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[SPARK-53955][CORE][3.5] Prefer to detect Java Home from env JAVA_HOME on finding jmap for JDK 8 #52665

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[SPARK-53955][CORE][3.5] Prefer to detect Java Home from env JAVA_HOME on finding jmap for JDK 8 #52665

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3 changes: 2 additions & 1 deletion core/src/main/scala/org/apache/spark/util/Utils.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -2142,7 +2142,8 @@ private[spark] object Utils
def getHeapHistogram(): Array[String] = {
// From Java 9+, we can use 'ProcessHandle.current().pid()'
val pid = getProcessName().split("@").head
val jmap = System.getProperty("java.home") + "/bin/jmap"
val jmap = Option(System.getenv("JAVA_HOME"))
.getOrElse(System.getProperty("java.home")) + "/bin/jmap"
val builder = new ProcessBuilder(jmap, "-histo:live", pid)
val p = builder.start()
val rows = ArrayBuffer.empty[String]
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