
   }
 
+  /** Return a heap dump. Used to capture dumps for the web UI */
+  def getHeapHistogram(): Array[String] = {
+    // From Java 9+, we can use 'ProcessHandle.current().pid()'
+    val pid = getProcessName().split("@").head
+    val builder = new ProcessBuilder("jmap", "-histo:live", pid)
+    builder.redirectErrorStream(true)

Review Comment:
   ~That's totally different feature. This is designed as a part of Spark 
Driver UI, @mridulm .~
   Sorry, I misunderstood this request. Sure, I'll try.



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